建筑结构学报2025，Vol.46Issue(4)：117-128,12.DOI:10.14006/j.jzjgxb.2024.0248
阶梯型梁柱拼接节点抗震性能及恢复力模型研究
Research on seismic performance and hysteretic model of stepped beam-column splicing joints
摘要
Abstract
The configuration of beam-column joints affects the load transfer characteristics,seismic performance,and installation efficiency of prefabricated steel structures.To meet the mechanical performance and installation efficiency requirements in engineering,a stepped beam-column splicing joint with flush beam flanges was proposed.Three joints with different connection configurations were designed and were subjected to cyclic loading tests.The failure modes,hysteresis curves,skeleton curves,ductility,and energy dissipation of the specimens were discussed.Based on the test results,a FE model validated through experimental data was established using ABAQUS software.Parametric analysis was performed using the proposed model with the cantilever length as a variable.The results indicate that the ultimate bending moment of the joint exceeds the full plastic bending moment of the beam section.The joint exhibits a rotation ductility coefficient exceeding 3.5 in the positive direction,with excellent energy dissipation performance evident from the well-defined hysteresis curves.Increasing the height of the stepped segment and the length of the cantilever segment can effectively enhance the seismic performance of the joint.Considering the asymmetry characteristics of the joint,the Bouc-Wen model was improved,and quantum particle swarm optimization algorithm was used to identify the parameters for the model,establishing the hysteretic model.The results show that the improved Bouc-Wen model can accurately simulate the degradation and asymmetry characteristics of the hysteresis curves for joints.关键词
装配式钢结构/阶梯型梁柱节点/有限元分析/抗震性能/修正Bouc-Wen模型Key words
prefabricated steel structure/stepped beam-column joint/FE analysis/seismic performance/modified Bouc-Wen model分类
土木建筑引用本文复制引用
程欣,李赟,安毅,刘鹏基,孙峻枫..阶梯型梁柱拼接节点抗震性能及恢复力模型研究[J].建筑结构学报,2025,46(4):117-128,12.基金项目
山西省基础研究计划优秀青年培育项目(202103021222007),中国博士后科学项目(2021M692862). （202103021222007）
