湖南大学学报（自然科学版）2025，Vol.52Issue(11)：42-51,10.DOI:10.16339/j.cnki.hdxbzkb.2025104
立体车库梁柱节点对接焊缝风致疲劳性能分析
Wind-induced Fatigue Performance Analysis of Butt Weld in Beam-column Joint of Three-dimensional Garage
摘要
Abstract
A multi-scale model of the whole steel frame based on the substructure method was established.Matlab was used to simulate a 600 s synoptic wind for conducting the dynamic time-history analysis.The fatigue characteristic of the detailed structure was analyzed using the equivalent structural stress method.The critical point of wind-induced fatigue in the three-dimensional garage was explored.The rationality of using a multi-scale model based on the substructure method for analyzing the whole structure was assessed.The effects of flange docking mode,transition angle and cantilever beam length on the fatigue life of the structure were calculated.The results show that the wind-induced fatigue danger position of the three-dimensional garage is at the edge of butt weld between the lower flange of the beam and the cantilever segment on the weak axis side of the middle beam-column joint in the windward surface of the top second layer.The predictions from the multi-scale model structure based on substructure method are in good agreement with the second-order solid element model,satisfying engineering accuracy requirements.The stress concentration at the butt weld is effectively reduced by adopting a center-aligned flange welding mode.The fatigue life of the whole structure increases with the increase of the angle of the transition zone and the length of the cantilever beam segment.关键词
子结构法/多尺度模型/等效结构应力/疲劳损伤Key words
substructure method/multi-scale model/equivalent structural stress/fatigue damage分类
建筑与水利引用本文复制引用
贺拥军,林俊杰..立体车库梁柱节点对接焊缝风致疲劳性能分析[J].湖南大学学报（自然科学版）,2025,52(11):42-51,10.基金项目
国家自然科学基金资助项目(52478170),National Natural Science Foundation of China(52478170) （52478170）
