| 考虑河谷场地效应的大跨CFST拱桥地震响应分析 |
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| 引用本文： | 叶丹,,,周建庭,,王领,,张瑞杰,,徐略勤,,金双双,.考虑河谷场地效应的大跨CFST拱桥地震响应分析[J].世界地震工程,2022,38(3):108-116. |
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| 作者姓名： | 叶丹 周建庭 王领 张瑞杰 徐略勤 金双双 |
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| 作者单位： | 1. 重庆交通大学 土木工程学院, 重庆 400046;2. 重庆第二师范学院, 重庆 400065;3. 省部共建山区桥梁与隧道国家重点实验室, 重庆 400074 |
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| 摘 要： | 本文对某特大跨上承式铁路钢管混凝土拱桥建立“V”型河谷场地有限元动力计算模型，结合时空解耦的时域动力有限元方法，研究“V”型河谷场地效应对其地震响应的影响，并考虑地震入射角、行波速度及地震动峰值等因素对场地效应的影响。结果表明:海拔高且坡度均匀的地形使地震波在反射过程中能量增大，海拔较低且坡度下陡上缓的地形使地震波在反射过程中能量减少，“V”型河谷场地效应使大部分钢管混凝土拱圈截面内力测量值放大作用明显；“V”型河谷场地地形效应与地震波的入射角、行波速度及加速度峰值等因素均有关联，且CFST拱肋面外受弯抗震性能受行波速度的影响较大。因此，钢管混凝土拱桥抗震设计中应注意场地地形效应及行波速度的影响。
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| 关 键 词： | 大跨钢管混凝土拱桥 河谷场地效应 地震响应 时域动力有限元方法 |
Seismic response analysis of long span CFST arch bridge under Valley site effect |
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| YE Dan,,' target="_blank" rel="external">,ZHOU Jianting,' target="_blank" rel="external">,WANG Ling,' target="_blank" rel="external">,ZHANG Ruijie,' target="_blank" rel="external">,XU Lueqin,' target="_blank" rel="external">,JIN Shuangshuang,' target="_blank" rel="external">.Seismic response analysis of long span CFST arch bridge under Valley site effect[J].World Information On Earthquake Engineering,2022,38(3):108-116. |
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| Authors: | YE Dan " target="_blank">' target="_blank" rel="external"> ZHOU Jianting " target="_blank">' target="_blank" rel="external"> WANG Ling " target="_blank">' target="_blank" rel="external"> ZHANG Ruijie " target="_blank">' target="_blank" rel="external"> XU Lueqin " target="_blank">' target="_blank" rel="external"> JIN Shuangshuang " target="_blank">' target="_blank" rel="external"> |
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| Affiliation: | 1. School of Civil Engineering & Architecture, Chongqing Jiaotong University, Chongqing 400046, China;2. Chongqin University of Education, Chongqing 400065, China;3. State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China |
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| Abstract: | In this paper,a"V" type Valley site finite element dynamic calculation model of a super long-span deck railway concrete-filled steel tube arch bridge is established,and the influence of "V" type Valley site effect on its seismic response is studied by combining with the time-domain dynamic finite element method of time-space decoupling,and compared with the uniform excitation。Andthe effects of seismic incident angle,traveling wave velocity and seismic peak value on site effect are considered. The results show that:the terrain with high altitude and uniform slope can increase the energy of seismic wave in the process of reflection,while the terrain with low altitude and steep slope can reduce the energy of seismic wave in the process of reflection."V" type Valley site effectis related to the incident angle of seismic wave,traveling wave velocity,peak acceleration and other factors。The seismic performance of CFST arch rib in out of plane bending is greatly affected by the traveling wave velocity.Therefore, the effect of site topography and the traveling wave velocity should be paid attention to in the seismic design of CFST arch bridge. |
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| Keywords: | long span concrete filled steel tubular arch bridge Valley site effect seismic response time domain dynamic finite element metho |
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