摘要
风荷载是超高层建筑结构设计的关键荷载,风荷载的时变特性导致其难以准确预测。以迪拜超高层五星级酒店公寓SABAH ROTANA项目为研究对象,采用仿真分析方法研究超高层框架核心筒结构表面风压场和平均风压系数。研究结果表明,核心筒结构表面正风压整体上呈从建筑底部向顶部逐渐增大的趋势,最大正风压出现在迎风面1/3建筑高度以上部分;核心筒结构表面负风压分布不均,最大负风压出现在1/3建筑高度附近;核心筒结构迎风面负风压明显大于侧风面,背风面和侧风面负风压变化较接近;最不利工况下核心筒结构迎风面存在较大的正风压,背风面存在较稳定的负风压,随着风向角的增加,平均风压系数峰值不断增大。
Wind load is a key load in the design of super high-rise building structures,and its time-varying characteristics make accurate prediction difficult.The SABAH ROTANA project is taken as the research object,which is a super high-rise five-star hotel apartment in Dubai.Simulation analysis is used to study the extreme wind pressure field and average wind pressure coefficient on the surface of the core tube structure of the high-rise frame.The results show that the positive wind pressure of the structure generally shows a trend of gradually increasing from the bottom to the top.The maximum positive wind pressure occurs in the part above 1/3 of the building height on the windward side.The negative wind pressure of the structure is significantly unevenly distributed,with the maximum negative wind pressure value occurring near 1/3 of the building height.The wind pressure value on the length facade of the building on the windward side is significantly greater than that on the width facade,while the wind pressure value on the length facade of the building on the leeward side is closer to that within the width.The section under the most unfavorable working condition exhibits a significant positive wind pressure on the windward side,and a relatively stable negative wind pressure on the leeward side.As the wind direction angle increases,the peak value of the average wind pressure coefficient continuously increases.
作者
黄立敏
HUANG Limin(China Railway 18th Bureau Group Co.,Ltd.,Tianjin300222,China)
出处
《施工技术（中英文）》
CAS
2024年第3期94-98,128,共6页
Construction Technology
基金
中铁十八局集团有限公司科技创新项目(C21-12)。
关键词
高层建筑
框架
核心筒
风荷载
反演
仿真分析
tall buildings
framework
core tube
wind load
inversion
simulation analysis
