Study on force transmission mechanism and effective force transfer length of stud shear connectors

被引：0
|
作者：
Qi J. [1 ,2 ,3 ]
Cheng H. [1 ]
Cheng Z. [1 ,2 ]
Wang J. [1 ,2 ,3 ]
Li M. [4 ]
机构：
[1] Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing
[2] Bridge Engineering Research Center of Southeast University, Southeast University, Nanjing
[3] National Prestress Engineering Research Center, Southeast University, Nanjing
[4] Xuzhou Urban Rail Transit Co. Ltd., Xuzhou
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2023年 / 54卷 / 05期
基金：
中国国家自然科学基金;
关键词：
composite structures; effective force transfer length; push-out test; shear connector; stud;
D O I：
10.11817/j.issn.1672-7207.2023.05.023
中图分类号：
学科分类号：
摘要：
In order to study the force transfer mechanism of stud shear connectors and effective force transfer length in different concrete strength, push-out test with different stud lengths and refined finite element parametric analysis were carried out. Based on the refined numerical model, the force transfer mechanism of the studs and its surrounding concrete was analyzed, the concrete main stress trajectory was obtained, and the concrete force flow transfer path was revealed. The results show that the shear behavior of studs consists of two stages, namely elastic stage and plastic stage. Stud's length has little influence on the shear performance of the studs. The concrete can be divided into three zones, namely compression zone underneath the stud, compression-uplift zone above the stud and uplift zone underneath the stud. The stud effective force transfer length decreases as the concrete compressive strength increases. When the compressive strength of concrete is 20, 30, 40 and 50 MPa, the stud effective force length is 4.42d (d is the diameter of the stud), 4.00d, 3.68d and 3.42d. © 2023 Central South University of Technology. All rights reserved.
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页码：1894 / 1904
页数：10
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