风环境下大跨度斜拉桥上的车辆驾驶舒适性评价  

Ride Comfort Assessment of Vehicles Running on Long-span Cable-stayed Bridge Under Crosswind

作　　者：韩万水[1] 陈艾荣[2] 

机构地区：[1]长安大学桥梁与隧道陕西省重点实验室,陕西西安710064 [2]同济大学桥梁工程系,上海200092

出　　处：《中国公路学报》2008年第2期54-60,共7页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(50478109);交通部重点科技项目(2003319H01010)

摘　　要：建立了风环境下行驶于大跨度桥梁上的车辆驾驶舒适性评价体系。在综合考虑汽车-桥梁系统空间耦合关系的基础上,提出了能够考虑桥梁的静风响应、抖振响应、汽车-桥梁耦合振动、系统的时变特性以及结构几何非线性和气动荷载非线性影响的风-汽车-桥梁系统空间耦合分析模型,该模型可以预测风环境下桥梁上通行车辆的行驶安全性及驾驶舒适性;建立了车辆驾驶员位置处驾驶舒适性评价方法,并采用ISO 2631-1—1997标准对不同路面粗糙度下行驶于杭州湾跨海大桥的车辆驾驶舒适性进行了评价。评价结果表明:路况越差,车辆的驾驶舒适性越差,且所计算工况下车辆的竖向和侧向驾驶舒适性均满足ISO 2631-1—1997标准。An evaluation system of ride comfort of road vehicles running on a long-span bridge under crosswind was established. A three-dimensional dynamic model of the wind-vehicle-bridge coupling vibration was presented, in which the effects of bridge deformation due to static wind loads, buffeting-induced bridge responses, vehicle-bridge coupling vibration, wind loads on vehicle, time-variation property of system, structural geometrical nonlinearity and aerodynamic nonlinearity were included. It could predict the travel safety and the ride comfort of vehicles running on long-span bridge under crosswind. The ride comfort assessment method for road vehicle at driver seat was established. Ride comfort of the box-type truck under various conditions of road roughness was investigated for the vehicle running on Hangzhou Bay Crossingsea Bridge with crosswind by using criteria ISO 2631-1-1997. The results show that the worse the road condition is, the worse the ride comforts of vehicles are; the ride comfort of the vehicle can satisfy both the vertical and lateral comfort criteria specified in ISO 2631-1-1997.

关 键 词：桥梁工程 风-汽车-桥梁系统 1/3倍频带分析 驾驶舒适性评价 路面粗糙度 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]