基于车-桥耦合的钢波纹板动力分析方法对比研究  

Contrastive Research on Dynamic Analysis Methods of CSP Structure Based on Vehicle-bridge Interaction

作　　者：李百建[1,2] 符锌砂 朱良生[1] LI Baijian;FU Xinsha;ZHU Liangsheng(Civil Engineering and Transportation school,South China University of Technology,Guangzhou,Guangdong 510641,China;Tianhe College of Guangdong Polytechnic Normal University.Guangzhou,Guangdong 510540,China)

机构地区：[1]华南理工大学土木与交通学院,广东广州510641 [2]广东技术师范大学天河学院土木工程系,广东广州510540

出　　处：《公路工程》2019年第6期1-8,32,共9页Highway Engineering

基　　金：2015年度湖南省交通运输厅科技进步与创新项目计划(201539);国家自然科学基金资助项目(51278202)

摘　　要：钢波纹板结构在车辆运行下的动力分析主要依赖于实验,为了弥补实验的不足,基于3种车-桥耦合模型,以一座跨径为6.32 m的大波形钢波纹板桥梁为数值算例,对钢波纹板结构的动力分析方法做对比研究,并分析不同车速下的结构动力性能,结果表明:采用移动荷载模型分析本文数值算例较为合理;奇数测点的最大动应变分析值高于实测值,而偶数测点的最大动应变低于实测值,说明将钢波纹板等效为材料异性的矩形板会低估桥梁横向应变;实测阻尼均值为0.31,分析阻尼均值为0.197,误差约35%;10 km/h时应变增大系数为1.18,20 km/h时应变增大系数为1.41,30 km/h时应变增大系数为1.60;钢波纹板结构的动力性能与车速有关,位移、应变和动力增大系数在某一特定车速下达到最大值。Dynamic research on Corrugated Steel Plate Structures relies on dynamic experiments,in order to make up the inadequacy of dynamic experiments,a Super Cor.bridge with span of 6.32 m was taken as a numerical example,contrastive research on dynamic analysis methods of Corrugated Steel Plate Structures was executed based on vehicle-bridge interaction,and the dynamic performance was also analyzed.Results show that using moving load model to analyze numerical example is more reasonable;maximum dynamic strains on odd points are higher than the measured values,and maximum dynamic strains on even points are lower than the measured values,which illustrate that equivalent anisotropy material rectangular plate model will underestimate the transverse stains;average measured damping value is 0.31,average analysis damping value is 0.197,the error is about 35%;Dynamic Amplification Factor is 1.18 at 10 km/h,1.41 at 20 km/h and 1.60 at 30 km/h;The dynamic performance of the Corrugated Steel Plate Structures is closely related to the vehicle speed,the displacements,strains and DAFs reach their peaks at a particular speed.

关 键 词：道路工程 钢波纹板结构 车-桥耦合 刚度等效 动力分析 

分 类 号：U44[建筑科学—桥梁与隧道工程]