桥梁健康诊断的子结构刚度修正法研究  

On the Sub-structural Stiffness Update of Bridge Health Monitoring

作　　者：孙志星[1,2] 许宏伟[1] 

机构地区：[1]石家庄铁道大学,石家庄050043 [2]河北省交通应急保障工程技术研究中心,石家庄050043

出　　处：《价值工程》2016年第6期112-113,共2页Value Engineering

摘　　要：通过模拟一简支梁算例不同部位及程度的损伤,综合分析基于子矩阵型模型修正的子结构刚度损伤识别方法的有效性。结果发现,在结构发生损伤时,结构的频率降低,但变化不大,单独用频率变化进行结构损伤识别是不切合实际的,采用子结构刚度修正法对结构进行损伤诊断,能够得到精确的识别,具有较强的实用性。Through simulating the injury in different positions and the degree of injury of a simply supported beam, the effectiveness of the sub-structural stiffness damage identification is analyzed based on the matrix model update. It was found that when the structural damage occurs, the frequency of the structure will reduces, but the change is small. The structural damage identification by only frequency variation is not practical. Detecting the damage of the structure by sub-structural stiffness update can get accurate identification and it has strong practicability.

关 键 词：桥梁健康诊断 损伤识别 子结构刚度修正 

分 类 号：U445.7[建筑科学—桥梁与隧道工程]