摘要
以双层球面网壳为研究对象,分析了结构随参数变化的自振特性.采用Newmark积分法对其进行地震时程响应分析,研究了铝合金与钢双层网壳结构在竖向地震荷载作用下节点的位移响应及杆件的轴力响应。研究结果表明,铝合金双层网壳与钢双层网壳在结构相同情况下,其自振特性基本相同。而地震荷载引起的位移响应,铝合金双层网壳要略大于钢双层网壳,但铝合金双层网壳的杆件轴向应力远小于钢双层网壳的杆件轴向应力,因此用铝合金取代钢材是可行的。
The natural vibration characteristics of double-layer spherical reticulated shell of various structure parameters are studied in the paper. The seismic time-history response is analysed by using Newmark integral method. The node displacement response and pole axial stress of aluminum alloy and steel double-layer spherical reticulated shell are investigated under vertical seismic load. The analysis results show that natural vibration characteristics are mostly like in the same structure. But the displacement response of seismic load of the aluminum alloy reticulated shell is higher than that of the steel reticulated shell. At the same time the axial stress of aluminum alloy reticulated shell is much lower than that of the steel reticulated shell. So it is reasonable to use aluminum alloy to replace steel.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第z1期127-129,共3页
Journal of South China University of Technology(Natural Science Edition)
基金
广东省自然科学基金资助项目(990148)
广东省教育厅自然科学重点资助项目(200027)
关键词
双层球面网壳
有限元法
时程分析
地震响应
double-layer spherical reticulated shell
finite element method
time-history analysis
seismic response
