Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (2): 515-522.doi: 10.13229/j.cnki.jdxbgxb20210678

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Numerical analysis method of vehicle⁃bridge coupling vibration of curved bridge

Zhi-qiang HAN1(),Gang XIE2(),Yong-jun ZHOU3,Shi-zhong LIU1,Min-jie JIN1   

  1. 1.School of Vehicle and Transportation Engineering，Taiyuan University of Science and Technology，Taiyuan 030024，China
    2.Shanxi Key Laboratory of Advanced Control and Equipment Intelligence，Taiyuan University of Science and Technology，Taiyuan 030024，China
    3.Engineering Research Center for Large Highway Structure Safety of the Ministry of Education，Chang'an University，Xi'an 710064，China
  • Received:2021-07-16 Online:2023-02-01 Published:2023-02-28
  • Contact: Gang XIE E-mail:hzqjl1987@163.com;xiegang@tyust.edu.cn

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Abstract:

In order to study the variation of vehicle-bridge coupling vibration response of curved bridge， based on the principles of modal synthesis， a 15-degree-of-freedom five-axis trailer space model was established. Taking a 50+100+50 m three-span curved continuous beam bridge （R=600 m） as a calculation example to obtain bridge modal information. Based on the wheel-bridge displacement relationship， a vehicle-bridge coupling numerical analysis method for curved Bridges is proposed， and the influence of vehicle speed， road unevenness， radius of curvature and vehicle load on the dynamic response of curved bridges was discussed. The results show that road roughness and vehicle load are the main sensitive parameters that affect the dynamic response of the bridge. The impact of vehicle speed on curved bridges is complex， and it is difficult to find its regularity. The change in the radius of curvature has a greater impact on the torsion angle of the birdge. The influence of the vertical displacement of the main girder is relatively small. The relevant research results can provide theoretical guidance for dynamic safety assessment of such bridges.

Key words: bridge and tunnel engineering, vehicle-bridge coupled vibration, modal synthesis method, dynamic response, sensitivity factor

CLC Number: 

  • U442.5

Fig.1

15-standard vehicle load elevation layout"

Fig.2

Dynamic model of five-axis space trailer"

Fig.3

Geometric relationship between bridge and wheel"

Fig.4

Wheel-bridge mechanics relationship"

Fig.5

General layout of curved bridge （cm）"

Table 1

Statistical table of natural vibration characteristics of curved bridge"

模态阶数频率/Hz自振特性特点
11.2543面内扭转和侧向振动
22.4757平面内扭转
33.2123一阶侧向弯扭耦合振动
43.7030一阶反对称竖向弯曲振动
54.9211一阶对称竖向弯曲振动
65.8418二阶反对称竖向弯曲振动
77.5409反对称扭转振动
88.8701二阶对称竖向弯曲振动
99.2572一阶反对称竖向弯扭振动
109.5019对称扭转振动

Fig.6

Dynamic response curves of vertical displacement of the bridge at different speeds"

Fig.7

Influence of the maximum value of bridge dynamic response with the change of vehicle speed"

Fig.8

Influence of maximum value of bridge dynamic response with the change of road roughness"

Fig.9

Influence of the maximum value of bridge dynamic response with the change of different curvature radius"

Fig.10

Influence of maximum value of bridge dynamic response with the change of vehicle loads"

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