Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (2): 538-546.doi: 10.13229/j.cnki.jdxbgxb20210739

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Analysis of mechanical properties of stud shear connectors

Ya-chuan KUANG1(),Li-bin CHEN1,Chao-ju LI2,Yu-hao HE3   

  1. 1.School of Civil Engineering，Central South University，Changsha 410075，China
    2.Xuji Electric Co. ，Ltd. ，Xuchang 461001，China
    3.Changsha Hi -Tech Holding Group，Changsha 410221，China
  • Received:2021-08-04 Online:2023-02-01 Published:2023-02-28

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Abstract:

Based on the analysis of the stress mechanism and failure mode of stud shear connectors， the differential equation of the deflection line of stud shear connectors is established based on the theory of single pile under lateral load in elastoplastic foundation. According to mechanical characteristics in different stages of the stud shear connectors， the boundary conditions are introduced， the stud shear connectors of flexural differential is analyzed， and the calculation formulas of the shear bearing capacity， shear stiffness and elastic stage at the end of the slip value of the stud shear connectorscalculation formula are put forward. The load-slip tri-fold constitutive model of stud shear connectors is established, which has the characteristics of simple mathematical form and clear physical meaning. The results show that the calculated values of shear capacity， shear stiffness， elastic end slip and ultimate slip of stud shear connectors are 85.44 kN， 64.92 kN/mm， 0.64 mm and 6.13 mm respectively and the calculated values are in good agreement with the experimental values. The three-fold line load-slip relationship curve of stud shear connectors is close to the full-curve load-slip curve fitted by Buttry and Ollgaard， and it is in good agreement with the test load-slip curve of stud shear connectors.

Key words: structural engineering, steel-concrete composite beam, stud shear connector, elastic foundation beam, shear bearing capacity, the shear stiffness

CLC Number: 

  • TU398.9

Fig.1

Stress distribution diagram of stud connectors"

Fig.2

Force model of stud and force analysis of unit"

Fig.3

Schematic diagram of concrete elastoplastic zone"

Fig.4

Load-slip relationship of three broken lines"

Fig.5

Design drawing of the specimen"

Table 1

Comparison and analysis of calculation results of shear capacity of stud shear connectors"

项 目抗剪承载力/kN误差值/%
本文计算值85.4412.91
《钢结构设计标准》计算值56.3042.62
文献［9］计算值65.7732.96
文献［2］计算值80.4317.94
欧洲规范Eurocode4计算值51.4747.53
文献［15］试验值98.10-

Table 2

Comparison and analysis of calculation results of shear stiffness of stud shear connectors"

项 目抗剪刚度/（kN·mm-1）误差值/%
本文计算值64.9221.25
《钢结构设计标准》计算值56.3031.71
欧洲规范Eurocode4计算值64.7921.41
Oehlers公式计算值62.3624.36
文献［15］试验值82.44-

Table 3

Comparison and analysis of the calculated results of slip values of elastic ends of stud shear connectors"

项 目弹性末端 滑移值/mm误差值/%
本文计算值0.646.66
Oehlers公式计算值0.9660
文献［15］试验值0.60-

Table 4

Comparison and analysis of calculation results of ultimate slip value of stud shear connectors"

项 目极限滑移值/mm误差值/%
本文计算值6.1336.03
文献［9］计算值6.2534.83
文献［15］试验值9.59-

Fig.6

Load-slip curve comparison of stud shear connectors"

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