| 铅芯橡胶桥梁隔震支座屈服比的优化及设计应用 |
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| 引用本文： | 杨风利,钟铁毅,夏禾.铅芯橡胶桥梁隔震支座屈服比的优化及设计应用[J].中国铁道科学,2010,31(2). |
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| 作者姓名： | 杨风利 钟铁毅 夏禾 |
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| 作者单位： | 1. 中国电力科学研究院,北京,100055
2. 北京交通大学土木建筑工程学院,北京,100044 |
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| 基金项目： | 铁道部科技研究开发计划项目 |
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| 摘 要： | 运用有限元软件SAP2000,建立不同未隔震桥梁自振周期,铅芯橡胶隔震支座弹性周期、非弹性周期和隔震屈服比的198个单自由度隔震桥梁模型,进行非线性地震能量反应分析,研究铅芯橡胶隔震支座屈服比与其耗能比的关系以及不同地震水平下的优化屈服比。研究表明,隔震支座优化屈服比随着地震动水平的增强而增大,但增大趋势逐渐减缓;以ElCentro波作为激励得到的优化屈服比拟合公式对不同地震波具有较好的适用性;将基于最大限度耗能确定的隔震支座优化屈服比应用到桥梁隔震的两阶段设计中,即保证了桥梁在正常条件下的使用,又保证了在较大地震荷载作用下,隔震支座最大限度地发挥耗能减震作用。
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| 关 键 词： | 桥梁 铅芯橡胶支座 隔震 屈服比 参数优化 地震能量反应 |
Optimization Study on the Yield Ratio of Seismically Isolated Lead Rubber Bridge Bearing and Its Design Application |
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| YANG Fengli ,ZHON Tieyi ,XIA He.Optimization Study on the Yield Ratio of Seismically Isolated Lead Rubber Bridge Bearing and Its Design Application[J].China Railway Science,2010,31(2). |
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| Authors: | YANG Fengli ZHON Tieyi XIA He |
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| Affiliation: | YANG Fengli 1,ZHON Tieyi 2,XIA He 2 (1.China Electric Power Research Institute,Beijing 100055,China,2. School of Civil Engineering , Architecture,Beijing Jiaotong University,Beijing 100044,China) |
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| Abstract: | 198 single degree of freedom models of the seismically isolated bridges were established in FEA software SAP2000. The seismically isolated bridge models were generated by changing the fundamental period of bridge pier, the elastic and inelastic period as well as the yield ratio of seismically isolated bearing. The nonlinear seismic energy responses of the single degree of freedom models were analyzed. The relationship between the yield ratio of isolated bearing and the energy dissipation ratio was studied. ... |
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| Keywords: | Bridge Lead rubber bearing Seismic isolation Yield ratio Parameter optimization Seismic energy response |
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