| 基于摩擦摆支座的地铁车站减震控制参数敏感性分析 |
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| 引用本文： | 陈之毅,贾鹏,刘志谦. 基于摩擦摆支座的地铁车站减震控制参数敏感性分析[J]. 土木工程学报, 2022, 55(4): 12-22 |
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| 作者姓名： | 陈之毅 贾鹏 刘志谦 |
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| 作者单位： | 1. 同济大学土木工程防灾国家重点实验室，上海 200092；2. 同济大学土木工程学院，上海 200092 |
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| 基金项目： | 国家自然科学基金(51778464)；;土木工程防灾国家重点实验室(SLDRCE19-B-38)； |
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| 摘 要： | 为研究摩擦摆支座参数对地铁车站结构地震响应的影响，以大开车站为研究对象，建立了三维精细化摩擦摆支座模型，开展了设置摩擦摆支座地铁车站结构的非线性动力时程分析。基于数值模拟结果，研究了摩擦摆支座滑面摩擦系数与滑面等效半径的不同组合对地铁车站结构地震响应的影响。研究发现，滑面摩擦系数与滑面等效半径的改变会明显改变地铁车站结构的地震响应，相比于滑面等效半径，滑面摩擦系数的改变对车站地震响应的影响更大。摩擦系数越小，车站中柱的地震响应越小。车站中柱的弯矩与变形随着摩擦摆支座等效半径的减小而增大，中柱剪力随等效半径的增大呈现出先减小后增大的趋势。
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| 关 键 词： | 摩擦摆支座 精细化模拟 地铁车站 参数分析 |
Parameter analysis of friction pendulum bearings in underground stations during the earthquake |
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| Chen Zhiyi Jia Peng Liu Zhiqian. Parameter analysis of friction pendulum bearings in underground stations during the earthquake[J]. China Civil Engineering Journal, 2022, 55(4): 12-22 |
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| Authors: | Chen Zhiyi Jia Peng Liu Zhiqian |
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| Affiliation: | 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;2. College of Civil Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | In order to study the influence of friction pendulum bearing(FPB)parameters on seismic response of underground station structure, a refined 3-dimensional finite element model of FPB is established. Using the method of dynamic time history analysis, the influences of the different combinations of friction coefficient of sliding surface and equivalent radius of concave surface of FPB on seismic response of underground station structure are studied. It is found that the changes of friction coefficient and equivalent radius may obviously affect the seismic response of underground station structure. Compared with the equivalent radius, the influence of the change of friction coefficient on the seismic response is greater. Particularly, the smaller the friction coefficient is, the smaller the seismic response of the central column is. However, the change of equivalent radius may result in different seismic responses. |
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| Keywords: | friction pendulum bearing refined simulation underground station parameter analysis |
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