考虑风向和地形效应的某山区斜拉桥设计风速  

DESIGN WIND SPEED OF A CABLE-STAYED BRIDGE UNDER MOUNTAINOUS AREA CONSIDERING WIND DIRECTION AND TERRAIN EFFECT

作　　者：张帅光 张坤 张姚 ZHANG Shuaiguang;ZHANG Kun;ZHANG Yao(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;China United Engineering Co.,Hangzhou 310051,China)

机构地区：[1]浙江大学建筑工程学院,杭州310058 [2]中国联合工程公司,杭州310051

出　　处：《低温建筑技术》2020年第8期57-60,64,共5页Low Temperature Architecture Technology

摘　　要：为了研究群山环境下某代建人行斜拉桥的设计风速,采用风速风向联合分布概型法分析风向对基本风速的折减效应,采用地貌模型风洞试验来研究地形效应对桥梁设计风速的影响。结果表明忽略风向会高估基本风速,地形效应会对桥址处平均风速产生显著影响。确定群山环境中桥梁设计基准风速需考虑风向和地貌地形的综合影响。To study the design wind speed of a generation of pedestrian cable-stayed bridge under the environment of mountains, the reduction effect of wind direction on the basic wind speed is analyzed by the method of joint distribution of wind speed and wind direction. Meanwhile, the effect of terrain effect on the design wind speed of the bridge is studied by the wind tunnel test of geomorphic model. The results show that the winds direction ignoring will overestimate the basic wind speed, and the terrain effect will have a significant impact on the average wind speed at the bridge site. For further determination of the design reference winds speed of bridges in mountainous environment, the comprehensive influence of wind direction and landform should be considered.

关 键 词：风速风向联合分布 地貌模型 风洞试验 地形效应 

分 类 号：TU311.3[建筑科学—结构工程]