|本期目录/Table of Contents|

[1]史康,邓津锐,莫向前,等.基于车辆扫描法的任意边界桥梁频率识别理论研究[J].建筑科学与工程学报,2026,(02):130-140.[doi:10.19815/j.jace.2024.10092]
　SHI Kang,DENG Jinrui,MO Xiangqian,et al.Theoretical study on bridge frequency identification with arbitrary boundary condition using vehicle scanning method[J].Journal of Architecture and Civil Engineering,2026,(02):130-140.[doi:10.19815/j.jace.2024.10092]
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基于车辆扫描法的任意边界桥梁频率识别理论研究(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
期数:
2026年02期
页码:
130-140
栏目:
桥隧工程
出版日期:
2026-03-30

文章信息/Info

Title:
Theoretical study on bridge frequency identification with arbitrary boundary condition using vehicle scanning method
文章编号:
1673-2049(2026)02-0130-11
作者:
史康1,邓津锐1,莫向前1,杨永斌1,2,邓德帅1
(1. 重庆大学 土木工程学院,重庆 400045; 2. 重庆科技大学 土木与水利工程学院,重庆 401331)
Author(s):
SHI Kang1, DENG Jinrui1, MO Xiangqian1, YANG Yongbin1,2, DENG Deshuai1
(1. School of Civil Engineering, Chongqing University, Chongqing 400045, China; 2. School of Civil and Hydraulic Engineering, Chongqing University of Science and Technology, Chongqing 401331, China)
关键词:
桥梁工程;  频率识别;  理论推导;  车辆扫描法;  任意约束
Keywords:
bridge engineering;  frequency identification;  theoretical derivation;  vehicle scanning method;  arbitrary constraint
分类号:
U446.3
DOI:
10.19815/j.jace.2024.10092
文献标志码:
A
摘要:
为真实模拟桥梁边界条件,提出了采用平动和旋转弹簧模拟桥梁两端任意边界条件的力学模型,构建了基于车辆扫描法识别任意约束桥梁频率的分析理论。首先推导了任意边界条件下桥梁、车辆和接触点响应的解析解,给出了对应频率超越方程的求解方法及其振型函数的显式表达; 然后,通过对比分析验证了理论推导的正确性,证明了解析解可根据给定两端弹簧刚度大小自动退化至经典边界条件(简支、悬臂、固定等); 最后,系统讨论了弹簧支撑刚度、车速、桥梁阻尼比和路面粗糙度对识别结果的影响。结果表明:解析解能适用任意桥梁边界条件,可实现任意边界下的车桥耦合动力响应分析; 提出的方法在识别桥梁频率方面具有较强的鲁棒性,在不同支撑刚度、桥梁阻尼、车辆检测速度(低于10 m·s-1)下均能较好识别桥梁的前几阶频率; 路面粗糙度对桥梁频率识别影响较大,但采用接触点残余响应可极大程度剔除路面粗糙度的干扰; 研究进一步丰富了车辆扫描法的理论背景,可为桥梁快速检测提供技术参考。
Abstract:
In order to truly simulate the boundary conditions of the bridge, a mechanical model using the vertical and rotational springs to simulate the arbitrary boundary conditions at both ends of the bridge was proposed, and the theory based on the vehicle scanning method to identify the bridge frequencies under arbitrary constraints at both ends was proposed. Firstly, the analytical solutions of the vibration response of bridges, vehicles and contact points were derived, and the method to solve the frequency transcendental equation and the explicit expression of the mode function under arbitrary boundary conditions were given. Then, the correctness of the theoretical derivation was verified by comparative analysis. It was proved that the analytical solution could automatically degenerate to the classical boundary conditions i.e., simply supported, cantilever, fixed, etc., according to the given stiffness of the spring at both ends. Finally, the influences of spring support stiffness, vehicle speed, bridge damping ratio and road roughness on the identification frequencies were discussed systematically. The results show that the analytical solution can be applied to any bridge boundary conditions, and the vehicle-bridge coupling dynamic response analysis under any boundary can be realized. The proposed method has strong robustness in identifying bridge frequency. The first several frequencies of the bridge can be well identified under various support stiffness, bridge damping ratios, and running speeds(less than 10 m·s-1). Pavement roughness has a great influence on bridge frequency identification, but the residual response of contact point can eliminate the interference of pavement roughness to a great extent. The study further enriches the theoretical background of vehicle scanning method and can provide technical reference for bridge rapid detection.

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备注/Memo

备注/Memo:
收稿日期:2024-10-13
基金项目:国家自然科学基金项目(52378131); 重庆市留创计划项目创新类优秀项目(cx2022014)
作者简介:史 康(1988-),男,工学博士,副教授,E-mail:shikang@cqu.edu.cn。
通信作者:莫向前(1997-),男,工学博士研究生,E-mail:xqmo@cqu.edu.cn。
Author resume: SHI Kang(1988-), male, PhD, associate professor, E-mail: shikang@cqu.edu.cn; MO Xiangqian(1997-), male, doctoral student, E-mail: xqmo@cqu.edu.cn.
更新日期/Last Update: 2026-04-01