基于车桥耦合振动分析的桥梁损伤诊断方法评述

车辆通过桥梁时,桥梁和车辆的动力响应都包含桥梁结构模态或者几何参数信息,对它们进行分析能识别桥梁的模态参数和损伤。结合国内外最新研究成果,综述基于车桥耦合振动分析的桥梁结构损伤识别技术,并与传统识别方法进行比较。指出其优缺点;详细介绍基于灵敏度分析和模型修正的方法、基于结构刚度搜索的方法、利用车辆响应傅立叶变换识别桥梁频率的方法、利用车激桥梁响应的小波变换识别桥梁模态参数的方法以及综合利用车辆和桥梁响应识别桥梁损伤的方法等5种参数识别与损伤诊断方法的基本原理,并总结上述方法的实施步骤和应用时应该注意的问题;指出了该领域的关键问题和进一步的研究方向。

Review on Bridge Structural Damage Identification Techniques Based on Bridge-vehicle Coupled Vibration Analysis

When the vehicle passes through the bridge,the dynamic responses of the bridge and dynamic responses of the vehicle can be used for modal parameter identification and damage detection of the bridge because they contain the modal or structural parameter information.Based on the latest researches at home and abroad,the bridge structural damage identification techniques based on bridge-vehicle coupled vibration analysis are summarized and compared with the traditional methods.Meanwhile,their advantages and disadvantages are investigated.The working principles of 5 methods(namely,the method based on sensitivity analysis and model modification,the method based on stiffness searching,the method using Fourier analysis of the vehicle dynamic response for frequency identification of the bridge,the method using the wavelet analysis of bridge dynamic response for extracting the modal parameters of the bridge,the method using the dynamic response of the vehicle and bridge for damage identification of the bridge) are introduced in detail.The procedures and the strategies in practical application of these methods are summarized.At last,the key problems and the further research directions in this area are pointed out.