多国规范平屋盖围护结构外表面设计风压对比研究

发布时间：2018-04-26 23:06

本文选题：围护结构 + 平屋盖　；参考：《建筑结构学报》2017年03期

【摘要】：对比分析了中国GB 50009—2012、德国DIN 1055-4、美国ASCE/SEI 7-10、日本AIJ-2004、欧洲BS EN 1991-1-4:2005、加拿大NBC-2005、澳大利亚/新西兰AS/NZS 1170.2:2011、英国BS 6399-2:1997等规范中关于平屋盖围护结构外表面设计风压的有关规定。为便于比较,将各国规范风荷载标准值统一换算为外表面设计风压系数与基本风压乘积的形式。并且将外表面设计风压统一换算为与时距10min、重现期50 a的基本风速相对应的值。针对外表面设计风压相关因素,对风向、风压分区、面积折减、建筑尺寸等进行了对比研究。最后,结合平屋盖风洞试验,探讨了外表面设计风压的具体取值建议。研究表明:平屋盖围护结构外表面设计风压的确定,建议考虑360°全风向;对屋盖边缘应进行风压分区,角部也应进行单独的风压分区;屋盖表面不同位置建议采用不同的面积折减公式;针对不同高度或宽高比建筑给定不同的外表面设计风压建议取值。
[Abstract]:This paper compares and analyzes the relevant regulations on the wind pressure of the outer surface design of flat roof enclosure in China GB 50009-2012, Germany DIN 1055-4, USA ASCE/SEI 7-10, Japan AIJ-2004, European BS en 1991-1-4: 2005, Canada NBC-2005, Australia / New Zealand AS/NZS 1170.2: 2011and British BS 6399-2: 1997. For the sake of comparison, the standard values of wind loads of various countries are converted into the product of the outer surface design wind pressure coefficient and the basic wind pressure. The external surface design wind pressure is converted to the basic wind speed corresponding to the time interval of 10 minutes and the recurrence period of 50 years. The wind direction, wind pressure zoning, area reduction, building size and so on are compared in terms of the factors related to the wind pressure of the outer surface design. Finally, combined with the wind tunnel test of the flat roof, the concrete value of the external surface design wind pressure is discussed. The results show that the wind pressure on the outer surface of the flat roof enclosure is determined by considering the total wind direction of 360 掳, the roof edge should be partitioned by wind pressure, and the corner should be divided into separate wind pressure zones. It is suggested that different area reduction formulas should be used in different position of roof surface and the value of wind pressure should be recommended for the different height or aspect ratio of building to design different external surface pressure.
【作者单位】：北京交通大学土木建筑工程学院;北京交通大学结构风工程与城市风环境北京市重点实验室;
【基金】：国家自然科学基金重大研究计划集成项目(91215302);国家自然科学基金项目(51378061) 高等学校学科创新引智计划项目(B13002) 北京市自然科学基金项目(8152023)
【分类号】：TU312.1

【相似文献】