湖南大学学报（自然科学版）2024，Vol.51Issue(5)：123-131,9.DOI:10.16339/j.cnki.hdxbzkb.2024054
低空封闭连廊的表面风压和整体体型系数
Surface Wind Pressure and Overall Shape Coefficients of Low-elevation Enclosed Skybridge
摘要
Abstract
Wind tunnel testing is employed to study the wind pressure distribution and wind load on low-elevation enclosed skybridges.The characteristics of shape coefficients and non-Gaussian distributions on the four surfaces of the skybridges are analyzed.The overall shape coefficients of the skybridges concerning wind azimuths and skybridge length are investigated.Then,the windward overall shape coefficients and skewed wind loading distribution factors of low-elevation enclosed skybridges are provided.The peak wind pressure coefficients under all azimuths based on extreme value analysis are given.Finally,recommended values for the wind-resistant design of skybridges are suggested.Results show that the shape coefficients in the leeward side of a low-elevation enclosed skybridge range from-1.04 to-0.86,which are much larger than-0.6 in magnitude specified for the square tall building in the load code.As a result,the overall shape coefficient of the enclosed skybridge is 1.61,which is larger than the 1.4 specified for the square-high building in the load code.In the windward direction,the overall shape coefficient in the middle section is larger than that in the other section.The overall shape coefficient in the windward direction is larger than that in the other azimuths.The longer the skybridge length,the larger the overall shape coefficient.In the windward direction,the pressures on the windward surface present a Gaussian distribution,whereas those on the other three surfaces present a non-Gaussian distribution.The windward overall shape coefficients and skewed wind loading distribution factor are used as references for the main load-resistant design of the enclosed skybridges.关键词
连廊/风洞试验/体型系数/非高斯分布/极值风压系数Key words
skybridge/wind tunnel test/shape coefficient/non-Gaussian distribution/peak wind pressure coefficient分类
建筑与水利引用本文复制引用
沈国辉,韩康辉,刘若斐,余杭聪,林巍..低空封闭连廊的表面风压和整体体型系数[J].湖南大学学报（自然科学版）,2024,51(5):123-131,9.基金项目
国家自然科学基金资助项目(52178511,51838012),National Natural Science Foundation of China(52178511,51838012) （52178511,51838012）
浙江省公益技术研究计划项目(LGG21E080009),Zhejiang Provincial Basic Public Welfare Research Project(LGG21E080009) （LGG21E080009）
