Damage Identification of Multi-box Steel-concrete Composite Bridges Based on Modal Curvature Difference Method

摘要：

　　Based on the data from dynamic analysis of a 40m-span multi-box steel-concrete composite bridge and the difference value of its modal curvature before and after the structural damage, this paper detects the damage locations in steel-concrete composite bridge by modal curvature difference method (MCDM).Here we adopt the updated finite element model in last work as analytical model, taking concrete density and elastic modulus as updating parameters and modal frequency+MAC as reference data.The results indicate that the modal curvature difference method can well locate the damages in steel-concrete composite bridge, especially the damage in concrete.But the change rate of frequency as damage index is insensitive to the bridge damage and the method cant be applied solely for practical.

关键词： Steel-concrete composite bridge Finite element method Damage identification Dynamic behaviour Modal curvature difference

作者: Yi Qiang Xiang Li Si Liu Yu Liang He

作者单位: Department of Civil Engineering,Zijingang Campus,Zhejiang University,Hangzhou,China;Cyrus Tang Cente Department of Civil Engineering,Zijingang Campus,Zhejiang University,Hangzhou,China

会议类型: 国际会议

会议名称: the 2012 International Conference on Vibration, Structural Engineering and Measurement (2012年振动、结构工程与测量国际会议(ICVSEM2012))

会议地点: 上海

会议语种:英文

页码: 1689-1692

在线出版日期: 2012-10-19（万方平台首次上网日期，不代表论文的发表时间）