摘要
针对大跨网壳结构的自振特性及地震反应特点,基于反应谱理论结合工程实际,对国家体育场主体建筑鸟巢进行了模态分析和多遇地震作用下的地震响应谱法分析,研究一维和二维地震输入作用下,结构的应力及位移分布规律,并作相应比较.计算结果表明,网壳结构在双向地震作用下的响应几乎都大于单维地震作用下的响应,对网壳若只进行单维地震作用计算则结构是不安全的,对其进行多维分析是必要的.
Considering the vibration characteristics and seismic response property of large-span reticulated shell structure, the mode and the seismic response-spectrum analyses are made under small earthquake based on theory of response spectrum. The paper studies the displacements and stresses response of the structure under one-dimensionul and two-dimensional seismic. The results show that the response of shell structure under two-dimensional is almost bigger than that of one-dimensional. It is not safe to consider one-way earthquake only, and the necessity of multi-dimensional seismic analysis has been confirmed.
出处
《浙江水利水电专科学校学报》
2009年第3期35-37,共3页
Journal of Zhejiang Water Conservancy and Hydropower College
关键词
地震反应
反应谱分析
模态分析
seismic analysis
response-spectrum analysis
mode analysis
