论文部分内容阅读
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。
Taking the maximum displacement angle and displacement ductility ratio as the structural performance parameters and the peak acceleration as the parameters of ground motion strength, the six-story unsupported steel frame structure is taken as the research object, and the structure of 100 rigid and semi-rigid nodes is randomly generated. Samples, using nonlinear finite element software SAP2000 one by one their nonlinear dynamic elasto-plastic time history analysis. The results show that the semi-rigid joints can shift the maximum inter-story drift angle and change the position of the weak layers. The rotational deformation of the semi-rigid joints consumes the seismic energy, which can significantly reduce the structural vulnerability. The Latin hypercube random sampling can effectively consider Ground motion and structural randomness are conducive to the assessment of seismic vulnerability of steel frame structures.