摘要
采用随机振动、时程分析及振型分解反应谱方法，分别对多种隔震支座刚度情况下的高位隔震大跨连体结构地震响应进行分析，从而得出连体结构在不同频率比（塔楼基频／隔震装置固有频率）下的地震响应关系曲线；通过对曲线进行分析，得出当塔楼基频与隔震装置的固有频率比大于1．2—1．4时，连接体桁架地震响应就可产生减震效果的结论。通过对比三种方法计算结果发现，反应谱法计算出来的连体桁架位移与其他两种方法相比有明显误差，当隔震支座刚度较小时尤为明显。
The dynamic responses of high-position isolation interconnected buildings under various bearing stiffness are studied by using stochastic vibration, time history analysis and response spectrum methods, and the curves of dynamic response in various frequency ratio of single-tower and isolation mechanism are derived. Results show that seismic isolator can mitigate the seismic force of connecting truss when the fundamental frequency ratios are larger than 1.2 - 1.4. Comparing with other methods, response spectrum method have obvious errors in calculating displacement of linked truss of hlgh-position isolation interconnected buildings, especially in weak bearing stiffness.
出处
《四川建筑科学研究》
北大核心
2010年第1期132-136,共5页
Sichuan Building Science
基金
国家自然科学基金创新研究群体项目(50621062)
关键词
连体结构
高位隔震
时程分析
随机振动
反应谱法
connected structures
isolation
time history analysis
stochastic vibration
response spectrum method
