摘要
基于有限元方法研究了移动车辆作用下带有转换裂缝的多片梁式桥动力响应。首先,基于断裂力学理论推导了裂缝梁单元的刚度矩阵,进而得到裂缝梁式桥的动力方程。其次,采用整车模型模拟移动车辆,根据达朗伯原理得到车辆运动方程,在此基础上,依据车-桥相互作用理论模型建立了车桥耦合系统的振动方程。通过模态叠加法对移动车辆作用下带有转换裂缝的多片式梁桥的动力响应进行了求解。最后,以存在裂缝的多片式简支T梁桥为例,分析得到了裂缝位置、车辆横桥向作用位置和桥面不平整度对动力响应的影响规律。
The dynamic response of multiple beam bridge with switching cracks under moving vehicles is investigated using finite element method.Firstly,the stiffness matrix of the cracked beam element is derived based on the fracture mechanics theory and the dynamic equation of the cracked beam bridge is obtained.Secondly,the vehicle motion equation is derived based on D'Alembert Principle by using the whole vehicle model to simulate the moving vehicle.Thirdly,the vibration equation of the vehicle-bridge coupling system is established according to the vehicle-bridge interaction theory model.Finally,the influence law of crack position,transverse bridge position for vehicle and bridge deck roughness on dynamic response is analyzed by taking the multiple simply supported T-beam bridge with cracks as an example.
作者
谭国金
姜霖
吴春利
孔庆雯
梁春雨
TAN Guo-jin;JIANG Lin;WU Chun-li;KONG Qing-wen;LIANG Chun-yu(College of Transportation,Jilin University,Changchun 130022,China)
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2020年第6期2147-2158,共12页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(51978309,11702108)
吉林省科技厅科技攻关项目(20190303052SF)
吉林省交通运输厅科技项目(2020-1-3,2020-3-3)
吉林省发展改革委项目(2019C041-5)
吉林省教育厅“十三五”科学技术项目(JJKH20190150KJ,JJKH20180152KJ).
关键词
桥梁工程
移动车辆
转换裂缝
多片式梁桥
动力响应
bridge engineering
moving vehicle
switching crack
multiple beam bridge
dynamic response
