阅读说明：本技术 一种二阶段受力栓钉组及其施工方法 (Two-stage stress bolt group and construction method thereof ) 是由 杨勇 陈辛 张树琛 杨仕聪 张松 于 2021-09-30 设计创作，主要内容包括：一种二阶段受力栓钉组,由沿被焊物轴线焊接于被焊物上的一个普通栓钉和一个抗拔不抗剪栓钉组成,所述普通栓钉由栓钉杆一和栓钉帽一构成,所述抗拔不抗剪栓钉由栓钉杆二、套在栓钉杆二外部的套管、栓钉帽二和套在栓钉帽二外的套环构成。本发明还提供了其施工方法,本发明二阶段受力,施工便捷,使用灵活,可持续,免修复,成本低。(A two-stage stressed stud group comprises a common stud and an anti-pulling and non-shearing stud, wherein the common stud is welded on a welded object along the axis of the welded object and consists of a stud rod I and a stud cap I, and the anti-pulling and non-shearing stud consists of a stud rod II, a sleeve sleeved outside the stud rod II, a stud cap II and a sleeve ring sleeved outside the stud cap. The invention also provides a construction method thereof, and the invention has two-stage stress, convenient construction, flexible use, sustainability, no repair and low cost.)

1. The two-stage stress stud group is characterized by consisting of a common stud (1) and a pulling-resistant and non-shearing-resistant stud (2) which are welded on a welded object (3) along the axis of the welded object (3), wherein the common stud (1) consists of a stud rod I (1-1) and a stud cap I (1-2), and the pulling-resistant and non-shearing-resistant stud (2) consists of a stud rod II (2-1), a sleeve pipe (2-2) sleeved outside the stud rod II (2-1), a stud cap II (2-3) and a sleeve ring (2-4) sleeved outside the stud cap II (2-3).

2. The two-stage force bolt group according to claim 1, characterized in that the diameter of the bolt rod I (1-1) is the same as that of the bolt rod II (2-1), and the distance between the common bolt (1) and the anti-pulling and non-shearing bolt (2) is not less than six times the diameter of the bolt rod.

3. The two-stage force bolt group according to claim 1, characterized in that when a plurality of bolt groups are welded on the welded object (3), one anti-pulling and non-shearing bolt (2) is arranged between two adjacent common bolts (1).

4. Set of two-stage force bolts according to claim 1, characterized in that the material of the sleeve (2-2) and the collar (2-4) is a low modulus of elasticity material.

5. The two-stage force stud set of claim 4, wherein the low-modulus of elasticity material is a foam, EVA foam, synthetic sponge, or low-modulus of elasticity rubber.

6. The two-stage stressed bolt group according to claim 1, wherein the inner diameter of the sleeve (2-2) is the same as the diameter of the bolt rod II (2-1), the thickness of the tube wall is 1-5 mm, the height of the sleeve is 3-10 mm lower than the height of the bolt rod II (2-1), the inner diameter of the lantern ring (2-4) is the same as the diameter of the bolt cap II (2-3), the thickness of the ring wall is 1-5 mm, and the height of the lantern ring is the same as the height of the bolt cap II (2-3).

7. The set of two-stage force-bearing bolts according to claim 1, wherein the welded object (3) is a steel section, a steel plate or a steel pipe.

8. The construction method of the two-stage forced bolt set according to claim 1, characterized by comprising the steps of:

step 1, welding a common stud (1) and a pulling-resistant and non-shearing-resistant stud (2) to a welded object (3);

the welding method of the anti-pulling and non-shearing stud (2) comprises the following steps:

firstly, penetrating a sleeve (2-2) into a bolt rod II (2-1) from the bottom of the bolt rod II (2-1) and integrally sleeving the bolt rod II (2-1);

secondly, turning the sleeve (2-2) sleeved outside the bolt rod II (2-1) from bottom to top at the position 1/3 at the lower part of the height of the sleeve to reserve a space for a ceramic ring used for welding;

thirdly, arc stud welding is carried out by adopting a stud welding machine, a welding gun clamps the stud cap II (2-3) and tightly pushes the porcelain ring, and the stud rod II (2-1) is welded on the surface of the welded object (3).

Fourthly, the sleeve (2-2) which is folded to 1/3 degrees in height is folded back to be cylindrical, and the bolt rod II (2-1) is completely wrapped;

fifthly, sleeving the lantern ring (2-4) on the bolt cap II (2-3);

and 2, after all the stud groups are welded, pouring concrete (4) in the die, and pouring the stud groups in the die.

Technical Field

The invention belongs to the technical field of building structures, relates to a combined structure, and particularly relates to a two-stage stress bolt group.

Background

The combined structure can make the best use of the things, the steel beam which is easy to destabilize under compression is placed in the tension area, and the concrete which is easy to crack under tension is placed in the compression area, so that the advantages of steel tensile strength and concrete compression resistance can be fully exerted, and the effect of reducing the structure cost and improving the performance is realized through the combination of the steel tensile strength and the concrete compression resistance. However, the shear connectors are required to be arranged between the steel beam and the concrete to transfer the horizontal shearing force and the vertical lifting force of the interface, so that the combination effect is realized. Since the stud is a flexible shear connector, the bearing capacity is not reduced when a certain slip occurs between the concrete slab and the steel beam. Meanwhile, the method has the advantages of simple manufacturing process, convenience and quickness in construction, isotropy, convenience in field welding and the like, and is widely applied to actual engineering.

The composite structure is able to perform its superior performance under normal design and use conditions. However, when the structure is subjected to extreme accidental loads such as rare earthquakes, overloading, impact, explosion and the like, the shear force borne by the bolt in the combined component and the generated slippage exceed the normal level, once the bolt breaks and fails, the separation of different components of the component in the combined structure can be caused, and disastrous results such as beam falling, overturning, collapsing and the like can be caused.

Disclosure of Invention

In order to overcome the disadvantages of the prior art, the invention aims to provide a two-stage stress bolt group, which realizes two-stage stress of a bolt by combining a common bolt and a pulling-resistant and shearing-resistant bolt, wherein the pulling-resistant and shearing-resistant bolt is used as a bearing capacity reserve. The pullout resistant non-shear studs function when subjected to extreme loads, thereby improving the resistance of the structure to extreme incidental loads. In the normal use stage, the common stud is stressed to slide, the sleeve and the lantern ring of the uplift-resistant and non-shear-resistant stud are stressed to generate compression deformation, and the internal stud is not stressed. When the sliding of the common stud reaches a certain degree, the anti-pulling and non-shearing stud begins to bear force, so that a secondary ascending section appears on a load-sliding curve of the whole stud group, the bearing capacity and the sliding are increased, and the effect of two-stage stress of the stud group is realized. The two-stage stress bolt group can be adopted at important parts in ultrahigh, large-span, heavy-load and complex structures to improve the collapse resistance of the structure in an extreme environment. After extreme load passes, the pulling-resistant and non-shearing-resistant stud can replace a common stud to continue stress, so that the structure is free from being dismantled and rebuilt, and the green sustainable development of the building is realized.

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

a two-stage stressed stud group comprises a common stud and an anti-pulling and non-shearing stud, wherein the common stud is welded on a welded object along the axis of the welded object and consists of a stud rod I and a stud cap I, and the anti-pulling and non-shearing stud consists of a stud rod II, a sleeve sleeved outside the stud rod II, a stud cap II and a sleeve ring sleeved outside the stud cap.

In one embodiment, the diameter of the first pin rod is the same as that of the second pin rod, and the distance between the common pin and the anti-pulling and non-shearing pin is not less than six times the diameter of the pin rods.

In one embodiment, when a plurality of bolt groups are welded on the welded object, one anti-pulling and non-shearing bolt is arranged between two adjacent common bolts.

In one embodiment, the material of the sleeve and collar is a low modulus of elasticity material.

In one embodiment, the low modulus of elasticity material is a foam, EVA foam, synthetic sponge, or low modulus of elasticity rubber.

In one embodiment, the inner diameter of the sleeve is the same as the diameter of the second stud rod, the thickness of the tube wall is 1-5 mm, the height of the sleeve is 3-10 mm lower than the height of the second stud rod, the inner diameter of the sleeve ring is the same as the diameter of the second stud cap, the thickness of the ring wall is 1-5 mm, and the height of the sleeve ring is the same as the height of the second stud cap.

In one embodiment, the welded object is a steel section, a steel plate or a steel pipe.

The invention also provides a construction method of the two-stage stress bolt group, which comprises the following steps:

step 1, welding common studs and uplift-resistant and non-shear-resistant studs to a welded object;

the welding method of the anti-pulling and non-shearing stud comprises the following steps:

firstly, penetrating a sleeve into a bolt rod II from the bottom of the bolt rod II, and integrally sleeving the sleeve outside the bolt rod II;

secondly, turning the sleeve sleeved outside the stud rod from bottom to top at the position 1/3 on the lower part of the stud rod to reserve a space for a ceramic ring used for welding;

thirdly, arc stud welding is carried out by adopting a stud welding machine, a welding gun clamps the stud cap II and tightly pushes the porcelain ring, and the stud rod II is welded on the surface of the welded object.

Fourthly, turning the sleeve turned to 1/3 degrees back to be cylindrical, and completely wrapping the bolt rod II;

sleeving the lantern ring on the bolt cap II;

and 2, pouring concrete in the formwork after all the stud groups are welded, and pouring the stud groups in the formwork.

Compared with the prior art, the invention has the beneficial effects that:

the invention has the following advantages:

(1) two stages are stressed. As shown in fig. 4, the peg set has greater resistance and deformability under extreme conditions than conventional pegs. The uplift-resistant and non-shear-resistant stud is used as bearing capacity storage, when the stress and deformation of the common stud reach a certain degree, the thickness of the sleeve and the sleeve ring of the uplift-resistant and non-shear-resistant stud is extruded, and the inner stud plays a role after contacting the concrete. The load-slip curve is raised for the second time, the shearing bearing capacity and the slip of the bolt group are increased, and the increased shearing force and deformation under the extreme load condition can be resisted. The load-slip curve of the two-stage stressed bolt group can be adjusted by adjusting the thicknesses of the sleeve and the sleeve ring.

(2) The construction is convenient. The construction method of the common stud and the uplift-resistant and non-shear-resistant stud is the same, and stud welding machines are adopted for welding. The sleeve is sleeved on the bolt rod and turned over before the anti-pulling and non-shearing bolt is welded, after the welding is finished, the sleeve is only required to be turned over into a pipe shape, and the sleeve ring at the bolt cap is installed, so that the construction is simple and convenient.

(3) The use is flexible. Two-stage stressed bolt groups can be arranged at local important positions to serve as bearing capacity storage, and common bolts can be used at other parts.

(4) Can be sustained without repair. After accidental extreme load takes place, ordinary peg breaks off, and the resistance to plucking peg that does not shear can still replace ordinary peg to play a role to make the structure can continue to bear, exempt from the restoration, realize green sustainable building development theory.

(5) The cost is low. Compared with the common stud, the anti-pulling and non-shearing stud only needs to add the sleeve and the lantern ring made of the low-elasticity-modulus material, and the cost increment is negligible.

Drawings

Fig. 1 is a perspective view illustrating a two-stage force stud set according to the present invention when applied to a composite beam.

Fig. 2 is an enlarged view of the area a in fig. 1.

Fig. 3 is a perspective view of a common peg in the two-stage force-bearing peg group shown in fig. 1.

Fig. 4 is an assembled perspective view of the uplift and non-shear resistant peg in the two-stage stressed peg group shown in fig. 1.

FIG. 5 is a schematic view of the load-slip curve of the two-stage force-bearing stud set of the present invention.

Fig. 6 is a perspective view of the two-stage force stud set of the present invention in use with a profiled steel sheet.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the drawings and examples.

As shown in figures 1 and 2, the invention is a two-stage forced bolt group, each bolt group consists of a common bolt 1 and a pulling-resistant and shearing-resistant bolt 2 which are welded on an object to be welded 3 along the axis of the object to be welded 3.

For example, when a plurality of stud groups are welded on the object to be welded 3, two studs are arranged at intervals, namely, one anti-pulling and non-shearing stud 2 is arranged between two adjacent common studs 1 at intervals.

Referring to fig. 3, a conventional peg 1 is composed of a peg rod 1-1 and a peg cap 1-2, which are commercially mature molded products.

Referring to fig. 4, the anti-pulling and non-shearing toggle pin 2 is composed of a toggle pin rod II 2-1, a sleeve 2-2 sleeved outside the toggle pin rod II 2-1, a toggle pin cap II 2-3 and a sleeve ring 2-4 sleeved outside the toggle pin cap II 2-3. Illustratively, the material of the sleeve 2-2 and collar 2-4 is a low modulus of elasticity material, such as foam, EVA foam, synthetic sponge, or low modulus of elasticity rubber.

In one embodiment, the diameter of the stud rod I1-1 is the same as that of the stud rod II 2-1, and the distance between the common stud 1 and the uplift and non-shear resistant stud 2 is not less than six times of the diameter of the stud rod according to the requirements of the Steel Structure design Standard GB 50017 plus 2017.

In one embodiment, the inner diameter of the sleeve 2-2 is the same as the diameter of the pin rod two 2-1, the thickness of the tube wall is 1-5 mm, the height is 3-10 mm lower than the height of the pin rod two 2-1, and the height of the pin rod two 2-1 is reduced due to the melting of the root of the pin during welding. The inner diameter of the lantern ring 2-4 is the same as the diameter of the stud cap II 2-3, the thickness of the wall of the lantern ring is 1-5 mm, and the height of the lantern ring is the same as the height of the stud cap II 2-3.

In one embodiment, the welded object 3 is a steel section, a steel plate, or a steel pipe.

According to the structure of the invention, in the normal use stage, the common stud 1 bears shearing force to generate slippage, while the sleeve 2-2 and the lantern ring 2-4 of the uplift-resistant and non-shearing-resistant stud 2 are stressed to generate compression deformation, and the stud in the sleeve 2-2 and the lantern ring 2-4 is used as bearing capacity storage and is not stressed. As shown in fig. 5, the peg set has greater resistance and deformability in extreme conditions than the conventional peg 1.

When extreme accidental loads such as rare earthquakes, overloading, impact, explosion and the like are encountered, the pulling-resistant and non-shearing-resistant stud 2 starts to bear force after the slippage of the common stud 1 reaches a certain degree, so that a secondary ascending section appears on a load-slippage curve of the whole stud group, the bearing capacity and slippage are increased, and the resistance capacity of the structure under the action of the extreme accidental loads is improved. The method has the advantages of two-stage stress, convenience and quickness in construction, flexibility in use, low cost and the like. The two-stage stress bolt group can be adopted at important parts in ultrahigh, large-span, heavy-load and complex structures to improve the anti-overturning and anti-collapsing capability of the structures in extreme environments. After extreme accidental load passes, the uplift-resistant and non-shear-resistant stud 2 can replace the common stud 1 to continue to bear force, so that the structure is free from being dismantled and rebuilt, and the green sustainable development of the building is realized. The composite structure is particularly suitable for bridges and industrial and civil buildings.

The invention also provides a construction method of the two-stage stress bolt group, which comprises the following steps:

step 1, welding a common stud 1 and a pulling-resistant and non-shearing-resistant stud 2 to an object to be welded 3 in a mode of arc stud welding and the like;

the welding method of the anti-pulling and non-shearing stud 2 comprises the following steps:

firstly, penetrating a sleeve 2-2 into a bolt rod II 2-1 from the bottom II 2-1 of the bolt rod, and integrally sleeving the bolt rod II 2-1;

secondly, turning the sleeve 2-2 sleeved outside the bolt rod II 2-1 from bottom to top at the position 1/3 on the lower part of the height of the sleeve, and reserving a space for a ceramic ring for welding;

thirdly, arc stud welding is carried out by adopting a stud welding machine, a welding gun clamps the stud cap II 2-3 and tightly pushes the porcelain ring, and the stud rod II 2-1 is welded on the surface of the welded object 3.

Fourthly, the sleeve 2-2 with the height of 1/3 is folded back to be cylindrical, and the bolt rod II 2-1 is completely wrapped;

fifthly, sleeving the lantern ring 2-4 on the bolt cap II 2-3;

and 2, erecting a formwork and pouring concrete 4 after all the stud groups are welded.

In the structure shown in fig. 1 and 6, the welded object 3 is a section steel beam and a profiled steel sheet, respectively.

The invention creatively combines the common stud and the pulling-resistant and non-shearing-resistant stud to form a two-stage stressed stud group, increases the shearing bearing capacity and improves the deformation capacity, so that the structure has higher resistance under the action of extreme accidental loads, and the catastrophic consequences of beam falling, overturning, collapsing and the like of the combined structure can be avoided. The load-slip curve of the two-stage stressed bolt group can be further adjusted by adjusting the thicknesses of the sleeve and the lantern ring, so that the optimal design of the embodiment is realized.