框架结构损伤识别的两步法

直接将框架结构的损伤定义在梁柱构件上，提出了一种识别一般框架损伤参数的动力方法，该方法分两步进行：第1步，利用结构的前几阶动力模态，通过对代数特征值反问题中一定带宽矩阵的识别方法加以改造，识别框架楼层侧移刚度矩阵；第2步，应用线性归化方法，由所识别的结构刚度矩阵，识别框架梁柱的损伤，算例分析表明，这一方法是可行的。

Two-step Approach for Damage Identification of Frame Structures

The damages of frameworks are identified directly on beams and columns in this paper, and a dynamic approach for identifying damage paramters of hamworks is presented. This approach is implemented by two steps. The first step aims at and determining the shffeess matrix of frams for lateral floor displacement, with several dynamic modes obtained, by employing the method used in inversed - problems of eigenvalues for idetifying a matrix with certain band width. The second step is to identify the damages of for beams and columns by using the method of linear programming based on the achievements of the first step. Finally, the effechveness of the approach proposed in this paper for identifying damages of frame structures is demonstrated by a numerical example.