一种动静结合的框架结构损伤识别方法

A dynamic and static combining method for frame structure damages identification

为了改进对框架结构损伤的识别效果,在动态和静态损伤识别指标的基础之上,提出了将动态一阶应变差与静态单元相关系数相乘的动静相结合的损伤识别新指标。新指标具有动态法和静态法的优点,一定程度上对动态识别效果与静态识别效果进行叠加,较单独使用动态指标和静态指标更准确、更具优势。对一个4层框架结构的单处损伤和多处损伤进行了数值模拟,并分别使用动态、静态和动静结合的3种指标进行了损伤识别效果的比较,验证了新指标更具优越性。

In order to improve damage identification of frame structure,a new structural nondestructive identification indictor,a dynamic and static combining indictor was presented,which is based on dynamic indictor and static indictor.The new indictor has advantages of methods of dynamic and static.In a sense,the advantages of dynamic indictor and static indictor are superposed in new indictor.It is much exact than only used dynamic and static indictor for damage idenlification.Then its availability was verified through a typical four-story frame structure numerical simulation,and by compared with only used dynamic and static idenlification indictors.The result shows that new indictor is preponderant.