朱东生, 劳远昌, 沈大元, 李乔. LRB隔震桥梁的地震反应特点[J]. 工程力学, 2001, 18(1): 119-125.
引用本文: 朱东生, 劳远昌, 沈大元, 李乔. LRB隔震桥梁的地震反应特点[J]. 工程力学, 2001, 18(1): 119-125.
ZHU Dong-sheng, LAO Yuan-chang, SHEN Da-yuan, LI Qiao. THE SEISMIC RESPONSE FEATURES OF ISOLATED BRIDGE WITH LBR[J]. Engineering Mechanics, 2001, 18(1): 119-125.
Citation: ZHU Dong-sheng, LAO Yuan-chang, SHEN Da-yuan, LI Qiao. THE SEISMIC RESPONSE FEATURES OF ISOLATED BRIDGE WITH LBR[J]. Engineering Mechanics, 2001, 18(1): 119-125.

LRB隔震桥梁的地震反应特点

THE SEISMIC RESPONSE FEATURES OF ISOLATED BRIDGE WITH LBR

  • 摘要: 本文对一座采用铅芯橡胶支座(LRB)隔震的桥梁输入了多条具有相同反应谱、且时域内强度包线形状相似的地震波,通过非线性时程分析发现: LRB隔震桥梁地震反应的离散性很大,其最大响应对地震动的全过程十分敏感;LRB是一种有效的隔震装置;LRB的初始屈服力对隔震效果影响较大。

     

    Abstract: In this paper, nonlinear time history analysis of isolated bridges is conducted with the use of large numbers of seismic waves which have same response spectrum and similar envelop in time-domain. It is found that the responses of isolated bridges with lead-rubber bearings differ from each other to a large extent. The maximum response is sensitive to the total process of seismic ground motion. The lead-rubber bearings are a very efficient energy dissipation system. The initial yielding force of lead-rubber bearings has an important influence on isolation effectiveness.

     

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