大跨双坡屋盖结构等效静风荷载参数分析  

Parameter Analysis of Equivalent Static Wind Loads on Large-span Gable-roofed Structures

作　　者：王子通 周岱[1,2] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]上海交通大学高新船舶与深海开发装备协同创新中心,上海200240

出　　处：《科学技术与工程》2017年第22期278-288,共11页Science Technology and Engineering

基　　金：国家自然科学基金(51278297;51679139);高等学校博士学科点专项科研基金(20130073110096)资助

摘　　要：等效静风荷载是描述大跨空间结构动力风荷载的有效方式。运用Ansys软件进行结构风致响应时程分析,进而研究大跨双坡屋盖结构等效静风荷载。针对风向角、屋面坡度、结构高度和跨度等参数,系统性开展双坡屋盖结构的等效静风荷载的参数分析,为工程设计提供参考依据。研究表明,在0°风向角下,屋盖结构等效静风荷载值最大;随着风向角增大,结构的等效静风荷载减小;随着结构高度和跨度的增加,结构等效静风荷载增大,且其分布发生变化;屋面坡度对于结构等效静风荷载的影响较为复杂,适当增大屋面坡度对结构抗风有利。Equivalent static wind loads（ESWL） is an effective way to describe the dynamic wind loads on large-span space structures.By using Ansys to analyze the wind-induced dynamic response of the structures,the equivalent static wind loads on large-span gable-roofed structures is well performed.Considering parameters such as wind direction,roof slope,structural height and span,parameter analysis of equivalent static wind loads on largespan gable-roofed structures were researched systematically,which can be reference basis for structural wind-resistant design.According to the present results,equivalent static wind loads on large-span gable-roofed structures is the maximum at zero degree wind direction.When the wind direction angle increases,equivalent static wind loads on the structure decreases.As structural height and span increase,equivalent static wind loads on the structure enlarge and its distribution changes.The effect of roof slope on equivalent static wind loads on the structure is complex.Extending the roof slope properly is benefited for structure to resist the wind loads.

关 键 词：等效静风荷载 双坡屋面 风向角 高度 跨度 屋面坡度 

分 类 号：TU312.1[建筑科学—结构工程]