阅读说明：本技术 一种钢筋桁架楼承板及系统 (Steel bar truss floor support plate and system ) 是由 赵鹏洲 黄太华 冯浩 黄彬 于 2021-07-05 设计创作，主要内容包括：本发明提供一种钢筋桁架楼承板及生产方法,方法包括：钢筋桁架楼承板包括桁架与底板,桁架固定设置在所述底板上；桁架包括包括多个桁架单元以及用于连接多个桁架单元的连杆钢筋,桁架单元包括设置在第一参考面的上弦钢筋,设置在第二参考面的第一下弦钢筋与第二下弦钢筋,设置在第三参考面的第一腹杆钢筋以及设置在第四参考面的第二腹杆钢筋；其中,第一参考面、第二参考面、第三参考面以及第四参考面根据预设的优化模型来进行确定。能够在出厂前预先将钢筋桁架楼承板就进行加工制成,减少现场的安装作业量,提高了钢筋桁架楼承板的现场安装效率。同时具有较高的抗震性能,进而提高对应建筑的质量。(The invention provides a steel bar truss floor bearing plate and a production method thereof, wherein the method comprises the following steps: the steel bar truss floor support plate comprises a truss and a bottom plate, and the truss is fixedly arranged on the bottom plate; the truss comprises a plurality of truss units and connecting rod reinforcing steel bars used for connecting the truss units, the truss units comprise upper chord reinforcing steel bars arranged on a first reference surface, first lower chord reinforcing steel bars and second lower chord reinforcing steel bars arranged on a second reference surface, first web member reinforcing steel bars arranged on a third reference surface and second web member reinforcing steel bars arranged on a fourth reference surface; the first reference surface, the second reference surface, the third reference surface and the fourth reference surface are determined according to a preset optimization model. Can just process the steel bar truss building carrier plate in advance before dispatching from the factory and make, reduce the installation work volume on scene, improve the on-the-spot installation effectiveness of steel bar truss building carrier plate. Meanwhile, the building has higher anti-seismic performance, and the quality of the corresponding building is improved.)

1. The steel bar truss floor bearing plate is characterized by comprising a truss and a bottom plate, wherein the truss is fixedly arranged on the bottom plate;

the truss comprises a plurality of truss units and connecting rod reinforcing steel bars used for connecting the truss units, the truss units comprise upper chord reinforcing steel bars arranged on a first reference surface, first lower chord reinforcing steel bars and second lower chord reinforcing steel bars arranged on a second reference surface, first web member reinforcing steel bars arranged on a third reference surface and second web member reinforcing steel bars arranged on a fourth reference surface, the upper chord reinforcing steel bars and the first lower chord reinforcing steel bars are wound and supported on the third reference surface through the first web member reinforcing steel bars, and the upper chord reinforcing steel bars and the second lower chord reinforcing steel bars are wound and supported on the fourth reference surface through the second web member reinforcing steel bars;

the first reference surface, the second reference surface, the third reference surface and the fourth reference surface are determined according to a preset optimization model, the preset optimization model takes the frequency minimum as an objective function, and takes two-stage constraints of construction condition parameters and use condition parameters as constraint conditions.

2. The steel-bar truss floor deck of claim 1, wherein the first web member reinforcement includes a first upper-chord weld and a first lower-chord weld, the second web member reinforcement includes a second upper-chord weld and a second lower-chord weld, the first web member reinforcement is welded to the upper-chord reinforcement via the first upper-chord weld, the second web member reinforcement is welded to the upper-chord reinforcement via the second upper-chord weld, an upper portion of the first lower-chord weld is welded to the first lower-chord reinforcement, an upper portion of the second lower-chord weld is welded to the second lower-chord reinforcement, a lower portion of the first lower-chord weld is welded to the floor, and a lower portion of the second lower-chord weld is welded to the floor.

3. The steel truss floor deck of claim 2 wherein the tie bars include an upper chord tie welded in situ to the upper chord bars of the plurality of truss units and a lower chord tie welded in situ to the first and second lower chord bars of the plurality of truss units.

4. The steel bar truss floor deck according to claim 3, wherein the welded portion of the upper chord link is reinforced by a first steel bar work, and the welded portion of the lower chord link is reinforced by a second steel bar work, wherein the first steel bar work includes the upper chord link, the upper chord steel bar, the first upper chord welded portion and a second upper chord welded portion, and the second steel bar work includes the lower chord link, the first lower chord welded portion or the second lower chord welded portion.

5. The steel bar truss floor deck according to claim 4, wherein the bottom plate is a galvanized plate, the bottom plate is formed by a boss process, and two side edges of the bottom plate are provided with splicing structures for splicing two adjacent steel bar truss floor decks.

6. A production method of a steel bar truss floor support plate is characterized by comprising the following steps:

determining a first reference surface, a second reference surface, a third reference surface and a fourth reference surface according to a preset optimization model, wherein the preset optimization model takes the minimum frequency as a target function and takes two-stage constraints of construction condition parameters and use condition parameters as constraint conditions;

setting an upper chord steel bar according to the first reference surface, and setting a first lower chord steel bar and a second lower chord steel bar according to the second reference surface;

winding and supporting the upper chord steel bars and the first lower chord steel bars through first web member steel bars on the third reference surface, and winding and supporting the upper chord steel bars and the second lower chord steel bars through second web member steel bars on the fourth reference surface to obtain a truss unit;

connecting the truss units through connecting rod steel bars to obtain a truss;

and fixedly arranging the truss on a bottom plate to obtain the steel bar truss floor bearing plate.

7. The method for producing a steel bar truss floor deck as recited in claim 6, wherein the method further comprises:

determining a first upper chord welding part of the first web member steel bar according to an included angle between the first reference surface and the third reference surface, and welding the first upper chord welding part and the upper chord steel bar;

determining a first bending angle of a first lower chord welding part of the first web member steel bar according to an included angle between the second reference surface and the third reference surface, and bending the first web member steel bar according to the first bending angle to obtain the first lower chord welding part;

welding the upper part of the first lower-chord welding part with the first lower-chord steel bar, and welding the lower part of the first lower-chord welding part with the bottom plate;

determining a second upper chord welding part of the second web member steel bar according to an included angle between the first reference surface and the fourth reference surface, and welding the second upper chord welding part and the upper chord steel bar;

determining a second bending angle of a second lower chord welding part of the second web member steel bar according to an included angle between the second reference surface and the fourth reference surface, and bending the second web member steel bar according to the second bending angle to obtain the second lower chord welding part;

and welding the upper part of the second lower-chord welding part with the second lower-chord steel bar, and welding the lower part of the second lower-chord welding part with the bottom plate.

8. The steel bar truss floor deck as recited in claim 7, wherein the method further comprises:

welding the upper chord connecting rod with the upper chord steel bars of the plurality of truss units on site; and

and welding the lower chord connecting rod with the first lower chord reinforcing steel bars and the second lower chord reinforcing steel bars of the plurality of truss units on site.

9. The steel bar truss floor deck as recited in claim 8, wherein the method further comprises:

reinforcing the welding position of the upper chord connecting rod through a first steel bar project, wherein the first steel bar project comprises the upper chord connecting rod, the upper chord steel bar and the first upper chord welding part; and

and reinforcing the welding position of the lower chord connecting rod through a second steel bar project, wherein the second steel bar project comprises the lower chord connecting rod, the first lower chord welding part or the second lower chord welding part.

10. The steel bar truss floor deck as recited in claim 9, wherein the method further comprises:

forming the galvanized plate by a boss process to prepare the bottom plate; and

and processing splicing structures for splicing two adjacent steel bar truss floor bearing plates at the edges of two sides of the bottom plate.

Technical Field

The invention relates to the field of buildings, in particular to a steel bar truss floor bearing plate and a system.

Background

The steel bar truss floor bearing plate belongs to one of unsupported profiling combined floor bearing plates, and comprises a steel bar truss and a bottom plate; the steel bar truss is shaped and processed in a background processing field, the bottom plate is fixed on the beam by using studs or welding in site construction, then the steel bar truss is placed for binding, and concrete is poured after the floor bearing plate of the steel bar truss is accepted. However, in the field carries out the installation to steel bar truss building carrier plate, specifically in hookup location's fastener installation, need just can accomplish the installation through multichannel process, the work progress is comparatively loaded down with trivial details, for example place steel bar truss at the bottom plate now, need align, fix a position, fixed and ligature, especially in the installation, need the bottom plate usually, steel bar truss and fastener cooperate the installation in step, it is very inconvenient to lead to the site operation, the installation is troublesome, the efficiency of installation is not high. Therefore, the problem that the field installation efficiency is low exists in the existing floor support plate.

Disclosure of Invention

The embodiment of the invention provides a steel bar truss floor bearing plate which can be processed and manufactured in advance before leaving a factory, so that the field installation workload is reduced, and the field installation efficiency of the steel bar truss floor bearing plate is improved. Meanwhile, each reference surface of the truss is based on a preset optimization model, the frequency minimum is taken as a target function, two-stage constraints of construction condition parameters and use condition parameters are taken as constraint conditions, and the truss has high anti-seismic performance no matter in the construction process or in the delivery and use of buildings, so that the quality of the corresponding buildings is improved.

In a first aspect, an embodiment of the present invention provides a steel bar truss floor support plate, where the steel bar truss floor support plate includes a truss and a bottom plate, and the truss is fixedly disposed on the bottom plate;

the truss comprises a plurality of truss units and connecting rod reinforcing steel bars used for connecting the truss units, the truss units comprise upper chord reinforcing steel bars arranged on a first reference surface, first lower chord reinforcing steel bars and second lower chord reinforcing steel bars arranged on a second reference surface, first web member reinforcing steel bars arranged on a third reference surface and second web member reinforcing steel bars arranged on a fourth reference surface, the upper chord reinforcing steel bars and the first lower chord reinforcing steel bars are wound and supported on the third reference surface through the first web member reinforcing steel bars, and the upper chord reinforcing steel bars and the second lower chord reinforcing steel bars are wound and supported on the fourth reference surface through the second web member reinforcing steel bars;

the first reference surface, the second reference surface, the third reference surface and the fourth reference surface are determined according to a preset optimization model, the preset optimization model takes the frequency minimum as an objective function, and takes two-stage constraints of construction condition parameters and use condition parameters as constraint conditions.

Optionally, the first web member steel bar includes a first upper chord welding portion and a first lower chord welding portion, the second web member steel bar includes a second upper chord welding portion and a second lower chord welding portion, the first web member steel bar is welded to the upper chord steel bar through the first upper chord welding portion, the second web member steel bar is welded to the upper chord steel bar through the second upper chord welding portion, the upper portion of the first lower chord welding portion is welded to the first lower chord steel bar, the upper portion of the second lower chord welding portion is welded to the second lower chord steel bar, the lower portion of the first lower chord welding portion is welded to the bottom plate, and the lower portion of the second lower chord welding portion is welded to the bottom plate.

Optionally, the connecting rod reinforcing bars include an upper chord connecting bar and a lower chord connecting bar, the upper chord connecting bar is welded to the upper chord reinforcing bars of the plurality of truss units on site, and the lower chord connecting bar is welded to the first lower chord reinforcing bar and the second lower chord reinforcing bar of the plurality of truss units on site.

Optionally, the welding position of the upper chord connecting rod is reinforced by a first steel bar project, and the welding position of the lower chord connecting rod is reinforced by a second steel bar project, wherein the first steel bar project includes the upper chord connecting rod, the upper chord steel bar and the first upper chord welding portion, and the second steel bar project includes the lower chord connecting rod, the first lower chord welding portion or the second lower chord welding portion.

Optionally, the bottom plate is a galvanized plate, the bottom plate is formed through a boss process, and edges of two sides of the bottom plate are provided with a splicing structure for splicing two adjacent steel bar truss floor bearing plates.

In a second aspect, an embodiment of the present invention provides a method for producing a steel bar truss floor deck, where the method includes:

determining a first reference surface, a second reference surface, a third reference surface and a fourth reference surface according to a preset optimization model, wherein the preset optimization model takes the minimum frequency as a target function and takes two-stage constraints of construction condition parameters and use condition parameters as constraint conditions;

setting an upper chord steel bar according to the first reference surface, and setting a first lower chord steel bar and a second lower chord steel bar according to the second reference surface;

winding and supporting the upper chord steel bars and the first lower chord steel bars through first web member steel bars on the third reference surface, and winding and supporting the upper chord steel bars and the second lower chord steel bars through second web member steel bars on the fourth reference surface to obtain a truss unit;

connecting the truss units through connecting rod steel bars to obtain a truss;

and fixedly arranging the truss on a bottom plate to obtain the steel bar truss floor bearing plate.

Optionally, the production method further comprises:

determining a first upper chord welding part of the first web member steel bar according to an included angle between the first reference surface and the third reference surface, and welding the first upper chord welding part and the upper chord steel bar;

determining a first bending angle of a first lower chord welding part of the first web member steel bar according to an included angle between the second reference surface and the third reference surface, and bending the first web member steel bar according to the first bending angle to obtain the first lower chord welding part;

welding the upper part of the first lower-chord welding part with the first lower-chord steel bar, and welding the lower part of the first lower-chord welding part with the bottom plate;

determining a second upper chord welding part of the second web member steel bar according to an included angle between the first reference surface and the fourth reference surface, and welding the second upper chord welding part and the upper chord steel bar;

determining a second bending angle of a second lower chord welding part of the second web member steel bar according to an included angle between the second reference surface and the fourth reference surface, and bending the second web member steel bar according to the second bending angle to obtain the second lower chord welding part;

and welding the upper part of the second lower-chord welding part with the second lower-chord steel bar, and welding the lower part of the second lower-chord welding part with the bottom plate.

Optionally, the method further includes:

welding the upper chord connecting rod with the upper chord steel bars of the plurality of truss units on site; and

and welding the lower chord connecting rod with the first lower chord reinforcing steel bars and the second lower chord reinforcing steel bars of the plurality of truss units on site.

Optionally, the method further includes:

reinforcing the welding position of the upper chord connecting rod through a first steel bar project, wherein the first steel bar project comprises the upper chord connecting rod, the upper chord steel bar and the first upper chord welding part; and

and reinforcing the welding position of the lower chord connecting rod through a second steel bar project, wherein the second steel bar project comprises the lower chord connecting rod, the first lower chord welding part or the second lower chord welding part.

Optionally, the method further includes:

forming the galvanized plate by a boss process to prepare the bottom plate; and

and processing splicing structures for splicing two adjacent steel bar truss floor bearing plates at the edges of two sides of the bottom plate.

In the embodiment of the invention, the steel bar truss floor bearing plate comprises a truss and a bottom plate, wherein the truss is fixedly arranged on the bottom plate; the truss comprises a plurality of truss units and connecting rod reinforcing steel bars used for connecting the truss units, the truss units comprise upper chord reinforcing steel bars arranged on a first reference surface, first lower chord reinforcing steel bars and second lower chord reinforcing steel bars arranged on a second reference surface, first web member reinforcing steel bars arranged on a third reference surface and second web member reinforcing steel bars arranged on a fourth reference surface, the upper chord reinforcing steel bars and the first lower chord reinforcing steel bars are wound and supported on the third reference surface through the first web member reinforcing steel bars, and the upper chord reinforcing steel bars and the second lower chord reinforcing steel bars are wound and supported on the fourth reference surface through the second web member reinforcing steel bars; the first reference surface, the second reference surface, the third reference surface and the fourth reference surface are determined according to a preset optimization model, the preset optimization model takes the frequency minimum as an objective function, and takes two-stage constraints of construction condition parameters and use condition parameters as constraint conditions. Can just process the steel bar truss building carrier plate in advance before dispatching from the factory and make, reduce the installation work volume on scene, improve the on-the-spot installation effectiveness of steel bar truss building carrier plate. Meanwhile, each reference surface of the truss is based on a preset optimization model, the frequency minimum is taken as a target function, two-stage constraints of construction condition parameters and use condition parameters are taken as constraint conditions, and the truss has high anti-seismic performance no matter in the construction process or in the delivery and use of buildings, so that the quality of the corresponding buildings is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a structural diagram of a steel bar truss floor deck according to an embodiment of the present invention;

fig. 2 is a method for producing a steel bar truss floor deck according to an embodiment of the invention;

fig. 3 is another method for producing a steel bar truss floor deck according to an embodiment of the invention.

Wherein: 10. a base plate; 11. a first upper chord weld; 12. a second upper chord weld; 13. a first lower chord weld; 14. a second lower chord weld; 15. a first web member reinforcement bar; 16. a winding link; 17. a lower chord connecting rod; 18. a split structure; 19. a first lower chord rebar; 20. a second lower chord reinforcement; 21. upper chord steel bars; 22. and a second web member reinforcement.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The steel bar truss floor support plate can be processed and manufactured in advance before leaving a factory, only modular connection and installation and a small amount of steel bars are needed on site, the on-site installation workload is reduced, and the on-site installation efficiency of the steel bar truss floor support plate is improved. Meanwhile, each reference surface of the truss is based on a preset optimization model, the frequency minimum is taken as a target function, two-stage constraints of construction condition parameters and use condition parameters are taken as constraint conditions, and the truss has high anti-seismic performance no matter in the construction process or in the delivery and use of buildings, so that the quality of the corresponding buildings is improved.

Referring to fig. 1, fig. 1 is a structural diagram of a steel bar truss floor deck according to an embodiment of the present invention, as shown in fig. 1, the steel bar truss floor deck includes a truss and a bottom plate 10, and the truss is fixedly disposed on the bottom plate 10; the truss includes a plurality of truss units and link bars for connecting the plurality of truss units, the truss units include an upper chord bar 21 disposed on a first reference surface, a first lower chord bar 19 and a second lower chord bar 20 disposed on a second reference surface, a first web bar 15 disposed on a third reference surface, and a second web bar 22 disposed on a fourth reference surface, the upper chord bar 21 and the first lower chord bar 19 are wound and supported on the third reference surface by the first web bar 15, and the upper chord bar 21 and the second lower chord bar 20 are wound and supported on the fourth reference surface by the second web bar 22; the first reference surface, the second reference surface, the third reference surface and the fourth reference surface are determined according to a preset optimization model, the preset optimization model takes the frequency minimum as an objective function, and takes two-stage constraints of construction condition parameters and use condition parameters as constraint conditions.

In an embodiment of the present invention, the truss is a steel bar truss, and the truss is used as a steel bar structure in cast-in-place concrete of a building floor slab. The floor 10 may also be referred to as a formwork, and the floor 10 is mainly used to support the truss, support a construction live load during construction, and support a fixed load of floor concrete during use.

In an embodiment of the invention, a distance between the first reference surface and the second reference surface is 70mm to 250 mm. Specifically, the determination can be performed according to the design bearing force of the floor slabs of different floors. Preferably, the distance between the first reference surface and the second reference surface is determined according to an optimization result obtained after the optimization of the preset optimization model, so that the optimal anti-seismic performance of the steel bar truss floor bearing plate is obtained in the construction process, and the optimal anti-seismic performance of the floor slab is obtained in the using process.

In an embodiment of the present invention, the first reference surface, the second reference surface, the third reference surface, and the fourth reference surface form a cylinder with a triangular end surface. Specifically, the second reference surface, the third reference surface and the fourth reference surface form a cylinder with a triangular end face, the intersection line of the third reference surface and the fourth reference surface is on the first reference surface, and the first reference surface is parallel to the second reference surface.

In the embodiment of the invention, for the truss structure, the vibration frequency of a single steel bar is often higher than that of the whole truss, and in the construction stage, the triangular column body can be regarded as a hollow column body, and in the use stage, due to the interaction of concrete, the triangular column body can be regarded as a solid column body.

In the embodiment of the present invention, the construction condition parameters include minimum and maximum radii corresponding to the upper chord steel bar 21, the first lower chord steel bar 19, the second lower chord steel bar 20, the first web member steel bar 15, and the second web member steel bar 22; a minimum design length and a maximum design length of the truss unit; a minimum distance and a maximum distance between the first reference surface and the second reference surface.

Further, the frequency is a vibration frequency of the truss unit, and the objective function of the optimization model includes a construction stage objective function and a use stage objective function, where the construction stage objective function may be represented by the following formula:

in the above-described formula, the first and second groups,in the form of frequency differential of the truss unit at the construction stage. Epsilon_iThe modulus of elasticity, r, corresponding to the upper chord steel bar 21, the first lower chord steel bar 19, the second lower chord steel bar 20, the first web member steel bar 15 and the second web member steel bar 22 in the truss unit_iThe radius, N, corresponding to the upper chord steel bar 21, the first lower chord steel bar 19, the second lower chord steel bar 20, the first web member steel bar 15 and the second web member steel bar 22 in the truss unit₁As a function of the shape of the truss elements at the construction stage, p_iThe corresponding densities of the upper chord steel bar 21, the first lower chord steel bar 19, the second lower chord steel bar 20, the first web member steel bar 15 and the second web member steel bar 22 in the truss unit. l is the length of the truss unit.

The constraint conditions in the construction stage are shown in the following formula:

r_imin≤r_i≤r_imax

l_min≤l≤l_max

dis_min≤dis(N₁₂,N₁₄)≤dis_max

in the above formula, r is_iminR is the minimum radius of the truss unit corresponding to the upper chord steel bar 21, the first lower chord steel bar 19, the second lower chord steel bar 20, the first web member steel bar 15 and the second web member steel bar 22_imaxThe maximum radius of the truss unit corresponding to the upper chord steel bar 21, the first lower chord steel bar 19, the second lower chord steel bar 20, the first web member steel bar 15 and the second web member steel bar 22. Above l_minFor minimum design length of truss unit, the above_minFor minimum design length of truss unit, /)_maxThe maximum design length of the truss unit. N is above₁₁As a function of the third reference plane of the truss element, N₁₃As a function of the fourth reference plane of the truss element, N₁₂As a function of the first reference plane of the truss element, N₁₄Is a function of the first reference plane of the truss element. In the embodiment of the invention, f is solved₁To determine the above-mentioned value of a, wherein a is as described above_j、a_kIs an arbitrary reference coordinate (a) of the truss unit_j，a_k). Dis as described above_minIs the minimum distance, dis, between the first reference surface and the second reference surface_maxThe solving process can be calculated and solved through LINGO and MATLAB software, wherein the maximum distance between the first reference surface and the second reference surface is obtained.

The use phase objective function may be shown as follows:

wherein the content of the first and second substances,in the form of a frequency differential of the truss element at the stage of use. Epsilon is the modulus of elasticity corresponding to the concrete obtained by the truss unit, s is the thickness corresponding to the concrete obtained by the truss unit, N₂And p is a shape function corresponding to the concrete obtained by the truss unit in the construction stage, and is the density corresponding to the concrete obtained by the truss unit. l is the length of the truss unit.

The constraint conditions in the construction stage are shown in the following formula:

s_min≤s≤s_max

l_min≤l≤l_max

s_min≤dis(N₂₂,N₂₄)≤s_max

in the above formula, s is_minMinimum thickness of concrete obtained for truss elements, s_maxThe maximum thickness of the concrete obtained by the truss unit. Above l_minFor minimum design length of truss unit, the above_minFor minimum design length of truss unit, /)_maxThe maximum design length of the truss unit. N is above₂₁A third reference surface function corresponding to the concrete obtained for the truss unit, N₂₃A fourth reference surface function corresponding to the concrete obtained for the truss unit, N₂₂A first reference surface function corresponding to the concrete obtained for the truss unit, N₂₄And obtaining a first reference surface function corresponding to the concrete obtained by the truss unit. In the embodiment of the invention, f is solved₂Thereby determining the value of b, wherein b is as described above_j、b_kAs an arbitrary reference coordinate (b) of the truss unit_j，b_k). The solving process can be calculated and solved through LINGO and MATLAB software.

It should be noted that the concrete obtained by the truss unit is the solid column. Through the optimization, the steel bar truss structure with stronger shock resistance can be obtained by designing and processing the steel bar truss with the minimum vibration frequency.

Alternatively, the first web member reinforcement 15 includes a first upper-chord welded portion 11 and a first lower-chord welded portion 13, the second web member reinforcement 22 includes a second upper-chord welded portion 12 and a second lower-chord welded portion 14, the first web member reinforcement 15 is welded to the upper-chord reinforcement 21 by the first upper-chord welded portion 11, the second web member reinforcement 22 is welded to the upper-chord reinforcement 21 by the second upper-chord welded portion 12, the first lower-chord welded portion 13 is welded to the first lower-chord welded portion 19 above, the second lower-chord welded portion 14 is welded to the second lower-chord reinforcement 20 above, the first lower-chord welded portion 13 is welded to the bottom plate 10 below, and the second lower-chord welded portion 14 is welded to the bottom plate 10 below.

Optionally, the tie bars include an upper-chord tie bar 16 and a lower-chord tie bar 17, the upper-chord tie bar 16 is welded to the upper-chord tie bars 21 of the plurality of truss units in situ, and the lower-chord tie bar 17 is welded to the first lower-chord tie bar 19 and the second lower-chord tie bar 20 of the plurality of truss units in situ.

In the embodiment of the invention, the connecting rod steel bars are welded on site, so that when the steel bar truss floor bearing plates are transported, the two steel bar truss floor bearing plates can be folded to form a structure similar to a staggered and superposed dog-tooth structure, and the transportation is convenient. The on-site welding of the connecting rod reinforcing steel bars can be spot welding.

Alternatively, the welded portion of the upper-chord link 16 may be reinforced by a first reinforcing work, and the welded portion of the lower-chord link 17 may be reinforced by a second reinforcing work, wherein the first reinforcing work includes the upper-chord link 16, the upper-chord reinforcement 21, the first upper-chord welded portion 11, and the second upper-chord welded portion 12, and the second reinforcing work includes the lower-chord link 17, the first lower-chord welded portion 13, or the second lower-chord welded portion 14.

In the embodiment of the present invention, the first lower chord welding part 13 or the second lower chord welding part 14 has a bent structure, the bent angle of the first lower chord welding part 13 is determined by an angle between a second reference surface and a third reference surface, and the bent angle of the second lower chord welding part 14 is determined by an angle between the second reference surface and a fourth reference surface.

Optionally, the bottom plate 10 is a galvanized plate, the bottom plate 10 is formed by a boss process, and the edges of two sides of the bottom plate 10 are provided with splicing structures 18 for splicing two adjacent steel bar truss floor bearing plates.

In the embodiment of the present invention, the edge of the bottom plate 10 is formed with a raised edge by a boss process, so that the raised edge may be provided with a corresponding split structure 18, and the split structure 18 may be a reserved structure for stud welding.

In the embodiment of the invention, the steel bar truss floor bearing plate comprises a truss and a bottom plate, wherein the truss is fixedly arranged on the bottom plate; the truss comprises a plurality of truss units and connecting rod reinforcing steel bars used for connecting the truss units, the truss units comprise upper chord reinforcing steel bars arranged on a first reference surface, first lower chord reinforcing steel bars and second lower chord reinforcing steel bars arranged on a second reference surface, first web member reinforcing steel bars arranged on a third reference surface and second web member reinforcing steel bars arranged on a fourth reference surface, the upper chord reinforcing steel bars and the first lower chord reinforcing steel bars are wound and supported on the third reference surface through the first web member reinforcing steel bars, and the upper chord reinforcing steel bars and the second lower chord reinforcing steel bars are wound and supported on the fourth reference surface through the second web member reinforcing steel bars; the first reference surface, the second reference surface, the third reference surface and the fourth reference surface are determined according to a preset optimization model, the preset optimization model takes the frequency minimum as an objective function, and takes two-stage constraints of construction condition parameters and use condition parameters as constraint conditions. Can just process the steel bar truss building carrier plate in advance before dispatching from the factory and make, reduce the installation work volume on scene, improve the on-the-spot installation effectiveness of steel bar truss building carrier plate. Meanwhile, each reference surface of the truss is based on a preset optimization model, the frequency minimum is taken as a target function, two-stage constraints of construction condition parameters and use condition parameters are taken as constraint conditions, and the truss has high anti-seismic performance no matter in the construction process or in the delivery and use of buildings, so that the quality of the corresponding buildings is improved.

Optionally, referring to fig. 2, fig. 2 is a method for producing a steel bar truss floor deck according to an embodiment of the present invention, and as shown in fig. 2, the method for producing a steel bar truss floor deck includes:

and S1, determining a first reference surface, a second reference surface, a third reference surface and a fourth reference surface according to a preset optimization model, wherein the preset optimization model takes the frequency minimum as an objective function and takes two-stage constraints of construction condition parameters and use condition parameters as constraint conditions.

And S2, arranging the upper chord steel bars according to the first reference surface, and arranging the first lower chord steel bars and the second lower chord steel bars according to the second reference surface.

And S3, winding and supporting the upper chord steel bars and the first lower chord steel bars through the first web member steel bars on the third reference surface, and winding and supporting the upper chord steel bars and the second lower chord steel bars through the second web member steel bars on the fourth reference surface to obtain the truss unit.

And S4, connecting the truss units through connecting rod steel bars to obtain the truss.

And S5, fixing the truss on the bottom plate to obtain the steel bar truss floor bearing plate.

In an embodiment of the present invention, the truss is a steel bar truss, and the truss is used as a steel bar structure in cast-in-place concrete of a building floor slab. The floor may also be referred to as a formwork, and the floor is mainly used to support the truss, support a construction live load during construction, and support a fixed load of floor concrete during use.

In an embodiment of the invention, a distance between the first reference surface and the second reference surface is 70mm to 250 mm. Specifically, the determination can be performed according to the design bearing force of the floor slabs of different floors. Preferably, the distance between the first reference surface and the second reference surface is determined according to an optimization result obtained after the optimization of the preset optimization model, so that the optimal anti-seismic performance of the steel bar truss floor bearing plate is obtained in the construction process, and the optimal anti-seismic performance of the floor slab is obtained in the using process.

In an embodiment of the present invention, the first reference surface, the second reference surface, the third reference surface, and the fourth reference surface form a cylinder with a triangular end surface. Specifically, the second reference surface, the third reference surface and the fourth reference surface form a cylinder with a triangular end face, the intersection line of the third reference surface and the fourth reference surface is on the first reference surface, and the first reference surface is parallel to the second reference surface.

In the embodiment of the invention, for the truss structure, the vibration frequency of a single steel bar is often higher than that of the whole truss, and in the construction stage, the triangular column body can be regarded as a hollow column body, and in the use stage, due to the interaction of concrete, the triangular column body can be regarded as a solid column body.

In the embodiment of the present invention, the construction condition parameters include minimum radii and maximum radii corresponding to the upper chord steel bar, the first lower chord steel bar, the second lower chord steel bar, the first web member steel bar and the second web member steel bar; a minimum design length and a maximum design length of the truss unit; a minimum distance and a maximum distance between the first reference surface and the second reference surface.

Further, the frequency is a vibration frequency of the truss unit, and the objective function of the optimization model includes a construction stage objective function and a use stage objective function, where the construction stage objective function may be represented by the following formula:

in the above-described formula, the first and second groups,in the form of frequency differential of the truss unit at the construction stage. Epsilon_iThe modulus of elasticity r corresponding to the upper chord steel bar, the first lower chord steel bar, the second lower chord steel bar, the first web member steel bar and the second web member steel bar in the truss unit_iThe radius, N, corresponding to the upper chord steel bar, the first lower chord steel bar, the second lower chord steel bar, the first web member steel bar and the second web member steel bar in the truss unit₁As a function of the shape of the truss elements at the construction stage, p_iThe corresponding densities of the upper chord steel bar, the first lower chord steel bar, the second lower chord steel bar, the first web member steel bar and the second web member steel bar in the truss unit. l is the length of the truss unit.

The constraint conditions in the construction stage are shown in the following formula:

r_imin≤r_i≤r_imax

l_min≤l≤l_max

dis_min≤dis(N₁₂,N₁₄)≤dis_max

in the above formula, r is_iminThe minimum radius corresponding to the upper chord steel bar, the first lower chord steel bar, the second lower chord steel bar, the first web member steel bar and the second web member steel bar in the truss unit is r_imaxThe maximum radius corresponding to the upper chord steel bar, the first lower chord steel bar, the second lower chord steel bar, the first web member steel bar and the second web member steel bar in the truss unit is provided. Above l_minFor minimum design length of truss unit, the above_minFor minimum design length of truss unit, /)_maxThe maximum design length of the truss unit. N is above₁₁As a function of the third reference plane of the truss element, N₁₃As a function of the fourth reference plane of the truss element, N₁₂As a function of the first reference plane of the truss element, N₁₄Is a function of the first reference plane of the truss element. In the embodiment of the invention, f is solved₁Thereby determining the above-mentioned a value, whereinA above_j、a_kIs an arbitrary reference coordinate (a) of the truss unit_j，a_k). Dis as described above_minIs the minimum distance, dis, between the first reference surface and the second reference surface_maxThe solving process can be calculated and solved through LINGO and MATLAB software, wherein the maximum distance between the first reference surface and the second reference surface is obtained.

The use phase objective function may be shown as follows:

wherein the content of the first and second substances,in the form of a frequency differential of the truss element at the stage of use. Epsilon is the modulus of elasticity corresponding to the concrete obtained by the truss unit, s is the thickness corresponding to the concrete obtained by the truss unit, N₂And p is a shape function corresponding to the concrete obtained by the truss unit in the construction stage, and is the density corresponding to the concrete obtained by the truss unit. l is the length of the truss unit.

The constraint conditions in the construction stage are shown in the following formula:

s_min≤s≤s_max

l_min≤l≤l_max

s_min≤dis(N₂₂,N₂₄)≤s_max

in the above formula, s is_minMinimum thickness of concrete obtained for truss elements, s_maxThe maximum thickness of the concrete obtained by the truss unit. As described abovel_minFor minimum design length of truss unit, the above_minFor minimum design length of truss unit, /)_maxThe maximum design length of the truss unit. N is above₂₁A third reference surface function corresponding to the concrete obtained for the truss unit, N₂₃A fourth reference surface function corresponding to the concrete obtained for the truss unit, N₂₂A first reference surface function corresponding to the concrete obtained for the truss unit, N₂₄And obtaining a first reference surface function corresponding to the concrete obtained by the truss unit. In the embodiment of the invention, f is solved₂Thereby determining the value of b, wherein b is as described above_j、b_kAs an arbitrary reference coordinate (b) of the truss unit_j，b_k). The solving process can be calculated and solved through LINGO and MATLAB software.

It should be noted that the concrete obtained by the truss unit is the solid column. Through the optimization, the steel bar truss structure with stronger shock resistance can be obtained by designing and processing the steel bar truss with the minimum vibration frequency.

Optionally, as shown in fig. 3, fig. 3 is a method for producing a steel bar truss floor deck according to another embodiment of the present invention, where the method further includes:

and S11, determining a first upper chord welding part of the first web member reinforcing steel bar according to the included angle between the first reference surface and the third reference surface, and welding the first upper chord welding part and the upper chord reinforcing steel bar.

And S12, determining a first bending angle of the first lower chord welding part of the first web member steel bar according to the included angle between the second reference surface and the third reference surface, and bending the first web member steel bar according to the first bending angle to obtain the first lower chord welding part.

And S13, welding the upper part of the first lower-chord welding part with the first lower-chord steel bar, and welding the lower part of the first lower-chord welding part with the bottom plate.

And S14, determining a second upper chord welding part of the second web member reinforcing steel bar according to the included angle between the first reference surface and the fourth reference, and welding the second upper chord welding part and the upper chord reinforcing steel bar.

And S15, determining a second bending angle of the second lower string welding part of the second web member steel bar according to the included angle between the second reference surface and the fourth reference surface, and bending the second web member steel bar according to the second bending angle to obtain a second lower string welding part.

And S16, welding the upper part of the second lower-chord welding part with the second lower-chord steel bar, and welding the lower part of the second lower-chord welding part with the bottom plate.

Optionally, the method further includes: welding the upper chord connecting rod with the upper chord steel bars of the plurality of truss units on site; and welding the lower chord connecting rod with the first lower chord reinforcing steel bars and the second lower chord reinforcing steel bars of the plurality of truss units on site.

In the embodiment of the invention, the connecting rod steel bars are welded on site, so that when the steel bar truss floor bearing plates are transported, the two steel bar truss floor bearing plates can be folded to form a structure similar to a staggered and superposed dog-tooth structure, and the transportation is convenient. The on-site welding of the connecting rod reinforcing steel bars can be spot welding.

Optionally, the method further includes: reinforcing the welding position of the upper chord connecting rod through a first steel bar project, wherein the first steel bar project comprises the upper chord connecting rod, the upper chord steel bar and the first upper chord welding part; and reinforcing the welding position of the lower chord connecting rod through a second steel bar project, wherein the second steel bar project comprises the lower chord connecting rod, the first lower chord welding part or the second lower chord welding part.

Optionally, the method further includes: forming the galvanized plate by a boss process to prepare the bottom plate; and processing splicing structures used for splicing two adjacent steel bar truss floor bearing plates at the edges of two sides of the bottom plate.

In the embodiment of the invention, the edge of the bottom plate forms the raised edge through a boss process, so that the raised edge can be provided with a corresponding split structure, and the split structure can be a reserved structure welded by bolts.

In the embodiment of the invention, a first reference surface, a second reference surface, a third reference surface and a fourth reference surface are determined according to a preset optimization model, wherein the preset optimization model takes the minimum frequency as an objective function and takes two-stage constraints of construction condition parameters and use condition parameters as constraint conditions; setting an upper chord steel bar according to the first reference surface, and setting a first lower chord steel bar and a second lower chord steel bar according to the second reference surface; winding and supporting the upper chord steel bars and the first lower chord steel bars through first web member steel bars on the third reference surface, and winding and supporting the upper chord steel bars and the second lower chord steel bars through second web member steel bars on the fourth reference surface to obtain a truss unit; connecting the truss units through connecting rod steel bars to obtain a truss; and fixedly arranging the truss on a bottom plate to obtain the steel bar truss floor bearing plate. Can just process the steel bar truss building carrier plate in advance before dispatching from the factory and make, reduce the installation work volume on scene, improve the on-the-spot installation effectiveness of steel bar truss building carrier plate. Meanwhile, each reference surface of the truss is based on a preset optimization model, the frequency minimum is taken as a target function, two-stage constraints of construction condition parameters and use condition parameters are taken as constraint conditions, and the truss has high anti-seismic performance no matter in the construction process or in the delivery and use of buildings, so that the quality of the corresponding buildings is improved.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.