Discussion on ultimate resistance formulas of high-strength bolts under tensile-shear coupling loading

作     者：Xin, Haohui Liu, Gao Zhang, Youyou Guo, Xiao Li, Jie Veljkovic, Milan 

作者机构：Southeast Univ Sch Civil Engn Nanjing 211189 Peoples R China State Key Lab Safety Durabil & Hlth Operat Long Sp Nanjing 211189 Peoples R China Xi An Jiao Tong Univ Dept Civil Engn Xian 710116 Peoples R China Guangxi Univ Guangxi Key Lab Disaster Prevent & Engn Safety Nanjing 530004 Peoples R China Guangxi Univ Coll Civil Engn & Architecture Nanjing 530004 Peoples R China Delft Univ Technol Fac Civil Engn & Geosci NL-2600AA Delft Netherlands 

出 版 物：《JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH》 (建筑钢材研究杂志)

年 卷 期：2024年第220卷

核心收录：

学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：Systematic Project of Guangxi Key Laboratory of Disaster Prevention and Engineering Safety [2022ZDK009] Qin Chuangyuan's "Scientist + Engineer" team construction project [2024QCY-KXJ-159] Science and Technology Plan of Xi'an City's "Scientist + Engineer" team construction project [2023JH- DWJS-0025] 

主　　题：High-strength bolts Ultimate resistance Influencing factors Numerical simulation Design specifications 

摘      要：Bolted connections are one of the key connection configurations in steel structures. The ductile fracture prediction is one of the challenges in the structural integrity evaluating of steel structures. To guarantee the safety of steel bridge in connections, an accurate assessment of the ultimate resistance of high-strength bolts under combined tensile-shear loads is necessary. However, the impacts of various parameters on high-strength bolts under combined tensile-shear loads are not sufficiently analysed in the existing references. Hence, in this paper, the validated mesoscale critical equivalent plastic strain (MCEPS) method is used to evaluate the ultimate resistance of high-strength bolts with different bolt grades, bolt diameters, bolt types, hole clearance, and preload force when the bolts are exposed to combined tensile-shear loading. The simulation results are compared to existing design specifications. Finally, the formula modifications in the existing design standards are proposed based on statistical analysis on numerical parametric results.