| 蒙特卡罗法在桥梁损伤识别中的应用 |
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| 引用本文： | 单德山,李乔,张吉刚.蒙特卡罗法在桥梁损伤识别中的应用[J].重庆交通大学学报(自然科学版),2009,28(5):844-847. |
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| 作者姓名： | 单德山 李乔 张吉刚 |
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| 作者单位： | 西南交通大学,土木工程学院,四川,成都610031 |
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| 基金项目： | 铁道部科技攻关智能化桥梁研究项目 |
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| 摘 要： | 以桥梁结构损伤识别为研究对象,采用模态应变能损伤识别与蒙特卡罗法相结合的方法,讨论了测试噪声对桥梁结构损伤定位的影响。在分析过程中对模态的阶数、单损伤、多损伤及损伤部位等进行了研究,依据噪声影响下的模态应变能变化率定位结构损伤。以某连续梁桥为例验证了方法的有效性,利用蒙特卡罗法进行了1万次的计算,得到在不同损伤程度、不同损伤位置随测试噪声水平变化的识别率。研究结果表明,损伤识别率更能表征损伤识别方法,且符合工程实际需要。
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| 关 键 词： | 损伤识别 模态应变能 蒙特卡罗法 识别率 |
Application of Monte-Carlo Method to Bridge Damage Identification |
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| SHAN De-shan,LI Qiao,ZHANG Ji-gang.Application of Monte-Carlo Method to Bridge Damage Identification[J].Journal of Chongqing Jiaotong University,2009,28(5):844-847. |
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| Authors: | SHAN De-shan LI Qiao ZHANG Ji-gang |
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| Institution: | SHAN De-shan,LI Qiao,ZHANG Ji-gang(School of Civil Engineering,Southwest Jiaotong University,Sichuan Chengdu 610031,China) |
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| Abstract: | The damage identification of bridge structure is taken as the research object;modal strain energy method and Monte-Carlo method are adopted to discuss the influence of the inevitable testing noise on the damage location of bridge structure.The influences of modal orders,single damage,multiple damage and damage locations are taken into consideration during the analysis,and the structural damages are located according to the change ratio of modal strain energy with noise.Then,a case study of one continuous br... |
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| Keywords: | damage identification modal strain energy Monte-Carlo method identification ratio |
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