HEC-RAS三维河道水力分析计算系统在桥梁优化设计的应用研究

基于计算流体动力学的方法,运用三维河道水力学模型HEC-RAS(River Analyse System)分析阿尔及利贝贾亚高速公路在建项目2号互通桥梁在百年一遇的最大洪峰流量下,不同桥梁孔跨方案在相同地质条件下对桥梁最大冲刷深度的影响,对不同桥梁孔跨方案下三维河道水力学模型计算结果进行分析研究,确定经济合理的桥梁设计方案,为今后国内外同类桥梁设计的方案研究提供了新的研究方法。

Application Study on HEC-RAS Three-dimensional River Hydraulic Calculation and Analysis System for Bridge Design Optimization

Based on computational fluid dynamics,and using three-dimensional river hydraulic model HEC-RAS( River Analyse System),this paper took the interchange bridge No. 2 as the research object,which is situated on the Bejaia Express Highway in Algeria and was still under construction. Meanwhile,under the same geological condition and with once-in-a-hundred-year flood peak flow,the paper analyzed the influences of different bridge span schemes on the maximum bridge scouring depth. And then in this paper,the calculation results of three-dimensional river hydraulic model under the condition of different bridge span schemes were analyzed and researched,and finally an economical and reasonable bridge design scheme was determined. This paper provides a new research approach of scheme design for similar bridges at home and abroad in future.