| MDOF桥墩结构基于能量的抗震性能分析方法 |
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| 引用本文： | 江辉,朱晞,张辉东.MDOF桥墩结构基于能量的抗震性能分析方法[J].北京交通大学学报(自然科学版),2009,33(4). |
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| 作者姓名： | 江辉 朱晞 张辉东 |
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| 作者单位： | 北京交通大学,土木建筑工程学院,北京,100044;天津城市建设学院,土木工程系,天津,300384 |
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| 基金项目： | 国家自然科学基金资助项目(50578007,50808015);;北京交通大学科技基金资助项目(2007XM033,2008RC026) |
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| 摘 要： | 针对脉冲型近场地震动的高能量输入,有必要发展以能量为指标的结构抗震性能分析方法.基于能量平衡原理,在给出多自由度体系的地震输入总能量和滞回耗能需求、结构耗能能力以及总能量沿各节点分布等计算方法的基础上,建立了一种基于能量概念的桥梁结构抗震性能评估方法.以3座加拿大的实际桥墩为算例,以近震记录和模拟脉冲为输入,验证了所建议方法的有效性和必要性.最后,以MDOF实体桥墩的时程分析结果为基础,对采用Akbas模型近似确定能量在以弯剪变形为主的中、低高度RC桥墩各截面分布的适用性进行了检验.
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| 关 键 词： | 防灾减灾 输入能量 滞回耗能 耗能能力 桥墩 脉冲模拟 Akbas模型 |
Energy Based Seismic Performance Analysis of MDOF Bridge Piers |
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| JIANG Hui,ZHU Xi,ZHANG Huidong.Energy Based Seismic Performance Analysis of MDOF Bridge Piers[J].JOURNAL OF BEIJING JIAOTONG UNIVERSITY,2009,33(4). |
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| Authors: | JIANG Hui ZHU Xi ZHANG Huidong |
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| Institution: | School of Civil Engineering;Beijing Jiaotong University;Beijing 100044;China;2.Department of Civil Engineering;Tianjin Institute of Urban Construction;Tianjin 300384;China |
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| Abstract: | Since great energy input demand exists for structures close to active fault regions,it is necessary to develop energy-based seismic analysis method.By considering the total energy input and hysteretic energy consumption demand of earthquake,as well as energy dissipation ability and energy distribution among each node of MDOF bridge pier,and based on energy-balance principle,an energy-based performance assessment method was introduced for bridge structure.A validation computation was conducted on 3 actual Ca... |
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| Keywords: | disaster prevention and reduction input energy hysteretic dissipated energy energy dissipation capacity bridge pier impulse simulation Akbas Rule |
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