Finite Element Analysis on Shear Behavior of High-Strength Bolted Connectors under Inverse Push-Off Loading

Wei Wang, Xie-dong Zhang, Fa-xing Ding and Xi-long Zhou
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Wei Wang: School of Transportation, Wuhan University of Technology, Wuhan 430063, China
Xie-dong Zhang: School of Transportation, Wuhan University of Technology, Wuhan 430063, China
Fa-xing Ding: School of Civil Engineering, Central South University, Changsha 410075, China
Xi-long Zhou: CCCC Second Highway Consultants Co., LTD., Wuhan 430056, China

Energies, 2021, vol. 14, issue 2, 1-15

Abstract: High-strength bolted shear connectors (HSBSCs), which can be demounted easily and efficiently during deconstruction, are recommended to replace the conventional steel studs in steel–concrete composite beams (SCCBs) to meet the requirements of sustainable development. The existing investigations on the behavior of HSBSCs mainly focus on the positive moment area of composite beams, in which the concrete slab is in compress condition. In this paper, a three-dimensional finite element model (FEM) was developed to investigate the performance of HSBSCs subjected to inverse push-off loading. Material nonlinearities and the interactions among all components were included in the FEM. The accuracy and reliability of the proposed FEM were initially validated against the available push-off test results. Load-carrying capacity and load–slip response of the HSBSCs under inverse push-off loading were further studied by the verified FEM. A parametric study was carried out to determine the influence of the concrete strength, the diameter and tensile strength of bolt and the clearance between the concrete slab and the bolt as well as the bolt pretension on the shear performance of HSBSCs. Based on the extensive parametric analyses, design recommendations for estimating the shear load at the first slip and load-bearing resistance of HSBSCs were proposed and verified.

Keywords: high-strength bolt shear connector; push-off test; FEM; concrete under tension; shear bearing capacity (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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