摘要
就橡胶垫隔震体系和摩擦摆隔震体系,研究分析大型立式储液罐在不同场地实际地震作用下的响应,同时将地震响应与非隔震储罐进行对比分析。分析结果表明:在柔软场地,摩擦摆隔震系统的减震效果要好于橡胶垫系统。摩擦摆支座控制隔震层位移的能力要好于橡胶垫支座。此外,进行了参数影响分析,来衡量储罐储液量、高径比和隔震系统的隔震周期对储罐主要响应的影响。储罐储液量较小时,摩擦摆支座的减震率要好于橡胶垫支座。隔震储罐高径比不宜取为0.8,此时脉冲位移和基底剪力的峰值响应都较大。隔震周期在2 s～3 s区间范围内时,可以取得最优减震效果。
The authors research and analyze the responses of large vertical liquid storage tanks located on different sites to the real earthquake ground motions,based on the lead-rubber bearing（LRB） and friction pendulum system （FPS）. The seismic responses are compared with the corresponding responses of non-isolated tanks. It is found that, the FPS system is better than LRB in reducing the earthquake responses of tanks on soft site. FPS is found having higher ability of controlling the isolation displacement of tanks than the LRB. Moreover, a parametric study is conducted to evaluate the effect of tank storage level, aspect ratio and isolation period of the isolation system on key responses of the tanks. FPS is more effective in reducing the earthquake responses than LRB when the storage level is low. The aspect ratio of isolated tanks should not be taken as 0.8,in this case both impulsive displacement and base shear are great. Choosing the isolation period between 2 s -3 s, an optimal damping effect may be a- chieved.
出处
《地震工程与工程振动》
CSCD
北大核心
2012年第6期144-152,共9页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51078063/E0808)
中国寰球工程公司中国石油集团公司科技专项项目(H201104006)
