摘要
为研究多车辆过桥时车辆间相互作用与桥梁结构的耦合振动响应规律,文章利用Ansys软件及其APDL语言,编制出基于Ansys单一环境下的车桥耦合振动分析模块,并通过与有关文献对比验证该模块的正确性。利用该方法对多车道连续梁桥在各复杂行驶工况下的车桥耦合振动响应进行分析计算,总结挠度、弯矩冲击系数的变化规律。研究表明,不同车道的车辆行驶状态对连续梁各截面冲击系数影响较大,不同车速对各截面冲击系数虽有影响但无明显规律;车辆行驶间距接近桥梁单孔跨径时,同向及对向行驶产生的冲击系数均较大;集中力模型不适用于路面平整度较差状况下的耦合振动分析;随着路面平整度状况的下降,冲击系数呈非线性增长趋势。
In order to study the response laws for the coupling vibration of vehicle-bridge and vehicle interaction when multiple vehicles pass a continuous beam at the same time,the Ansys software with APDL language is used to program a vehicle-bridge coupling vibration analysis module.Verified by the classic references,the algorithm is used to calculate the vehicle-bridge coupling vibration response of the multilane continuous beam bridge as several vehicles corss the bridge together at common speeds,and the variation rules of the deflection and moment impact coefficient at certain sections of the beam are obtained.The results show that the impact coefficient of each section of the continuous beam is obviously influenced by the vehicles driving state on different lanes,and affected by the different driving speeds without obvious rules.The impact coefficient is great when multiple vehicles drive in the same or opposite direction with single span spacing and increases in a nonlinear trend with the decline of pavement roughness conditions.The concentrated force model is no longer suitable for vehicle-bridge coupling vibration analysis under poor pavement roughness conditions.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第8期1222-1226,1236,共6页
Journal of Hefei University of Technology：Natural Science
基金
交通部西部交通建设科技资助项目(200831881232)
关键词
桥梁工程
车桥耦合振动
冲击系数
多车辆
连续梁
bridge engineering
vehicle-bridge coupling vibration
impact coefficient
multiple vehicles
continuous beam
