基于欧拉多相流模型的桥梁主梁三维风驱雨数值研究

发布时间：2018-06-07 00:00

本文选题：欧拉多相流模型 + 桥梁主梁　；参考：《工程力学》2017年04期

【摘要】：该文利用欧拉多相流模型,对矩形断面和准流线型断面的桥梁主梁进行了三维风驱雨数值模拟计算。通过计算,得到了桥梁主梁周围风雨流场的分布和主梁上雨滴平均冲击荷载分布,并重点探讨了降雨对桥梁主梁断面三分力系数的影响以及来流攻角和湍流强度的变化对风驱雨效应的影响。通过和相关风洞试验数据的比较,验证了欧拉多相流方法在桥梁工程风驱雨研究中的有效性和便利性,为桥梁工程风驱雨研究提供了一个新的手段。通过分析发现,降雨会影响桥梁主梁的三分力系数,但雨滴对主梁的平均冲击荷载相对于风荷载而言较小,影响并不显著;攻角和湍流强度的变化对风驱雨效应的影响亦不明显。
[Abstract]:Based on the Euler multiphase flow model, the 3-D wind driven rain numerical simulation of bridge girder with rectangular section and quasi streamline section is carried out in this paper. The distribution of wind and rain flow around the main girder and the average impact load distribution of raindrops on the main girder are obtained by calculation. The influence of rainfall on the three-point force coefficient of the bridge girder section and the influence of the angle of attack and the turbulence intensity on the wind-driven rain effect are discussed. The validity and convenience of Euler multiphase flow method in the study of wind drive rain in bridge engineering are verified by comparing with the relevant wind tunnel test data, which provides a new method for the study of wind drive rain in bridge engineering. Through analysis, it is found that rainfall will affect the three-point force coefficient of the main girder of the bridge, but the average impact load of the raindrop on the main beam is less than that of the wind load, and the effect is not significant. The influence of angle of attack and turbulence intensity on the effect of wind drive rain is not obvious.
【作者单位】：湖南大学土木工程系;中国科学技术大学工程科学系;香港城市大学建筑学与土木工程学系;长沙理工大学土木与建筑学院;
【基金】：国家基金面上项目(51378484) 国家自然科学基金重大研究计划项目(91215302) 交通运输部科技项目(2011318824140) 湖南省创新平台与人才计划项目(2015RS4050) 中国博士后基金项目(2015M572238) 湖南省教育厅一般项目(15C0054) 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项目;长沙理工大学“土木工程”重点学科项目
【分类号】：U441.3

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