节点域对多层钢结构动力损伤的影响  

Influence of panel zone on dynamic damage of multi-storey steel structures

作　　者：李梦瑶 张昭[1] 包恩和 Li Meng-yao;Zhang Zhao;Bao En-he(Department of Civil Engineering,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学土木工程学院,贵州贵阳550025

出　　处：《工程抗震与加固改造》2024年第2期114-120,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：基于云图法研究钢框架外挂摇墙概率地震需求变形(贵大人基合字(2021)10号)。

摘　　要：为明确节点域对多层钢框架整体结构性能的影响,针对4组研究模型,运用动力弹塑性时程分析,从整体结构的层间位移、耗能、建筑塑性变形能量速度换算值、滞回曲线、最大延性比和最大累积塑性延性比研究了节点域对整体钢框架的影响。研究结果表明:考虑节点域影响之后,首层层间位移显著降低,且各层位移趋于均匀;节点域耗能显著且各层均匀;塑性变形能量速度换算值、最大延性比和最大累积塑性延性比均增大;以上分析均表明节点域的影响在整体结构中起着积极的作用,结构设计不可忽略。In order to clarify the influence of panel zone on the overall structural performance of multi-storey steel frame,the four frame models were researched by using dynamic elastic-plastic time history analysis.The influence of panel zone on the overall steel frame was studied on the aspects of inter-story displacement,energy consumption,plastic deformation energy velocity conversion value,hysteretic curve,maximum ductility ratio and maximum cumulative plastic ductility ratio in the structure.The results show that after considering the influence of panel zone,the displacement between the first layer decreases significantly,and the displacement of each layer tends to be uniform,than the energy consumption of panel zone is significant and those of each layer are uniform,while the converted value of plastic deformation energy velocity,the maximum ductility ratio and the maximum cumulative plastic ductility ratio increase.The above analysis shows that the panel zone plays a positive role,and cannot be ignored in overall steel frame structural design.

关 键 词：节点域 钢结构 动力弹塑性分析 损伤 

分 类 号：TU391[建筑科学—结构工程]