摘要
采用顶点最大位移角、位移延性比作为结构性能参数,峰值加速度作为地震动强度参数,以6层无支撑钢框架结构为研究对象,分别随机生成100个刚节点和半刚节点的结构-地震动样本,采用有限元软件SAP 2000对其一一进行非线性动力弹塑性时程分析。研究结果表明:半刚性节点使最大层间位移角上移,薄弱层位置会发生变化;半刚性节点的转动变形消耗地震能量,可以显著降低结构的易损性;拉丁超立方随机抽样可以有效考虑地震动和结构随机性,有利于钢框架结构地震易损性的评估。
Using the maximum story drift angle and the displacement ductility ratio as performance parameters of the structure,the peak acceleration as ground motion intensity parameter,the six floors steel frame structure as the research object,nonlinear dynamic elastoplastic time history analysis of 100 structure-ground motion samples with the rigid joints and semi-rigid joints was carried out by finite element software SAP 2000. The results showed that the semi-rigid nodes of steel frame structure made the maximum story drift angle and changed the position of weak layer;rotational deformation of the semi-rigid joints could significantly consume the earthquake energy and reduce the vulnerability of the structure. The Latin hypercube sampling considering the ground motion and structural randomness was advantageous to the seismic vulnerability assessment of steel frame structure.
出处
《工业建筑》
CSCD
北大核心
2016年第9期158-162,共5页
Industrial Construction
基金
江苏省普通高校研究生科研创新计划(CXLX13_099)
江苏高校优势学科建设工程资助项目(CE02-1-18)
关键词
半刚性节点
钢框架
地震易损性
弹塑性时程分析
semi-rigid nodes
steel frame structure
seismic vulnerability
elastoplastic time-history analysis
