海岛风敏感商业裙楼海浪形钢屋盖风洞试验研究  

Study on Wind Tunnel Test for Wave-shaped Steel Roof of Wind-sensitive Commercial Podium on Islands

作　　者：张艳 林佳铭 伍昭炜 ZHANG Yan;LIN Jiaming;WU Zhaowei(Shanghai Construction No.5(Group)Co.,Ltd.,Shanghai 200063,China)

机构地区：[1]上海建工五建集团有限公司,上海200063

出　　处：《建筑施工》2024年第8期1198-1201,共4页Building Construction

基　　金：上海建工集团股份有限公司重点科研项目课题计划(22JCSF-05)。

摘　　要：对海岛和沿海陆地区域受海陆风影响的风敏感商业裙楼钢屋盖的风洞试验进行相关研究,通过风洞试验确定海浪形钢屋盖复杂围护结构的风荷载,便于海浪形钢屋盖结构的抗风计算,并进行风振结构响应极值估算,用于结构抗风设计。海岛风敏感商业裙楼位于海南岛凤凰海岸核心地段,裙楼屋盖是由多个曲面复合而成的海浪形钢屋盖复杂结构。通过在0°~360°范围内,进行的36个风向测试,得到所有风向下风洞试验结果,统计分析取得:海浪形钢屋盖表面某局部风压峰值可直接用于外围护构件的抗风计算;商业裙楼海浪形钢屋盖风压时程具有明显的非高斯特性,大跨度屋盖悬挑结构处更容易受到负风压的影响,产生向上被掀翻的局部破坏。在风洞试验基础上进行风振结构响应计算分析,为主体结构提供风振结构响应极值。大跨度屋盖悬挑结构处在300°风向角时出现最大等效静风荷载,其值为4.8 kN/m^(2),应在屋盖结构风敏感区域加强抗风设计,保证结构在风荷载作用下的安全可靠度。The wind tunnel test of wind-sensitive commercial podium steel roofs in island and coastal areas,affected by sea-land winds,is conducted to study the behavior of such structures.This testing determines the wind load on the complex envelope structure of wave-shaped steel roofs,facilitating the wind-resistant calculation for these structures.Additionally,it estimates the extreme values of wind-induced structural responses,which are used for the wind-resistant design of the structures.The island wind-sensitive commercial podium is situated in the core area of Fenghuang Coast on Hainan Island.The podium roof is a complex structure composed of multiple curved surfaces forming a wave-shaped steel roof.A total of 36 wind direction tests are conducted in the range of 0°to 360°,and the wind tunnel test results under all wind directions are obtained.Statistical analysis demonstrates that the local peak wind pressure on the surface of the wave-shaped steel roof can be directly utilized for the wind resistance calculation of the peripheral protection components.Additionally,the wind pressure time history of the wave-shaped steel roof of the commercial podium exhibits obvious non-Gaussian characteristics.Consequently,the cantilever structure of the long-span roof is more prone to negative wind pressure,leading to local damage that is overturned upward.Based on wind tunnel testing,the response of wind-induced vibration structures is calculated and analyzed,and the extreme value of these responses is provided for the main structure.Specifically,the maximum equivalent static wind load is observed when the long-span roof cantilever structure is subjected to a wind direction angle of 300°,and its value is recorded as 4.8 kN/m^(2).Therefore,the wind resistance design should be enhanced in the wind-sensitive area of the roof structure to ensure the safety and reliability of the structure under wind loads.

关 键 词：海岛 风敏感商业裙楼 海浪形钢屋盖 风洞试验 风振结构响应分析 

分 类 号：TU317[建筑科学—结构工程]