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。
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.
出处
《地震工程与工程振动》
CSCD
北大核心
2012年第1期36-42,共7页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金重大研究计划项目(90915004)
关键词
双层球面网壳
动力失效
初弯曲
残余应力
节点安装偏差
double-layer spherical reticulated shell
dynamic failure
initial curvature
residual stress
installation deviation of nodes
