建筑物对塔机顺风向风力干扰效应研究  

Study on the Interference Effects of Building on the Along-Wind Load of Tower Crane

作　　者：林其涛 LIN Qitao(The 1st Engineering Co.,Ltd.of China Railway Urban Construction Group,Taiyuan Shanxi 030024,China)

机构地区：[1]中铁城建集团第一工程有限公司,山西太原030024

出　　处：《铁道建筑技术》2022年第5期24-29,42,共7页Railway Construction Technology

基　　金：中铁城建集团第一工程有限公司科技研究开发计划课题(2018-02)。

摘　　要：塔机在建筑物干扰下风力可能会发生很大变化。本文基于CFD数值方法,建立建筑物与塔机不同横向和纵向间距比模型,得到了12个风向角下有无建筑物干扰的塔机风力系数。定义顺风向风力干扰因子,系统研究了不同风向角下塔机塔身标准节和起重臂臂节干扰因子分布特征。结果表明:不同横向和纵向间距比及不同的风向角下,建筑物对塔机的干扰效应主要表现为遮挡效应。0°、30°和60°风向角下,塔身标准节风力干扰因子沿高度分布规律符合三次函数特征,且60°风向角下干扰因子最大为0.6左右。起重臂臂节干扰因子在1附近波动,120°和150°风向角下,干扰因子分布规律符合二次函数特征表现为遮挡效应,而90°和270°风向角下,近端起重臂臂节干扰因子始终表现为放大效应。The wind loads of tower crane may be changed greatly under the interference of building.Based on CFD numerical method,the building and tower crane model with different lateral and longitudinal spacing ratios were established,and wind load coefficients of tower crane with/without building around under 12 wind directions were obtained.By defining the along-wind interference factor,the distribution characteristics of interference factor of the mast section and the counter-jib section under different wind directions were systematically studied.The results show that the interference effect of building on tower crane under different lateral and longitudinal spacing ratios and different wind directions is mainly shielding effect.The distribution law of interference factor of mast section along the height accords with cubic function under 0°,30°and 60°wind directions,and the maximum value is about 0.6 at 60°wind direction.The interference factor of counter-jib section fluctuates around 1 under different wind directions,the distribution law of it is consistent with quadratic function as the shielding effect under 120°and 150°wind directions,while the interference factor of counter-jib section always exhibits the amplification effect under 90°and 270°wind directions.

关 键 词：风载荷 干扰效应 建筑物 塔机 CFD 

分 类 号：TU311.3[建筑科学—结构工程]