| 双曲面球型减隔震支座曲线连续梁桥的减隔震 |
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| 引用本文： | 顾正伟,钟铁毅,张贞阁. 双曲面球型减隔震支座曲线连续梁桥的减隔震[J]. 中国铁道科学, 2011, 32(3) |
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| 作者姓名： | 顾正伟 钟铁毅 张贞阁 |
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| 作者单位： | 1. 北京交通大学,土木建筑工程学院,北京,100044
2. 中冶建筑研究总院有限公司,北京,100088 |
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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： | 针对某3跨门式桥墩轨道交通曲线连续梁桥,采用其桥址<地震安全性评价报告>提供的3条地震动时程曲线,应用SAP2000有限元软件,分析未隔震和双曲面球型减隔震支座隔震条件下的罕遇地震响应,进行双曲面球型减隔震支座曲线连续梁桥的减隔震研究.研究结果表明,曲线连续梁桥各桥墩的内力响应受响应内力方向与地震动输入方向火角的影响;仅固定墩切向隔震时,固定墩的切向内力大幅减少,弯矩和剪力分别减小约70%和50%,但各墩的径向内力均有增加,最大增幅约达10%,不能满足桥梁的抗震要求;固定墩切向和径向双向、滑动墩径向隔震时,固定墩的切向和径向内力均大幅减少,弯矩和剪力分别降低约73%和49%,同时各滑动墩的径向内力也大幅降低40%～60%,减震效果明显.
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| 关 键 词： | 曲线连续梁桥 减震 隔震 双曲面球型减隔震支座 地震响应 有限元分析 |
Seismic Isolation of Curved Continuous Bridge with Double Spherical Aseismic Bearing |
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| GU Zhengwei,ZHONG Tieyi,ZHANG Zhenge. Seismic Isolation of Curved Continuous Bridge with Double Spherical Aseismic Bearing[J]. China Railway Science, 2011, 32(3) |
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| Authors: | GU Zhengwei ZHONG Tieyi ZHANG Zhenge |
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| Affiliation: | GU Zhengwei1,ZHONG Tieyi1,ZHANG Zhenge2(1.School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China,2.Central Research Institute of Building & Construction Co.,Ltd,MCC Group,Beijing 100088,China) |
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| Abstract: | The FEA model of a 3-span rail transit curved continuous bridge with twin-legged portal pier is established by SAP2000.By using three earthquake time history waves provided by Seismic Safety Evaluation Report,the calculation of isolation and non-isolation seismic responses of curved continuous bridge with and without double spherical aseismic bearing under rarely-occurred earthquake is carried out.By comparison,the results show that the internal force responses of each pier of the curved continuous bridge a... |
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| Keywords: | Curved continuous bridge Vibration absorption Seismic isolation Double spherical aseismic bearing Seismic responses Finite element analysis |
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