基于多指标综合评估的斜拉桥损伤识别研究

Research on Damage Identification of Cable-stayed Bridges Based on Multi-index Comprehensive Evaluation

为解决桥梁损伤识别过程中采用单一损伤指纹进行损伤识别结果不准确的问题,提高损伤识别效率,文章提出应用曲率模态差与位移模态小波系数差两种损伤指标进行比损伤识别,综合对比两指标的损伤识别结果后再进行损伤识别。依托某斜拉桥进行数值模拟,根据模拟数据进行计算并对该方法进行了验证。研究认为,应用两种损伤指标进行评估,可避免使用单一损伤指标进行识别时的误判问题。

In order to solve the problem of inaccurate damage identification result by using a single damage fingerprint in the process of bridge damage identification and improve the efficiency of damage identification,two kinds of damage indicators like curvature model difference and displacement model wavelet coefficient difference are put forward to perform the damage identification,and then carry out the damage identification after comprehensively comparing the damage identification results of the two indicators.Based on the numerical simulation of a cable-stayed bridge,the calculation is carried out according to the simulation data,and the method is verified.The research shows that,the application of two damage indicators is evaluated,so as to avoid the misjudgment problem when using a single damage indicator to perform the identification.