阅读说明：本技术 一种用于装配式楼梯的梯板低位隔震结构及施工方法 (Step plate low-position shock insulation structure for assembled stairs and construction method ) 是由 辛力 史生志 杨琦 曾凡生 于 2020-08-17 设计创作，主要内容包括：本发明涉及一种用于装配式楼梯的梯板低位隔震结构及施工方法,包括楼梯梯板以及与楼梯梯板低位端相连的隔震支座,且楼梯梯板与隔震支座预制成整体；隔震支座包括支座基体以及置于支座基体内的柔性变形体；柔性变形体包括隔震橡胶和设在隔震橡胶周围的预留变形区；隔震橡胶上表面处和下表面处分别设置钢板；楼梯梯板低位端与柔性变形体上表面处的钢板相连；还包括梯梁连接钢筋；梯梁连接钢筋一端置于隔震支座内且通过紧固件与隔震橡胶下表面处的钢板相连,并与隔震支座预制成整体；梯梁连接钢筋另一端置于隔震支座外部。本发明节点连接更加简单、装配速度快、稳定性好,装配式楼梯的梯板低位隔震结构装配在梯梁之间,隔震性能高。(The invention relates to a stair tread low-position shock insulation structure for an assembled stair and a construction method, wherein the stair tread low-position shock insulation structure comprises a stair tread and a shock insulation support connected with the low-position end of the stair tread, and the stair tread and the shock insulation support are prefabricated into a whole; the shock insulation support comprises a support base body and a flexible deformation body arranged in the support base body; the flexible deformation body comprises shock insulation rubber and a reserved deformation area arranged around the shock insulation rubber; steel plates are respectively arranged on the upper surface and the lower surface of the shock insulation rubber; the lower end of the stair tread is connected with a steel plate on the upper surface of the flexible deformation body; the ladder beam connecting steel bar is also included; one end of the ladder beam connecting steel bar is arranged in the shock insulation support and is connected with the steel plate on the lower surface of the shock insulation rubber through a fastener, and the ladder beam connecting steel bar and the shock insulation support are prefabricated into a whole; the other end of the ladder beam connecting steel bar is arranged outside the shock insulation support. The joint connection of the invention is simpler, the assembly speed is fast, the stability is good, the low-level shock insulation structure of the step plate of the assembled stair is assembled between the step beams, and the shock insulation performance is high.)

1. The utility model provides a step low level shock insulation structure for assembled stair which characterized in that: the stair plate low-position shock insulation structure for the assembled stair comprises a stair plate (8) and a shock insulation support connected with the low-position end of the stair plate, and the stair plate (8) and the shock insulation support are prefabricated into a whole; the shock insulation support comprises a support base body and a flexible deformation body (1) arranged in the support base body; the flexible deformation body (1) comprises shock insulation rubber (2) and a reserved deformation area arranged around the shock insulation rubber (2); steel plates (3) are respectively arranged on the upper surface and the lower surface of the shock insulation rubber (2); the low-position end of the stair tread is connected with a steel plate (3) on the upper surface of the flexible deformation body (1) through a connecting assembly.

2. The step plate low-level seismic isolation structure for fabricated staircases as claimed in claim 1, wherein: the connecting assembly comprises a fastener (4) and a ladder plate connecting steel bar (5); one end of the stair board connecting steel bar (5) is arranged in the lower end of the stair board; the other end of the ladder board connecting steel bar (5) is fixed with a steel plate (3) on the upper surface of the shock insulation rubber (2) through a fastener (4).

3. The step plate low-level seismic isolation structure for fabricated staircases as claimed in claim 2, wherein: the ladder plate connecting steel bar (5) comprises a horizontal section and an inclined section; the horizontal section is fixed with the steel plate (3) through a fastener (4); the inclined section is arranged in the stair tread (8).

4. The step plate low-level seismic isolation structure for fabricated staircases as claimed in claim 3, wherein: the included angle between the inclined section and the horizontal plane is equal to the inclined angle of the stair tread (8).

5. The step plate low-level seismic isolation structure for fabricated staircases as claimed in claim 4, wherein: the ladder plate low-position shock insulation structure for the assembled stair further comprises ladder beam connecting steel bars (6); one end of the ladder beam connecting steel bar (6) is arranged in the shock insulation support and is connected with the steel plate (3) on the lower surface of the shock insulation rubber (2) through a fastener (4); the other end of the ladder beam connecting steel bar (6) is arranged outside the shock insulation support; the ladder beam connecting steel bar (6) arranged in the shock insulation support is prefabricated with the shock insulation support into a whole.

6. The step plate low-level seismic isolation structure for fabricated staircases as claimed in claim 5, wherein: the fastener (4) is a bolt or an anchor bar.

7. The step plate low-level seismic isolation structure for fabricated staircases as claimed in claim 6, wherein: the diameter of the fastening piece (4) is more than or equal to 8mm, and the height of the fastening piece (4) is more than or equal to 80 mm.

8. A construction method of a step low-position seismic isolation structure for an assembled stair based on any one of claims 1 to 7, wherein the construction method comprises the following steps: the construction method comprises the following steps:

1) the step plate low-position shock insulation structure of the fabricated staircase according to claim 1 is arranged between a high-position staircase beam (9) and a low-position staircase beam (10), a staircase step plate (8) is connected with the high-position staircase beam (9), and a shock insulation support is connected with the low-position staircase beam (10);

2) concrete is poured in the peripheral areas of the shock insulation support and the low-position stair beam (10);

3) the construction is accomplished in concrete curing shaping, and stair step board (8), isolation bearing and low level stair step roof beam (10) form the frame construction that concrete and reinforcing bar combined together, and isolation rubber (2) play the stabilizing effect with reserving the deformation zone to the stair.

9. The construction method of the step-plate low-level seismic isolation structure for the fabricated stairway as claimed in claim 8, wherein: the concrete realization process of the step 1) is that one end of the ladder beam connecting steel bar (6) arranged outside the shock insulation support is arranged in the low-position stair beam (10) and connected with the low-position stair beam (10); the horizontal length of the ladder beam connecting steel bar (6) extending out of the seismic isolation support is 300-600 mm.

10. The construction method of the step-plate low-level seismic isolation structure for the fabricated stairway as claimed in claim 8, wherein: in the step 3), the rubber shear modulus G of the shock insulation rubber (2) is more than or equal to 0.4MPa and less than or equal to 0.6MPa, the ultimate tensile stress of the rubber is more than or equal to 1.5MPa, and the ultimate compressive stress of the rubber is more than or equal to 90 MPa; the reserved deformation area is filled with flexible deformation materials; the ultimate compressive strength of the flexible deformation material is less than 0.2MPa, and the uniaxial ultimate compressive strain of the flexible deformation material is not less than 80%.

Technical Field

The invention belongs to the technical field of building construction, relates to a shock insulation support, and particularly relates to a step plate low-position shock insulation structure for an assembled stair and a construction method.

Background

In the structure of the plate type stair, the stair increases the space rigidity of the whole structure, in the design of the traditional frame structure stair, the stair plates of the plate type stair are generally designed only according to one-way bending components, but the middle plates are used as oblique supporting components to bear axial force and shearing force under the action of earthquake, so that the stress of the joints of the stair plates and the stair beams is large. Generally, a support is required to be arranged between the upper-layer ladder plate and the lower-layer ladder beam for releasing the shearing force and the bending moment, reducing the stress of the ladder plate and playing a role in resisting earthquake. Currently, the current practice is. The mounting mode of the stair earthquake-resistant support is usually an assembly type structure which mainly comprises concrete and a steel structure, the assembly type concrete structure is the key point of the industrial development of buildings, but the technical level of the structure has the defects of limited building types, low assembly rate, complex node connection and poor earthquake-resistant performance; the steel structure is processed in factories, installed on site, has higher industrialization degree and high construction and maintenance cost. Therefore, a new stair seismic isolation method is required.

Disclosure of Invention

Aiming at the technical problems of the existing stair shock insulation support, the invention provides a step plate low-position shock insulation structure for an assembled stair and a construction method, wherein the construction joint connection is simpler, the assembly speed is high, an integrated step plate with the step plate low-position shock insulation structure and a lower step beam form a concrete and steel bar combined frame structure, the shock resistance fortification intensity can reach 6-8 degrees, and the shock insulation performance is high.

In order to achieve the purpose, the invention adopts the technical scheme that:

a step plate low-position shock insulation structure for an assembled stair comprises a stair step plate and a shock insulation support connected with the low-position end of the stair step plate, wherein the stair step plate and the shock insulation support are prefabricated into a whole; the shock insulation support comprises a support base body and a flexible deformation body arranged in the support base body; the flexible deformation body comprises shock insulation rubber and a reserved deformation area arranged around the shock insulation rubber; steel plates are respectively arranged on the upper surface and the lower surface of the shock insulation rubber; the low-position end of the stair tread is connected with a steel plate on the upper surface of the flexible deformation body through a connecting assembly.

Further, the connecting assembly comprises a fastener and a ladder connection steel bar; one end of the stair tread connecting steel bar is arranged in the low end of the stair tread; the other end of the ladder board connecting steel bar is fixed with a steel plate on the upper surface of the shock insulation rubber through a fastener.

Further, the step connecting steel bar comprises a horizontal section and an inclined section; the horizontal section is fixed with the steel plate through a fastener; the inclined section is arranged in the stair tread.

Furthermore, the included angle between the inclined section and the horizontal plane is equal to the inclined angle of the stair tread.

Furthermore, the ladder plate low-position shock insulation structure for the assembled stairway also comprises ladder beam connecting steel bars; one end of the ladder beam connecting steel bar is arranged in the shock insulation support and is connected with the steel plate on the lower surface of the shock insulation rubber through a fastener; the other end of the ladder beam connecting steel bar is arranged outside the shock insulation support; the ladder beam connecting steel bars arranged in the shock insulation support are prefabricated into a whole with the shock insulation support.

Further, the fastener is a bolt or an anchor bar.

Furthermore, the diameter of the fastening piece is more than or equal to 8mm, and the height of the fastening piece is more than or equal to 80 mm.

A construction method based on a step plate low-position shock insulation structure for an assembled stair comprises the following steps:

1) the method comprises the following steps that a step plate low-position shock insulation structure of the assembled stair is arranged between a high-position stair beam and a low-position stair beam, a stair plate is connected with the high-position stair beam, and a shock insulation support is connected with the low-position stair beam;

2) concrete is poured in the peripheral areas of the shock insulation support and the low-position stair beam;

3) the construction is accomplished in the concrete curing shaping, and stair step board, isolation bearing and low-order stair step roof beam form the frame construction that concrete and reinforcing bar combined together, and isolation rubber plays the stabilizing effect to the stair with reserving the deformation zone.

Further, the concrete implementation process of the step 1) is that one end of the ladder beam connecting steel bar, which is arranged outside the shock insulation support, is arranged in the low-position stair beam and is connected with the low-position stair beam; the horizontal length of the ladder beam connecting steel bar extending out of the seismic isolation support is 300-600 mm.

Further, in the step 3), the rubber shear modulus G of the shock insulation rubber is more than or equal to 0.4MPa and less than or equal to 0.6MPa, the ultimate tensile stress of the rubber is more than or equal to 1.5MPa, and the ultimate compressive stress of the rubber is more than or equal to 90 MPa; the reserved deformation area is filled with flexible deformation materials; the ultimate compressive strength of the flexible deformation material is less than 0.2MPa, and the uniaxial ultimate compressive strain of the flexible deformation material is not less than 80%.

The invention has the beneficial effects that:

1. the invention comprises a stair tread and a shock insulation support connected with the lower end of the stair tread, wherein the stair tread and the shock insulation support are prefabricated into a whole through concrete; the shock insulation support comprises a support base body and a flexible deformation body arranged in the support base body; the flexible deformation body comprises shock insulation rubber and a reserved deformation area arranged around the shock insulation rubber; steel plates are respectively arranged on the upper surface and the lower surface of the shock insulation rubber; the low-position end of the stair tread is connected with the steel plate on the upper surface of the flexible deformation body through the connecting component. The shock insulation support and the low-position end precast concrete of stair step board become whole, and fixed with low-position stair step roof beam again, in the work progress, the nodal connection is simpler, and the installation assembly is convenient.

2. The invention relates to a ladder plate low-position shock insulation structure for an assembled stair, which also comprises ladder beam connecting steel bars; one end of the ladder beam connecting steel bar is arranged in the shock insulation support and is connected with the steel plate on the lower surface of the shock insulation rubber through a fastener; the other end of the ladder beam connecting steel bar is arranged outside the shock insulation support; the ladder beam connecting steel bars arranged in the shock insulation support are prefabricated into a whole with the shock insulation support. Adopt ladder roof beam connecting reinforcement to fix the step board low level shock insulation structure of assembled stair with low level stair ladder roof beam, then with concrete placement, form the frame construction that concrete and reinforcing bar combined together, can improve the anti-seismic performance of stair.

3. According to the invention, the rubber shear modulus G of the shock insulation rubber is not less than 0.4MPa and not more than 0.6MPa, the ultimate tensile stress of the rubber is not less than 1.5MPa, and the ultimate compressive stress is not less than 90 MPa; after the precast concrete shock insulation structure is fixed with the low-position stair beam, when the seismic fortification intensity reaches 6-8 degrees, the precast concrete shock insulation structure can have good shock resistance, and the safety of the stair is ensured.

4. According to the invention, the flexible deformation body comprises the shock insulation rubber and the reserved deformation area arranged around the shock insulation rubber, wherein the reserved deformation area is filled with the flexible deformation material, the ultimate compressive strength of the flexible deformation material is less than 0.2MPa, the uniaxial ultimate compressive strain of the flexible deformation material is not less than 80%, the flexible deformation body is an L-shaped body, the ladder plate and the ladder beam can be enabled to horizontally dislocate without being influenced by a building surface layer, and the stability is better.

Drawings

FIG. 1 is a schematic view of a precast concrete seismic isolation structure according to embodiment 1 of the present invention;

FIG. 2 is a schematic view of the precast concrete seismic-isolated structure of example 1 in stair installation;

FIG. 3 is a schematic front view of the prefabricated concrete seismic isolation structure of example 1 applied to a staircase;

FIG. 4 is a schematic top view of the prefabricated concrete seismic isolation structure of example 1 applied to a staircase;

FIG. 5 is a schematic view of a precast concrete seismic isolation structure according to embodiment 2 of the present invention;

fig. 6 is a schematic view of the precast concrete seismic-isolated structure of example 2 in stair installation;

wherein:

1-a flexible deformable body; 2-shock insulation rubber; 3-a steel plate; 4-a fastener; 5, connecting the reinforcing steel bars with the ladder boards; 6, connecting reinforcing steel bars with the ladder beam; 7, constructing a steel bar; 8, stair treads; 9-high stair beam; 10-low stair beam.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings and examples.