框架结构损伤识别的两步法
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摘要
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。
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.
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.
引文
1Yao G C, Chang KC, Lee G C Damage diagnosis of steel frames using vibrational signature analysis. J Engineering Mechanics, ASCE, 1992,118(9):1949~1960
2李洪泉,欧进萍。剪切型钢筋混凝土框架的地震损伤识别方法.哈尔滨建筑大学学报,1996,29(2):8-12
3陈隽.输入未知条件下结构物理参数识别与荷载反演研究:[学位论文 ].郑州:郑州工学院土木工程系,1996
4周树荃.代数特征值的反问题.郑州:河南科学技术出版社,1991
5李国强,沈祖炎.半刚性连接钢框架弹塑性地震反应分析.同济大学学报,1992,22(2):123~128
6薛履中.工程最优化技术天津:天津大学出版社,1989
2李洪泉,欧进萍。剪切型钢筋混凝土框架的地震损伤识别方法.哈尔滨建筑大学学报,1996,29(2):8-12
3陈隽.输入未知条件下结构物理参数识别与荷载反演研究:[学位论文 ].郑州:郑州工学院土木工程系,1996
4周树荃.代数特征值的反问题.郑州:河南科学技术出版社,1991
5李国强,沈祖炎.半刚性连接钢框架弹塑性地震反应分析.同济大学学报,1992,22(2):123~128
6薛履中.工程最优化技术天津:天津大学出版社,1989
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