基于残余力向量的框架损伤直接识别法

为直接识别出基于残余力向量法的框架结构损伤,提出先由灵敏度分析求得结构刚度联系矩阵,再由结构刚度联系矩阵将损伤结构的刚度摄动矩阵展开,得到新的结构残余力向量方程,通过求解此方程即可识别出框架结构的损伤位置和程度,最后运用所提出方法对三层框架结构进行损伤识别,结果表明识别精确度较高,从而验证了该方法的有效性.

A direct damage identification method of frame based on residual force vector

In order connectivity matrix damaged structure obtained. Thus, the proposed method is to identify the damage to the frame structure based on residual force vector, the stiffness of the frame is obtained by the sensitivity analysis. And the stiffness matrix perturbation of the can be expanded by the stiffness connectivity matrix, a new residual force rector equation is location and extent of the damaged frame can be identified by solving this equation. Finally, the used to identify a three-tier frame damage. The results show that recognition accuracy is high, which verifies the validity of this method.