考虑车流荷载的大跨梁桥行车舒适性分析  

Analysis on driving comfort of large-span girder bridges considering traffic flow load

作　　者：冯东明[1,2] 王保全 夏烨 黎剑安 刘朵[2,4] FENG Dongming;WANG Baoquan;XIA Ye;LI Jian’an;LIU Duo(School of Civil Engineering,Southeast University,Nanjing 211189,China;National Key Laboratory of Safety,Durability and Healthy Operation of Long Span Bridges,Southeast University,Nanjing 211189,China;School of Civil Engineering,Tongji University,Shanghai 200092,China;JSTI Group Co.,Ltd.,Nanjing 210018,China)

机构地区：[1]东南大学土木工程学院,南京211189 [2]东南大学长大桥梁安全长寿与健康运维全国重点实验室,南京211189 [3]同济大学土木工程学院,上海200092 [4]苏交科集团股份有限公司,南京210018

出　　处：《东南大学学报(自然科学版)》2025年第2期468-476,共9页Journal of Southeast University:Natural Science Edition

基　　金：国家重点研发计划资助项目(2023YFC3805900);江苏省交通运输科技与成果转化计划资助项目(2024Y15);东南大学新进教师科研启动经费资助项目(RF1028623149).

摘　　要：为探讨车流荷载对车辆通过大跨梁桥时乘员舒适性的影响,综合考虑了不同类型的车辆模型,基于车桥耦合振动理论计算了车辆座椅位置的响应。采用国际标准ISO‐2631规定的1/3倍频程分析法研究了不同荷载工况下的行车舒适性,并对主要影响因素开展了参数敏感性分析。此外,结合桥梁实际监测的车流数据,基于ISO‐2631中的计权加速度均方根值法,从样本角度对行车舒适性进行了统计分析。研究结果表明:不同车辆荷载工况对大跨梁桥的响应具有显著影响,但在考虑路面平整度因素后,车辆响应变化较小,进而导致行车舒适性差异不明显;车速降低和车重增加虽能在一定程度上改善行车舒适性,但其作用相对较小;路面平整度是影响大跨梁桥行车舒适性的关键因素,路面状况恶化会引发更加剧烈的车桥耦合振动,进而显著降低舒适性。To explore the influence of traffic load on passenger comfort when vehicles pass through the large-span girder bridge,different types of vehicle models were comprehensively considered and the response of vehicle seat position was computed based on vehicle-bridge interaction theory.The 1/3 octave band method specified in the international standard ISO-2631 was used to study the driving comfort under different load conditions,and parameter sensitivity analysis of the main influencing factors was conducted.In addition,based on the actual measured traffic data of the bridge and the ISO-2631 weighted acceleration root mean square method,a statistical analysis of driving comfort was conducted from a sample perspective.The results show that different vehicle load conditions have a significant impact on the response of the large-span girder bridge,but when considering road surface roughness,the varies of vehicle response are relatively small,resulting in insignificant differences in driving comfort.Although reducing vehicle speed and increasing vehicle weight can improve driving comfort to some extent,their impact is relatively small.The road roughness is still a key factor affecting the driving comfort of large-span girder bridges.Deterioration of road conditions can cause more severe vehicle-bridge interaction vibration,thereby significantly reducing comfort.

关 键 词：行车舒适性 车桥耦合 大跨梁式桥 车流荷载 功率谱密度 加速度均方根值 

分 类 号：TU398[建筑科学—结构工程]