球冠形屋盖平均体型系数估算研究  

Estimation of Average Shape Factors of Spherical Dome Roofs

作　　者：陈伟伟 刘毅杰 黄苗周 CHEN Weiwei;LIU Yijie;HUANG Miaozhou

机构地区：[1]温州设计集团有限公司,浙江温州325000

出　　处：《浙江建筑》2023年第5期33-36,共4页Zhejiang Construction

摘　　要：球冠形屋盖广泛应用于现今工程中,但其在结构整体计算模型中的风荷载计算往往较复杂繁琐。在此,基于《建筑结构荷载规范(GB 50009—2012)》相关公式,通过数学推导,得出球冠形屋盖的等效集中风荷载及其沿投影面积的平均体型系数,并通过有限元算例核对计算结果的准确性。结果表明:风荷载作用下,球冠形屋盖沿顺风向投影面积的平均体型系数介于0~0.59之间,远小于常规建筑的1.3~1.4;风荷载作用下,球冠形屋盖沿竖直投影面积的风吸力平均体型系数介于-1.0~-0.5之间。Spherical dome roofs find widespread application in contemporary engineering projects,yet the wind load calculations within the overall structural analysis often involve complexities.In this study,based on the relevant formulas from the“Load code for the design of building structures(GB 50009-2012)”and through mathematical derivation,the study has determined the equivalent concentrated wind loads and average shape factors along the projection surface for spherical dome roofs,and verified the accuracy of the calculation results by finite element examples.The results indicate that under wind load,the average shape factor along the windward projection surface of a spherical dome roof falls within the range of 0 to 0.59,significantly lower than 1.3 to 1.4 observed for conventional buildings.Furthermore,under wind load,the wind suction average shape factor along the vertically projected surface of a spherical dome roof ranges from-1.0 to-0.5.

关 键 词：风荷载 风荷载体型系数 球冠形屋盖 半球形屋盖 

分 类 号：TU312.1[建筑科学—结构工程]