基于系统识别的梁类构件故障诊断

Fault Diagnosis of Beam Based on System Identification Method

建筑结构的损伤诊断分析是结构性能评估的基础 .采用静态检测方法对梁类构件的损伤诊断问题进行了理论分析 .根据梁截面等效抗弯刚度的变化建立了梁的力学模型 ,利用在集中荷载作用下梁的挠度变化 ,并基于系统识别原理 ,建立了梁类构件的损伤诊断分析方法 .通过实例计算 。

The fault diagnosis of building structure is the basis of construction performing property evaluation. The fault diagnosis of beam is investigated by using the static state testing method. Based on decrease of beam section stiffness, an analysis model of beam is presented. The deflection of beam is chosen as a fundamental variable under a concentrated force. A fault diagnosis method is created through system identification method. Some examples are calculated. The results show the effectiveness of the method presented in this paper.