湛江新机场航站楼屋盖结构分区等效静风荷载研究  

Partitioned Equivalent Static Wind Load Research for Zhanjiang New Airport Terminal Roof Structure

作　　者：区彤 张佳武 陈进于 冯若强[2] OU Tong;ZHANG Jiawu;CHEN Jinyu;FENG Ruoqiang(Guangdong Architectural Design&Research Institute Co.,Ltd.,Guangzhou 510010,China;School of Civil Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]广东省建筑设计研究院有限公司,广州510010 [2]东南大学土木工程学院,南京211189

出　　处：《建筑钢结构进展》2022年第6期92-100,共9页Progress in Steel Building Structures

摘　　要：对湛江新机场航站楼屋盖结构的屋面风荷载特性和时域法风振响应特性进行研究,分别采用分区风振系数法、分区多目标法和分区约束多目标法计算屋盖结构的等效静风荷载。结果表明:屋盖表面平均风压主要表现为负压,在垂直于风向角的屋盖迎风前缘负压最大,距离迎风前缘越远风压逐渐减小,脉动风压变化规律与平均风压基本相同。屋盖结构最大风振响应处主要位于屋面悬挑区域,结构设计时需重点关注该区域的响应。分区风振系数法等效风压分布合理,但等效响应整体误差大。以少量分区脉动风压为荷载基本向量的分区多目标法等效响应整体精度高;考虑约束方程的分区约束多目标法等效响应整体精度有所下降,但分区风压变化均匀连续,等效风压分布合理,便于工程应用。Taking the practical engineering of the roof structure of Zhanjiang New Airport Terminal as an example,the wind load characteristics and time-domain method for the wind-induced response characteristics are studied in this paper.Besides,the methods of partitioned wind-induced vibration coefficient equivalence,partitioned multi-objective equivalence,and partitioned constrained multi-objective equivalence are used to calculate the equivalent static wind load of the roof structure.The conclusions are as follows.Firstly,the average pressure of roof wind is mainly characterized by negative pressure,but the largest negative pressure lies in the windward edge of the roof structure,which is vertical to the wind direction.The wind pressure decreases as the distance gets further,and the change rule of fluctuating wind pressure and average wind pressure is basically the same.Secondly,the maximum wind-induced response of roof structure lies in the cantilever area.Thus,it is necessary to focus on this area when the structure is designed.Thirdly,the distribution of equivalent wind pressure by the partitioned wind vibration coefficient is reasonable,but the error of the equivalent response is significant.The equivalent response is accurate using the partitioned multi-objective method.At the same time,the accuracy is decreased using the partitioned constrained multi-objective method.However,the partitioned wind pressure changes are uniform and continuous,and the equivalent wind pressure distribution is reasonable,which is convenient for engineering applications..

关 键 词：大跨度屋盖 风振响应分析 分区多目标等效 等效静风荷载 

分 类 号：TU393.3[建筑科学—结构工程]