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| New Damage-locating Method for Bridges Subjected to a Moving Load | |
| 作者姓名： | LIU Fushun LI Huajun YU Guangming ZHANG Yantao WANG Weiying SUN Wanqing |
| 作者单位： | [1]College of Engineering, Ocean University of China, Qingdao 266071, P. R. China [2]College of Civil Enginering, Qingdao Technologyical University, Qingdao 266033, P. R. China [3]Shengli Engineering Consulting Co. Ltd, Dongving 257026, P. R. China [4]Center for Engineering Test and Appraisal, Qingdao Technological University, Qingdao 266033, P. R. China |
| 摘 要： | A new damage-locating method for bridges subjected to a moving load is presented, and a new ‘moving load damage-locating indicator＇ （MLDI） is introduced. A vehicle is modeled as a moving load, the bridge is simplified as an Euler-Bernoulli beam, and the damage is simulated by a reduction of stiffness properties of the elements. The curvature and MLDI values at each node of the baseline model （undamaged） and the damage model are computed respectively. Then the damage or damages can be located from a sudden change of the MLDI value. The feasibility and effectiveness of the proposed method are validated by numerical simulation. The results indicate that the method is effective, being able to not only locate a single damage accurately, but also locate multiple damages in simply-supported bridges, including multiple damages in continuous bridges. The results also indicate that the MLDI can accurately locate damages under 5% measurement noise. |
| 关 键 词： | 桥梁 移动载荷 损坏 定位方法 曲率 |
| 收稿时间： | 2006-06-19 |
| 修稿时间： | 2007-02-05 |
New damage-locating method for bridges subjected to a moving load |
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| LIU Fushun LI Huajun YU Guangming ZHANG Yantao WANG Weiying SUN Wanqing.New Damage-locating Method for Bridges Subjected to a Moving Load[J].Journal of Ocean University of China,2007,6(2):199-204. | |
| Authors: | Liu Fushun Li Huajun Yu Guangming Zhang Yantao Wang Weiying Sun Wanqing |
| Institution: | 1. College of Engineering, Ocean University of China, Qingdao 266071, P. R. China 2. College of Civil Engineering, Qingdao Technological University, Qingdao 266033,P. R. China 3. Shengli Engineering Consulting Co. Ltd, Dongying 257026, P. R. China 4. Center for Engineering Test and Appraisal, Qingdao Technological University,Qingdao 266033, P. R. China |
| Abstract: | A new damage-locating method for bridges subjected to a moving load is presented, and a new ‘moving load damage-locating indicator’ (MLDI) is introduced. A vehicle is modeled as a moving load, the bridge is simplified as an Euler-Bernoulli beam, and the damage is simulated by a reduction of stiffness properties of the elements. The curvature and MLDI values at each node of the baseline model (undamaged) and the damage model are computed respectively. Then the damage or damages can be located from a sudden change of the MLDI value. The feasibility and effectiveness of the proposed method are validated by numerical simulation. The results indicate that the method is effective, being able to not only locate a single damage accurately, but also locate multiple damages in simply-supported bridges, including multiple damages in continuous bridges. The results also indicate that the MLDI can accurately locate damages under 5% measurement noise. |
| Keywords: | damage-locating bridge moving load curvature |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ | |