基于曲率模态的钢筋混凝土梁多点损伤位置识别  

Curvature Model Based Many Damage Locations Identification of Reinforced Concrete Beam

作　　者：常军[1] 

机构地区：[1]苏州科技学院管理科学与工程系

出　　处：《建筑科学与工程学报》2006年第4期24-27,共4页Journal of Architecture and Civil Engineering

基　　金：国家重点基础研究发展计划("九七三"计划)项目(2002CB412709)

摘　　要：采用曲率模态对钢筋混凝土梁的多点损伤位置进行了识别研究。首先用有限元程序建立结构模型,并计算出位移模态振型,然后用差分法计算出曲率模态;同时对实际结构进行检测,得到结构的振型并计算出曲率模态。通过有限元模型和实际结构的曲率模态计算得到结构损伤因子,通过分析该损伤因子,可以判断实际结构的损伤位置。数值模拟算例分析表明,曲率模态对结构的损伤较敏感,用该方法识别结构的多点损伤位置是行之有效的。An approach of structural many damage locations of reinforced concrete beam identification by curvature model was studied. Firstly, the finite element software of structure was built; the structural displacement models vibration shape was computed. By using the central difference approximation, the curvature models were then gained from the displacement mode shapes. At the same time, the real structure was inspected; the structural displacement models were gained and the curvature modes were calculated. Through comparing the curvature modes of real structure with finite element model, a damage factor was gained. Based on analyzing the damage factor, damage location can be identified. Numerical simulation analysis shows that the curvature model has a little sensitivity to damage of structures; it is an effective method to evaluate many damage locations identification of structure.

关 键 词：钢筋混凝土梁 损伤识别 曲率模态 动力特性 有限元方法 

分 类 号：TU375.1[建筑科学—结构工程]