| 竖向地震作用对上承式拱桥的影响 |
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| 引用本文： | 彭勇均,朱东生,臧博.竖向地震作用对上承式拱桥的影响[J].重庆交通学院学报,2009(3). |
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| 作者姓名： | 彭勇均 朱东生 臧博 |
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| 作者单位： | 重庆交通大学土木建筑学院; |
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| 摘 要： | 以一座跨径131 m的实际钢筋混凝土箱板拱桥为基础,建立了全桥计算模型,沿顺桥向、横桥向单向和多向输入地震反应谱,采用反应谱法计算了该桥的地震反应。通过改变反应谱输入方式和该桥的矢跨比、拱轴系数,计算了不同矢跨比、不同拱轴系数下主拱圈地震内力,比较分析了在竖向地震作用影响下,主拱圈地震内力的差别。研究结果表明,对于大跨度上承式箱板拱桥,竖向地震作用对拱圈的地震内力是有放大影响的,不考虑竖向地震作用的影响是不合理的。
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| 关 键 词： | 上承式拱桥 竖向地震反应 反应谱 |
Vertical Seismic Response on a Top-Bear Arch Bridge |
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| PENG Yong-jun,ZHU Dong-sheng,ZANG Bo.Vertical Seismic Response on a Top-Bear Arch Bridge[J].Journal of Chongqing Jiaotong University,2009(3). |
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| Authors: | PENG Yong-jun ZHU Dong-sheng ZANG Bo |
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| Institution: | PENG Yong-jun,ZHU Dong-sheng,ZANG Bo(School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China) |
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| Abstract: | Based on an actual reinforced concrete box arch bridge with 131 m span,the computing model of the entire bridge is established.The seismic response spectrum of the bridge is input from longitudinal,transverse and multi-direction and the seismic response of this bridge is calculated.Through changing the inputting mode of response spectrum,the span-ratio and arch-axis coefficients,the seismic internal force of main arch is calculated under different span-ratio and arch-axis coefficients.Contrastive analysis o... |
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| Keywords: | top-bear arch bridge vertical seismic response response spectrum |
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