钢桥面铺装表面动水压力仿真分析  

Numerical Simulation of Hydrodynamic Pressure on Steel Bridge Deck Pavement

作　　者：张勐[1] 钱振东[1] 许静[2] 薛永超[1] 

机构地区：[1]东南大学智能运输系统研究中心,南京市210096 [2]国家知识产权局专利局专利审查协作江苏中心,苏州市215000

出　　处：《公路》2016年第3期42-46,共5页Highway

基　　金：国家自然科学基金项目;项目编号51178114

摘　　要：钢桥面铺装表面动水压力的存在,既会降低钢桥面铺装的抗滑性能,又会破坏防水黏结层并腐蚀钢板。为了研究不同工况对钢桥面铺装表面动水压力的影响,采用FLUENT建立轮胎在有水膜钢桥面铺装层表面行驶的有限元模型,模拟不同行驶速度、不同水膜厚度及不同花纹深度等条件,并计算钢桥面铺装层表面的动水压力值。研究结果表明动水压力的形成原因是:车辆高速行驶时,流向轮胎接地区域的水量超出轮胎花纹的排水能力,少量的水通过轮胎纵向花纹排出,大量的水在胎面前端滞留,形成动水压力;在车辆不产生滑水的情况下,水膜厚度越厚、行驶速度越高,产生的动水压力越大;轮胎花纹磨损量的增加对排水不利,已磨损轮胎产生的动水压力值比新轮胎产生的动水压力值大。The existence of hydrodynamic pressure on steel bridge deck pavement will reduce the antisliding performance of steel bridge,destroy the water proofing layer and corrode the steel deck.The hydrodynamic pressure on steel bridge deck pavement under different condition is studied in the paper.FLUENT is used to build a CFD model to calculate hydrodynamic pressure on steel bridge deck pavement under different driving speeds,different thicknesses of water film and different tread depths of tire.Results indicate that when vehicle is at high speed and the water flowing to tire is beyond the drainage capability of the tread pattern,a little water can get through tread pattern while a lot of water will stay in front of tire,which will lead to the formation of hydrodynamic pressure;when the water skiing does not occur,the increase of tread depth and driving speed will lead to the increase of hydrodynamic pressure;the wear of tread pattern is not good for drainage and the worn tire is easier to generate hydrodynamic pressure than the new tire.

关 键 词：钢桥面铺装 动水压力 行驶速度 水膜厚度 轮胎花纹深度 

分 类 号：U443.33[建筑科学—桥梁与隧道工程]