桥梁抖振力空间相关性对风-车-桥耦合动力响应的影响  

Effect of the Coherence of Buffeting Forces of Bridges on the Coupled Dynamic Responses of Wind-vehicle-bridge System

作　　者：韩艳[1] 陈浩[1] 刘跃飞[1] 蔡春声[1,2] 张建仁[1] 

机构地区：[1]长沙理工大学桥梁工程安全控制省部共建教育部重点实验室,湖南长沙410114 [2]美国路易斯安那州立大学土木与环境工程系,路易斯安那巴吞鲁日70803

出　　处：《湖南大学学报（自然科学版）》2015年第9期82-88,共7页Journal of Hunan University:Natural Sciences

基　　金：国家重点基础研究计划(973计划)资助项目(2015CB057706);国家自然科学基金资助项目(51178066;51208067;51278069);长沙理工大学桥梁工程安全控制省部共建教育部重点实验室开放基金资助项目(12KB01);交通部西部交通科技项目重大科技专项资助项目(2011318824140)~~

摘　　要：基于提出的抖振力模型和建立的风-车-桥耦合振动模型,发展了一种可以考虑抖振力空间相关性的风-车-桥耦合振动分析方法,并编制了相应的计算程序.以江顺长江大桥为工程背景,测试了桥梁抖振力的空间相关性和考虑车桥耦合作用的车桥气动参数,分析研究了桥梁抖振力空间相关性对侧风作用下桥梁和车辆耦合动力响应的影响.研究结果表明:桥梁抖振力空间相关性对桥梁动力响应有显著影响,对车辆的动力响应也有一定的影响.Based on the buffeting force model and the model for the wind-vehicle-bridge system presen-ted in the paper,an approach to study the coupling vibration of wind-vehicle-bridge system considering the coherence of buffeting forces was developed and the corresponding calculating program was built.The ap-plication of the proposed methodology on the Jiangshun Bridge in China was presented as a numerical ex-ample.The coherence of the buffeting forces of the bridge and the aerodynamic parameters of the bridge and the vehicle considering the aerodynamic interference between the bridge and the vehicle were measured in wind tunnel.The effect of the coherence of buffeting forces of the bridge on the dynamic performance of both the bridge and the vehicles under cross winds were discussed.It is found that the coherence of the buffeting forces of the bridge has significant effect on the dynamic responses of the bridge,and some im-pact on the dynamic responses of the vehicle.

关 键 词：大跨度斜拉桥 风工程 风 车 桥系统 耦合动力分析 抖振响应 相关性 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]