幕墙穿孔金属面板及其背衬板的风荷载调整系数和计算方法研究  

STUDY ON WIND LOAD ADJUSTMENT COEFFICIENT AND CALCULATION METHOD OF PERFORATED METAL PANEL AND ITS BACKING PLATE OF CURTAIN WALL

作　　者：王超 刘军进 乔彬 殷刚 李滇 李建辉 WANG Chao;LIU Jun-jin;QIAO Bin;YIN Gang;LI Dian;LI Jian-hui(National Engineering Research Center of Building Technology,Beijing 100013,China;CABR Technology Co.,Ltd.,Beijing 100013,China)

机构地区：[1]国家建筑工程技术研究中心,北京100013 [2]中建研科技股份有限公司,北京100013

出　　处：《工程力学》2023年第10期141-153,共13页Engineering Mechanics

基　　金：中建研科技股份有限公司青年基金项目(20211902971030042);中国建筑科学研究院有限公司青年科研基金项目(20190122331030005)。

摘　　要：幕墙穿孔金属面板及其背衬板的风荷载取值,以及穿孔板本身变形、应力的计算方法,在现行设计规范中尚无规定。该文完成了三组共计11个工况的风洞试验研究;分析得到了穿孔率、风速、风向角、背衬板间距对穿孔单板、前面板、背衬板所受风荷载大小的影响规律;提出了在现行规范风荷载标准值计算公式基础上乘以多个调整系数的方法,用以计算幕墙穿孔金属板及其背衬板所受的风荷载值,并给出了调整系数的取值或计算公式;完成了144个穿孔金属板的有限元分析,揭示了穿孔率、长宽比、荷载大小对穿孔金属薄板变形值、应力值的影响规律;基于现行规范对非穿孔金属薄板大挠度变形值、应力值的计算方法,提出了用于计算不同穿孔率金属薄板变形值和应力值的调整系数。The wind load values of perforated metal panel and its backing plate of curtain wall,as well as the calculation method of deformation and stress of perforated plate,are not specified in current design codes.Three groups of wind tunnel tests with a total of 11 load cases were performed to obtain the influence law of perforation rate,wind speed,wind direction angle and backing plate spacing on the wind load on perforated veneer,front panel and backing plate.Based on the formula of the standard value of wind load in current code,a method of multiplying multiple adjustment coefficients were proposed to calculate the wind load on the perforated metal plate and its backing plate of the curtain wall,and the values or formulas of the adjustment coefficients were given.The finite element analyses of 144 perforated metal panels were carried out,and the influence law of perforation rate,aspect ratio and load on the deformation and stress of perforated metal plates were revealed.Based on the calculation method of large deflection and stress of non-perforated metal sheet in current code,the adjustment coefficients for calculating the deformation and stress of metal sheet with different perforation rate was proposed.

关 键 词：穿孔金属板 金属薄板设计 风荷载 大挠度 调整系数 

分 类 号：TU312.1[建筑科学—结构工程]