摘要
为研究考虑裂纹扩展的钢框架节点抗震性能、断裂性能的优劣,选用3种构造形式的焊接节点在不同加载制度下对节点的破坏模式、承载力退化程度、变形及延性比、耗能等多项抗震性能指标以及等效塑性应变、应力三轴度、开裂指数等多项断裂性能指标进行比较分析。研究表明:相较于其他节点,H-H型节点抗震性能最佳,但由于焊趾位置应力集中使之最易开裂;加载制度对节点承载力退化及断裂破坏有直接影响。
In order to study the seismic behavior and fracture performance of different types of joints considering crack propagation,the failure modes,bearing capacity degradation degree,deformation and ductility ratio of three types of welded joints under different loading conditions were selected. Several seismic behavior indexes such as energy dissipation,equivalent plastic strain,stress triaxiality and cracking index were compared and analyzed. The results showed that the seismic behavior of H-H joints was the best compared with other joints,but the stress concentration at the weld toe made the joints crack most easily,and the loading system had a direct effect on the bearing capacity degradation and fracture failure of joints.
作者
成维佳
李维滨
左媛
CHENG Weijia;LI Weibin;ZUO Yuan(College of Civil Engineering,Southeast University,Nanjing 211189,China)
出处
《钢结构》
2018年第9期24-29,共6页
Steel Construction
基金
江苏省普通高校研究生科研创新计划(KYLX15_0211)
江苏高校优势学科建设工程资助项目(CE02-1-51)
关键词
钢结构抗震
裂纹扩展
3种构造形式节点
抗震性能
开裂指数
steel structure aseismic
crack propagation
three types of structural nodes
seismic performance
cracking index
