基于模态应变能法的混凝土梁桥结构损伤识别研究  

Numerical research on concrete beam-bridge structure damage identification based on modal strain energy

作　　者：王锋[1] 杨艳群[1] 郑玉芳[1] 

机构地区：[1]福州大学土木工程学院,福建福州350108

出　　处：《福州大学学报（自然科学版）》2009年第1期107-112,共6页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省青年科技人才创新基金资助项目(2006F3077);福州大学科技发展基金资助项目(2007-XQ-20)

摘　　要：基于模态应变能理论,得到能用于混凝土桥梁结构损伤的识别指标.假定结构存在不同位置和不同程度的损伤,运用Ansys软件进行有限元分析,得到混凝土桥梁损伤前后的前5阶模态,然后再运用计算机软件编程计算结构的各单元的损伤指标.数值模拟结果表明,损伤指标在损伤单元处的数值是最大的.因此,采用所提出的损伤指标,对混凝土桥梁结构进行损伤定位识别是可行的.Based on the theory of modal strain energy, a damage index is deduced to identify the concrete bridge structure damage. In this paper, supposing there lie some different damage positions and extents in structure, the software Ansys is applied to obtain the first five modes of concrete bridge structure before and after damage by using finite element analysis, and then every element damage index in structure is calculated through applying the computer software program. The numerical results show that the damage index value in the damage element is the biggest. It is concluded that the proposed damage index is feasible for the damage localization of concrete bridge structures.

关 键 词：混凝土桥梁结构 损伤识别 模态应变能 

分 类 号：U443.31[建筑科学—桥梁与隧道工程]