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a shear bolt

A technology of shear studs and studs, which is applied in the direction of instruments, application of repeated force/pulsation force to test material strength, measuring devices, etc., can solve the problem of low shear bearing capacity, achieve material saving, simple improvement method, easy-to-operate effect

Active Publication Date: 2019-11-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low shear bearing capacity of existing studs under the action of reciprocating loads, and to provide a shear stud

Method used

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specific Embodiment approach 1

[0016] Specific embodiment 1: The shear stud of this embodiment includes a stud rod 2 and a cap 1, and a cap 1 is arranged on the top of the stud rod 2, and the diameter of the upper shaft 2-1 of the stud rod 2 is is d, the lower shaft 2-2 of the stud rod 2 is in the shape of a trumpet cone and the diameter of the shaft gradually increases with the axial direction downward of the stud rod, and the height of the lower shaft 2-2 of the stud rod 2 is 5d , The diameter of the bottom of the peg rod 2 is 2-2.5d, and the bottom of the peg rod 2 is also provided with a cylindrical bottom section 3 .

[0017] The peg rod, the peg cap and the bottom section of the cylinder described in this embodiment are integrally structured. Smooth rounded transition between upper shaft and lower shaft.

[0018] The shear studs in the steel-concrete composite structure of this embodiment design the optimization curve of the stud section diameter along the height through the finite element analysis, ...

specific Embodiment approach 2

[0021] Embodiment 2: This embodiment differs from Embodiment 1 in that the diameter of the peg rod 2 is 1.2-1.4d at the height of the lower shaft 2-2 of the peg rod 2 at a height of d.

specific Embodiment approach 3

[0022] Embodiment 3: This embodiment differs from Embodiment 2 in that the diameter of the peg rod 2 is 1.1-1.2d at the height of the lower shaft 2-2 of the peg rod 2 at a height of 3d.

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Abstract

The invention relates to pegs in steel-concrete composite structure, in particular to an anti-shear peg, and is intended to solve the problem that an existing peg has poor ant-wear bearing capacity during repeated loading. The anti-shear peg comprises a shank and a cap, the cap is arranged at the top of the shank, the diameter of the upper portion of the ant-shear peg is d, the lower portion of the shank is in the shape of a horn cone, the height of the lower portion of the shank is 5d, and the bottom diameter of the shank is 2-2.5 d and is also provided with a cylindrical bottom segment. The shape of the existing peg is modified, maximum stress of the peg is lowered, the yield limit anti-shear bearing capacity is improved under repeated loading effect, stress of a heat influencing area of a welding connector is reduced, stress of a heat-thermal influencing area of the welding connector is decreased, the shape of the shank is optimized so that plastic strain is transferred to a peg itself having good extensibility in a 4-time diameter range, and ultralow periodic fatigue under repeated loading action for the welding head is avoided.

Description

technical field [0001] The present invention relates to studs in steel-concrete composite structures. Background technique [0002] At present, as a common shear connector, studs are widely used in steel-concrete composite structures. Common studs mainly include two parts: studs and bolt caps. The commonly used welding method is stud welding, which is a high-pressure Fusion welding method. According to previous experimental research results and finite element analysis results, the shear bearing capacity provided by the studs is mainly determined by the studs and welded joints within 4 times the diameter of the connection between the studs and the plate (or pipe), among which The stress of the welded joint is the most concentrated and complex. The stress value of the stud within the range of 4 times the diameter is higher, and the stress beyond the range of 6 times the diameter is basically unchanged. [0003] According to the test results of the shear bearing capacity of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/04G01N3/32
CPCG01N3/04G01N3/32G01N2203/0005
Inventor 翟长海路冰张茂花李爽温卫平籍多发谢礼立
Owner HARBIN INST OF TECH
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