| 基于车激响应和灵敏度分析的桥梁结构损伤识别方法研究 |
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| 引用本文： | 战家旺,夏禾,陈上有,De Roeck G. 基于车激响应和灵敏度分析的桥梁结构损伤识别方法研究[J]. 工程力学, 2011, 0(11): 38-44 |
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| 作者姓名： | 战家旺 夏禾 陈上有 De Roeck G |
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| 作者单位： | 北京交通大学土木建筑工程学院;中交公路规划设计院有限公司桥梁技术中心;鲁汶大学土木工程系; |
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| 基金项目： | 国家自然科学基金项目(51078029); 中央高校基本科研业务费专项资金项目(2009JBM061); 比利时-中国政府间合作项目(BIL07/07); 中国交通建设股份有限公司科技研发项目:铁路、轻轨、公铁(轨)桥梁车-桥耦合振动仿真分析研究 |
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| 摘 要： | 提出了一种利用桥梁结构在车辆荷载作用下在线响应评估结构性损伤的方法。以单元弯曲刚度的变化量为识别指标，基于车桥动力相互作用理论计算车激桥梁响应以及响应对损伤指数的灵敏度，以结构不同状态下的响应残差为约束条件，利用最小二乘法求解灵敏度方程得到各单元的损伤指数，然后通过有限元更新技术和反复迭代，最终实现对桥梁损伤的定位和定...
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| 关 键 词： | 桥梁 损伤识别 有限元模型更新 车激响应 灵敏度分析 损伤指数 |
DAMAGE DETECTION OF BRIDGES BASED ON TRAIN-INDUCED BRIDGE RESPONSE AND SENSITIVITY ANALYSIS |
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| ZHAN Jia-wang,XIA He,CHEN Shang-you,De Roeck G. DAMAGE DETECTION OF BRIDGES BASED ON TRAIN-INDUCED BRIDGE RESPONSE AND SENSITIVITY ANALYSIS[J]. Engineering Mechanics, 2011, 0(11): 38-44 |
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| Authors: | ZHAN Jia-wang XIA He CHEN Shang-you De Roeck G |
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| Affiliation: | ZHAN Jia-wang1,XIA He1,CHEN Shang-you2,De Roeck G3(1.School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China,2.Bridge Technology Development Center,CCCC Highway Consultants CO.,Ltd,Beijing 100088,3.Department of Civil Engineering,Catholic University of Leuven,Leuven B3001,Belgium) |
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| Abstract: | A damage evaluation method for bridges,using their online dynamic responses under passing vehicles,is proposed.The perturbation of the elemental flexural stiffness is used as an index for bridge damage identification.The train-induced bridge responses and the response sensitivities to the damage indexes are calculated based on the train-bridge dynamic interaction theory.Using the response differences between different states as restriction conditions,the sensitivity equation is solved by the least-squares m... |
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| Keywords: | bridge damage detection finite element model updating train-induced response sensitivity analysis damage index |
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