【摘要】 双层球面网壳结构是一种缺陷敏感型结构,影响结构动力失效的初始缺陷主要有杆件的初弯曲、杆件的残余应力和结构节点的初始安装偏差3种。本文首先利用有限元软件ANSYS的二次开发功能开发了可以考虑初始弯曲和残余应力的杆单元,接着利用动力增量法(IDA)系统地研究了这3种缺陷对结构动力失效的影响,最后总结提出了考虑缺陷的双层球面网壳结构的抗震损失评估方法。更多还原

【Abstract】 The double-layer spherical reticulated shell is the structure which is sensitive to imperfections.The initial imperfections influencing structural dynamic failure are initial curvature and residual stress of bar element and installation deviation of nodes.With the ANSYS secondary exploitation,the programs of bar element were written to consider the influences of initial curvature and residual stress.Based on the works,the influences of the three imperfections on dynamic failure of the spherical reticulated shell were got by IDA.Then the estimate method of seismic losses of the double-layer spherical reticulated shell was put forward.更多还原