| 桥梁结构基于性能的地震经济风险评估 |
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| 引用本文： | 张凯,朱晞,倪永军,江辉.桥梁结构基于性能的地震经济风险评估[J].中国铁道科学,2011,32(1). |
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| 作者姓名： | 张凯 朱晞 倪永军 江辉 |
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| 作者单位： | 北京交通大学,土木工程学院,北京,100044 |
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| 基金项目： | 国家自然科学基金资助项目(50578007,50808015,50908014) |
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| 摘 要： | 针对我国桥梁结构的地震直接经济风险评估,建立基于性能的实用评估方法。规范设防下利用地震动参数确定地震危险性,将改进能力谱方法用于确定桥梁结构各损伤状态的地震需求水平,结合桥梁损伤脆弱性以及相应的损失比,使桥梁结构的地震经济风险定量表达为年预期损失形式。并借助OpenSees地震工程仿真平台应用本方法对一座城市轨道交通桥梁进行地震经济风险评估。结果表明,在设定地震下桥梁结构的地震直接经济风险损失主要来自年超越概率较高的轻微破坏和中等破坏,约占风险损失的82.4%;而运用增量动力分析对该评估方法的验证结果表明,该方法的评估结果与增量动力分析结果相比较为保守,二者相对误差随年超越概率的降低而趋于减小。
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| 关 键 词： | 桥梁 地震直接经济风险 评估 年预期损失 脆弱性曲线 增量动力分析 能力谱方法 |
Performance-Based Seismic Financial Risk Assessment for Bridge Structure |
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| ZHANG Kai,ZHU Xi,NI Yongjun,JIANG Hui.Performance-Based Seismic Financial Risk Assessment for Bridge Structure[J].China Railway Science,2011,32(1). |
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| Authors: | ZHANG Kai ZHU Xi NI Yongjun JIANG Hui |
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| Institution: | ZHANG Kai,ZHU Xi,NI Yongjun,JIANG Hui(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China) |
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| Abstract: | A performance-based practical procedure is established for the direct seismic financial risk assessment to bridge structure in China.According to the code seismic fortification,the seismic hazard is determined using the earthquake intensity measure and a modified capacity-spectrum method is applied to determine the seismic demand levels corresponding to the damage states of bridge structure.The seismic financial risk for bridge structure can be quantified with the expected annual loss by integrating bridge ... |
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| Keywords: | Bridge Direct seismic financial risk Assessment Expected annual loss Fragility curve Incremental dynamic analysis Capacity spectrum method |
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