低矮建筑屋面风荷载分区体型系数研究  

Study on regions shape coefficients of roof wind loads of low-rise buildings

作　　者：陶玲[1,2] 黄鹏[2] 顾明[2] 全涌[2] 

机构地区：[1]上海市青浦区建筑建材业管理所,上海201700 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《建筑结构》2014年第10期79-83,72,共6页Building Structure

基　　金：国家科技支撑计划(2008BAJ08B14);国家自然科学基金(51178352)联合资助

摘　　要：对11种坡度、3种高深比和3种宽深比的总共99个低矮建筑进行了刚性模型测压风洞试验,利用试验结果并借鉴国外荷载规范对屋面进行分区,给出了计算屋面主体结构风荷载各分区体型系数。分析了坡度、高深比和宽深比对分区体型系数的影响,利用最小二乘法对各分区体型系数进行了坡度、高深比和宽深比3参数的拟合,并将拟合公式计算值和多国规范给定值进行了比较,验证了拟合公式的可靠性,同时发现中国荷载规范给出的部分区域的体型系数值偏小。最后根据试验值并参照国外荷载规范给出了中国荷载规范中计算屋面主体结构风荷载分区体型系数的建议值。The rigid model pressure measurement tests were conducted on 99 gabled roof low-rise buildings with 11pitches, 3 height-depth ratios and 3 width-depth ratios. According to the test results and the foreign load codes,the surface of the buildings was divided and the region shape coefficients which were used to calculate wind loads of main-wind-force resisting system were given. The effects of pitches,height-depth ratios and width-depth ratios on region shape coefficients were analyzed,and the region shape coefficients were fitted with pitches,height-depth ratios and width-depth ratios by least square method. The computed values using the fitted formulas were compared with load codes of different countries. The reliability of the fitted formulas was verified and some values in Chinese load code tend to be low. Finally the region shape coefficients values which were used to calculate wind loads of main wind-force resisting system in Chinese load code for the design of building structures were suggested in accordance with the test values and foreign load codes.

关 键 词：屋面分区 体型系数 风洞试验 拟合 荷载规范 

分 类 号：TU312.1[建筑科学—结构工程]