基于人工地震波的铅芯橡胶支座等效线性化模型研究  

Equivalent Linear Model of Lead-Rubber Bearings Trained with Artificial Earthquake Wave

作　　者：杨春 YANG Chun(ShanghaiLongilat Architecture Design and Research Institute Co.,Ltd.,Shanghai 200090,China)

机构地区：[1]上海经纬建筑规划设计研究院股份有限公司,上海200090

出　　处：《结构工程师》2020年第3期35-39,共5页Structural Engineers

摘　　要：回顾了四种经典的隔震支座等效线性化模型及其适用范围.使用参数识别算法建立了基于设计加速度反应谱合成人工地震波的铅芯橡胶支座等效线性化模型,并用桥梁隔震算例验证该模型的有效性.研究结果表明:该模型对预测合成人工地震波以及天然地震波作用下的铅芯橡胶支座水平位移均有较高的准确性;等效线性化模型不仅与支座的力学参数有关,还受地震波加速度反应谱特征的影响.Four classica l equivalent linear models of seism ic isolation bearings and their application scope are reviewed.A n equivalent lin ear model of the lead-rubber bearings trained with artificial earthquake wave from design acceleration response spectrum is established in this paper using an identification method.The effectiveness of this model is demonstrated with a num erical example of isolated bridge.The results show that the horizontal displacem ent of bearings under artificial or natural earthquakes can be predicted with high accuracy.The equivalent linear model is associated with the m echanical parameters of bearings and the characteristics of earthquake acceleration response spectrum.

关 键 词：铅芯橡胶支座 等效线性化 隔震 人工地震波 

分 类 号：TU352.12[建筑科学—结构工程] U442.55[建筑科学—桥梁与隧道工程]