铅芯橡胶支座隔震储罐地震响应特性分析  

Seismic Response Characteristic of Liquid Storage Tank Isolated by Lead Rubber Bearings

作　　者：李扬[1] 李自力[1] 张艳[1] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东东营257061

出　　处：《工程抗震与加固改造》2009年第3期39-45,72,共8页Earthquake Resistant Engineering and Retrofitting

摘　　要：利用双线性恢复力模型模拟铅芯橡胶支座力学特性,探讨了不同类型场地上,隔震储罐在铅芯橡胶支座(LRB)与叠层橡胶支座(RB)两种隔震方式下的地震响应特点。研究表明:铅芯屈服力、场地类型和地震强度是影响LRB减震性能的主要因素。与RB隔震方式相比,LRB具有降低基底剪力、支座位移、晃动波高等优点,但减震效果并不总是好于RB方式,与场地类型和铅芯屈服力的选取有关。特别是Ⅳ类场地上RB支座更适合储罐隔震设计。支座最优屈服力参数选取需要根据储罐自振特点、场地类型和地震强度共同确定。LRB支座更适合在高烈度地区应用,减震效率高而且稳定。The seismic response of based-isolated liquid storage tank isolated by lead rubber bearing （LRB） and rubber bearing （RB） at different sites is investigated. The Bilinear hysteretic model is adopted to simulate the non-linear hysteretic characteristics of foree-displacement relationship for LRB. The study shows that yield force of lead plug, site class and earthquake intensity are important factors for the seismic response of isolated tank. The LRB is found to be more effective in reducing base shear, isolator displacement and sloshing height compared with the RB, but it depends on the site class and yield force of lead plug, especially RB is suitable for the design of isolated tank at soft site. The optimal yield force of lead plug is correlative with the fundamental frequency of tank, site class and earthquake intensity. The LRB performs efficiently and stable in the area of high earthquake intensity.

关 键 词：隔震储罐 铅芯橡胶支座 双线性模型 地震响应 

分 类 号：TU352.12[建筑科学—结构工程]