摘要
目前国内跨越峡谷等复杂地形的大跨度桥梁建设日益增多,而现有的抗风规范对于复杂山区地形风速剖面的计算没有明确的规定,也没有地形影响修正方法。针对山区地形地表类别不易确定,风环境复杂这一问题,结合山西省禹门口黄河斜拉桥这一实际工程,利用自行开发的桥梁风场特性分析系统对桥址处一年多实测风速数据进行分析计算,得到了桥址处平均风速和风向、湍流度、湍流积分尺度、功率谱密度等强风特性,并将分析结果与FLUENT的数值模拟结果进行对比,验证了程序的可靠性和有效性,为主桥风洞试验及颤振、抖振分析和结构分析时风荷载计算提供了依据。
Now construction of large- span bridges spanning complicated landform including valleys become more and more, but in the existing anti - wind specification there is not the explicit regulations of wind - profile calculation for complex mountainous region and correcting method of topographical effect is not suggested. The paper is aiming at the problem that the land cover class in Mountain Terrain is difficult to be determined, combining the actual engineering- Shanxi Yumenkou Yellow River Bridge. A data processing system of wind speed observation based on Borland C ＋ ＋ Builder is compiled. Through the analysis for one- year fidd measured data, strong wind characteristics such as, the mean wind velocity, direction, turbulence intensity and turbulence integral length are obtained and the results are compared with that of numerical simulation by FLUENT. The result of analysis testifies the reliability and efficiency of the program. It provides the bases for wind tunnel test, flutter and buffeting analysis and wind load calculation.
出处
《武汉理工大学学报》
EI
CAS
CSCD
北大核心
2008年第12期154-159,共6页
Journal of Wuhan University of Technology
关键词
山区桥梁
风环境
风观测
数值模拟
mountain bridge
wind environment
wind observation
numerical simulation
