[1]张洪亮,王晓锋,吕文江,等.基于行车振动加速度的路桥过渡段差异沉降理论反算方法[J].长安大学学报(自然科学版),2025,45(5):1-14.[doi:10.19721/j.cnki.1671-8879.2025.05.001]
　ZHANG Hong-liang,WANG Xiao-feng,LYU Wen-jiang,et al.Theoretical back-calculation method for differential settlement of bridge-subgrade transition section based on vehicle vibration acceleration[J].Journal of Chang’an University (Natural Science Edition),2025,45(5):1-14.[doi:10.19721/j.cnki.1671-8879.2025.05.001]
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基于行车振动加速度的路桥过渡段差异沉降理论反算方法()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第45卷
期数:
2025年5期
页码:
1-14
栏目:
道路工程
出版日期:
2025-09-30

文章信息/Info

Title:
Theoretical back-calculation method for differential settlement of bridge-subgrade transition section based on vehicle vibration acceleration
文章编号:
1671-8879(2025)05-0001-14
作者:
张洪亮1; 王晓锋1; 吕文江2; 汤祖杰3
(1. 长安大学 公路学院,陕西 西安 710064; 2. 陕西交通控股集团有限公司,陕西 西安 710075; 3. 福建省交通建设质量安全中心,福建 福州 350001)
Author(s):
ZHANG Hong-liang1;  WANG Xiao-feng1;  LYU Wen-jiang2;  TANG Zu-jie3
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Shaanxi Transportation Holding Group Co., Ltd., Xi'an 710075, Shaanxi, China; 3. Transportation Construction Quality and Safety Center of Fujian Province, Fuzhou 350001, Fujian, China)
关键词:
道路工程;  桥头跳车;  振动加速度;  差异沉降;  拉普拉斯变换
Keywords:
road engineering;  vehicle bump at bridgehead;  vibration acceleration;  differential settlement;  Laplace transform
分类号:
U416.1
DOI:
10.19721/j.cnki.1671-8879.2025.05.001
文献标志码:
A
摘要:
为满足路桥过渡段差异沉降快速检测需求,基于行车振动加速度提出了一种理论反算方法,构建了1/4车辆模型,分别为设与不设搭板的路桥过渡段建立了台阶状和折线状模型; 根据牛顿第二定律推导出车辆经过路桥过渡段时的受迫振动方程,并通过拉普拉斯变换将其转化为齐次方程进行求解,从而在频域内建立了行车振动加速度与路桥过渡段差异沉降的理论关系式; 考虑车辆行驶方向对振动响应的影响,将车辆经过路桥过渡段分为上桥和下桥2种工况,分别建立了车辆通过设与不设搭板的路桥过渡段时的初始条件和路面位移; 进行了车辆跌落试验,基于模态参数理论构建了车辆模态参数与物理参数的关联体系,进而运用遗传算法确定了车辆的物理参数; 在此基础上,建立了基于行车振动加速度的路桥过渡段差异沉降理论反算方法,并对其进行了实地校验。研究结果表明:利用行车振动加速度理论反算出的路桥过渡段差异沉降与实测值的误差小于0.25 cm,最小误差率为6.00%,最大误差率为13.16%,平均误差率为8.89%,因此,相对误差率小于14%; 误差主要来源于车辆轮胎接触面积较大时的动态过程简化、台阶前路面不平整的叠加激励和车辆参数识别精度; 提出的方法对设与不设搭板的路桥过渡段均适用,仅车辆经过桥头时所受到的路面激励不同,可用于检测路桥过渡段差异沉降。
Abstract:
To meet the requirement for rapid detection of differential settlement of bridge-subgrade transition section, a theoretical back-calculation method was proposed based on vehicle vibration acceleration. A quarter-vehicle model was constructed, a step-like model and a broken-line model were established for bridge-subgrade transition sections with and without approach slab, respectively. According to Newton's second law, the forced vibration equation of a vehicle passing through the bridge-subgrade transition section was derived, and the Laplace transform was used to transfer the equation into a homogeneous equation for solving. Thus, a theoretical relationship between vehicle vibration acceleration and differential settlement of bridge-subgrade transition section was established in frequency domain. Considering the influence of vehicle driving direction on vibration responses, the vehicle passing through the bridge-subgrade transition section was divided into entry onto the bridge and egress from the bridge. The initial conditions and pavement displacements when the vehicle passing through the bridge-subgrade transition sections with and without approach slab were established, respectively. Vehicle drop tests were conducted to develop a correlative framework between modal parameters and physical parameters of the vehicle based on the modal parameter theory. Furthermore, the genetic algorithm was used to determine the physical parameters of the vehicle. On this basis, a theoretical back-calculation method for differential settlement of the bridge-subgrade transition section based on vehicle vibration acceleration was established and field-verified. The research results show that the error between the theoretically back-calculated differential settlement of the bridge-subgrade transition section using the vehicle vibration acceleration and the measured value is less than 0.25 cm. The minimum error rate is 6.00%, the maximum error rate is 13.16%, and the average error rate is 8.89%. So the relative error rate is less than 14%. The error primarily stems from the simplification in dynamic process when the vehicle tire contact areas are large, the superimposed excitation from uneven pavement before the step, and the vehicle parameter identification accuracy. The proposed method is applicable to bridge-subgrade transition sections both with and without approach slab, with the only difference being the road excitation imposed on the vehicle when passing through the bridgehead. It can be used to detect the differential settlement of the bridge-subgrade transition section.4 tabs, 9 figs, 30 refs.

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备注/Memo

备注/Memo:
收稿日期:2025-03-20
基金项目:国家自然科学基金项目(51978075); 陕西省交通运输科研项目(23-67K); 福建省交通运输科技项目(202305)
作者简介:张洪亮(1974-),男,山东枣庄人,教授,博士研究生导师,E-mail:zhliang0105@163.com。
更新日期/Last Update: 2025-09-30