| 隔震曲线梁桥的地震响应 |
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| 引用本文： | 李宇,钟铁毅,杨风利,阎贵平.隔震曲线梁桥的地震响应[J].北京交通大学学报(自然科学版),2009,33(1). |
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| 作者姓名： | 李宇 钟铁毅 杨风利 阎贵平 |
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| 作者单位： | 北京交通大学土木建筑工程学院,北京,100044;北京交通大学土木建筑工程学院,北京,100044;北京交通大学土木建筑工程学院,北京,100044;北京交通大学土木建筑工程学院,北京,100044 |
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| 摘 要： | 根据隔震曲线梁桥的特点,利用两个正交的非线性水平弹簧单元来模拟铅芯橡胶支座的双向非线性特性,基于大型有限元分析软件SAP2000,选取强震记录作为地震输入,考虑了曲线梁桥自身特性的影响,建立了隔震与无隔震曲线梁桥的空间有限元模型,并进行了双向地震动作用下的地震响应分析.结果表明:铅芯橡胶支座不仅可以有效地降低曲线梁桥的地震响应,还有助于减少曲率半径对曲线梁桥地震响应的影响.为曲线梁桥减隔震设计的深入和桥梁结构抗震安全性的提高提供了依据和参考.
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| 关 键 词： | 桥梁 隔震 地震响应 时程分析 铅芯橡胶支座 |
Seismic Response of Seismically Isolated Curved Beam Bridge |
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| LI Yu,ZHONG Tieyi,YANG Fengli,YAN Guiping.Seismic Response of Seismically Isolated Curved Beam Bridge[J].JOURNAL OF BEIJING JIAOTONG UNIVERSITY,2009,33(1). |
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| Authors: | LI Yu ZHONG Tieyi YANG Fengli YAN Guiping |
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| Institution: | School of Civil Engineering;Beijing Jiaotong University;Beijing 100044;China |
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| Abstract: | According to the characteristics of seismically isolated curved beam bridge,the bidirectional nonlinear behavior of lead rubber bearing is taken into account by using two orthogonal nonlinear spring element.Based on FEA software SAP2000,reasonable strong seismic motion records are selected and the dimensional FEA models of curved beam bridges with and without lead rubber bearing are established.Considering the effect of characteristics of curved beam bridge,the time history analysis under bidirectional seis... |
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| Keywords: | bridges seismically isolated time history analyses lead rubber bearing |
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