摘要
本文结合一工程实例 ,采用子空间迭代法求出该网壳结构的前 2 0阶自振频率和振型 ,分析了其振动规律 ;应用振型分解反应谱法和时程分析法分析了该网壳结构的地震反应 ;结合现行抗震设计规范对网壳结构进行了“二阶段”抗震验算。最后 ,本文得出了一些结论供工程界参考。
In this paper, the first 20 natural frequencies and the corresponding mode shapes of a single layer spherical lattice shell with openings are calculated using the subspace iteration method. The seismic response of the spherical dome is obtained by means of the modal decomposition response spectrum method and time history method. The 'two stage' seismic check is done according to the current code of seismic design. Some conclusions are put forward to the engineers at the end of this paper.
出处
《空间结构》
CSCD
2001年第3期52-56,共5页
Spatial Structures
关键词
大矢跨比
开孔单层球壳
自振特性
抗震设计
large depth to span ratio
single layer spherical dome with openings
natural properties
dynamic response
seismic design
