| 多振型效应对铁路高柔桥墩弹塑性地震响应的影响 |
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| 引用本文： | 李宇,朱晞,杨庆山. 多振型效应对铁路高柔桥墩弹塑性地震响应的影响[J]. 铁道学报, 2011, 0(11): 99-105 |
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| 作者姓名： | 李宇 朱晞 杨庆山 |
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| 作者单位： | 长安大学公路学院旧桥检测与加固技术交通行业重点试验室;北京交通大学土木建筑工程学院; |
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| 基金项目： | 国家自然科学基金资助项目(50808015,50908014); 中央高校基本科研业务费专项资金(CHD2011JC003,CHD2011JC004); 中国博士后科学基金(2011M501429) |
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| 摘 要： | 对FEMA356和ATC-40中考虑多自度效应的非线性静力分析法进行改进。并在FEMA440考虑土-结构相互作用能力谱法基础上,以我国西南某铁路特大桥桥墩为研究对象,选取与我国《铁路工程抗震规范》Ⅱ类场地相符合的80条强震记录,利用FEMA440性能点轨迹法求解高柔桥墩结构延性及性能点;并与80条强震记录非线性时程分析计算结果平均值进行比较。验证本文改进的非线性静力分析法反映高柔桥墩多自度效应的合理性,及考虑土-结构相互作用能力谱法在铁路桥梁工程中应用的可行性。
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| 关 键 词： | 高柔桥墩 抗震性能评估 土-结构相互作用 多振型效应 能力谱法 FEMA440 |
Effects of Multiple-mode Vibration on Elastic-plastic Seismic Responses of High Flexible Piers of Railway Bridge |
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| LI Yu,,ZHU Xi,YANG Qing-shan. Effects of Multiple-mode Vibration on Elastic-plastic Seismic Responses of High Flexible Piers of Railway Bridge[J]. Journal of the China railway Society, 2011, 0(11): 99-105 |
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| Authors: | LI Yu ZHU Xi YANG Qing-shan |
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| Affiliation: | LI Yu1,2,ZHU Xi2,YANG Qing-shan2(1.Key Laboratory of Ministry of Communications for Bridge Detection & Reinforcement Technology,Chang'an University,Xi'an 710064,China,2.School of Civil Engineering,Beijing Jiaotong University,Beijing,100044,China) |
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| Abstract: | Nonlinear static analysis considering multiple-mode effects in FEMA356 and ATC-40 is improved.Basing on the capacity spectrum method(CSM) of soil-structure interaction effects(SSI) in FEMA440,taking the piers of one extra-long bridge of a railway line in southwest of China as the object of research and choosing eighty strong ground motion records in agreement with stipulations of site Ⅱ specified in the Code of Seismic Design for Railway Engineering,the ductility and performance points of high flexible piers are solved by using the modified acceleration-displacement response spectrum(MADRS) locus of possible performance points introduced in FEMA440.From nonlinear time history analyses,the rationality and feasibility of the improved nonlinear static analysis method considering multiple-mode effects is verified by comparing with the average of seismic responses.The practicability of CSM considering SSI for railway bridge aseismic assessment is also verified. |
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| Keywords: | high flexible pier seismic performance assessment soil-structure interaction(SSI) multiple-mode vibration effects capacity spectrum method FEMA440 |
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