【摘要】 提出了基于结构振动响应互相关函数分析的损伤识别方法。通过八层剪切型钢框架结构模型在模拟白噪声随机激励作用下的试验,利用相邻测点响应的互相关函数幅值向量变化,构造损伤识别因子进行结构损伤判定、定位及程度量化,结果表明该方法对结构损伤识别的简易性及有效性,并为结构在线监测和分散式检测提供方法参考。更多还原

【Abstract】 A structural damage identification technique based on correlation function analysis of vibration measurement data was proposed.An 8-storey steel shear building model was chosen as example in the case verification.The results demonstrate that accident magnitude change of correlation function can be used to locate the damage by comparing the shape changes between damaged and undamaged samples.The value of CVAC is effective to determinate whether the damage has happened or not,and it can be used as a reference method even for on-line structural health monitoring.The parameter K,defined to detect damage severity,corresponds to the theoretical damage level in different cases.更多还原