车辆参数对车-桥耦合系统变截面连续梁桥损伤识别的影响

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Influence of vehicle parameters on damage identification of continuous beam bridge with variable cross-section based on vehicle-bridge coupling system

期刊信息

合肥工业大学（自然科学版），2023年1月，第46卷第1期：88-95，117

DOI: 10.3969/j.issn.1003-5060.2023.01.014

作者信息

黄鹏飞 $ ^{1} $，李雪峰 $ ^{1} $，茆尚权 $ ^{2} $

(1. 合肥工业大学土木与水利工程学院，安徽合肥 230009；2. 中建四局第六建设有限公司，安徽合肥 230011)

摘要和关键词

摘要: 文章研究车-桥耦合系统的非线性振动特性, 采用有限分段思想, 建立 1/4 车辆模型和变截面连续梁桥的车-桥耦合振动方程, 在 MATLAB 环境下编制基于 Runge-Kutta 算法的车-桥耦合振动数值分析程序, 得到桥梁跨中位移响应; 以某三跨混凝土连续梁桥为算例, 分析车桥质量比、车辆速度、车辆弹簧刚度、信噪比 4 组参数的变化对变截面连续梁桥损伤识别的影响。结果发现: 车桥质量比和信噪比较大时, 桥梁损伤识别效果较好; 较低的行车速度有利于桥梁的损伤识别研究; 车辆弹簧刚度的影响非常小, 可忽略不计。

关键词: 变截面连续梁桥；车-桥耦合振动；车辆参数；损伤识别

Authors

HUANG Pengfei $ ^{1} $, LI Xuefeng $ ^{1} $, MAO Shangquan $ ^{2} $

(1. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China; 2. China Construction Fourth Engineering Bureau Sixth Construction Co., Ltd., Hefei 230011, China)

Abstract and Keywords

Abstract: The nonlinear vibration characteristics of vehicle-bridge coupling system are studied. After establishing the vehicle-bridge coupling vibration equation of the common quarter vehicle model and continuous beam bridge with variable cross-section through the finite segmentation idea, the Runge-Kutta method was used to compile the corresponding numerical simulation program of vehicle-bridge coupling vibration under the MATLAB environment. The mid-span displacement response of bridge was obtained. Taking a three-span concrete continuous beam bridge as an example, the influence of four groups of parameters, including vehicle-bridge mass ratio, vehicle speed, vehicle spring stiffness and signal-to-noise ratio (SNR), on the damage identification of continuous beam bridge with variable cross-section was analyzed. The results show that when the vehicle-bridge mass ratio and SNR are large, the performance of bridge damage identification is better; lower driving speed is conducive to the bridge damage identification research; the influence of vehicle spring stiffness is very small, which can be ignored.

Keywords: continuous beam bridge with variable cross-section; vehicle-bridge coupling vibration; vehicle parameter; damage identification

基金信息

国家自然科学基金资助项目（51878234）

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