(1 重庆大学土木工程学院, 重庆 400044; 2 结构风工程与城市风环境北京市重点实验室,北京 100044)

摘要: 鞍型屋盖应用广泛,既有客观风压分区方法对鞍型屋盖的适用性尚未得到验证,故鞍型屋盖风压分区特征不明. 针对以上问题,对鞍型屋盖风压分区进行了研究. 总结了基于风压空气动力特性的方法和基于聚类的数据驱动方法的优缺点,提出了既有方法无法同时考虑风压极值大小和位置的问题. 针对鞍型屋盖风压分区构造了一种能同时考虑风压极值大小和位置的混合风压分区方法. 基于我国 A 类地貌条件下的鞍型屋盖风洞试验结果,采用不同风压分区方法对其进行了风压分区,讨论了不同分区方法下的分区特征. 结果表明:混合风压分区方法结合了基于空气动力特性分区方法确定极值位置和数据驱动方法对极值大小分类的优点,能够合理完成鞍型屋盖风压分区;基于鞍型屋盖全风向风压分布特征,可划分为角部区、边缘区和中心区三个分区.

关键词: 鞍型屋盖; 风压极值; 风压分区; 混合风压分区法

中图分类号:TU208 文献标志码:A 文章编号:1002-848X(2023)12-0103-07

DOI:10. 19701 / j. jzjg. 20201714

Study on wind pressure zoning of saddle roof based on mixed wind pressure zoning method

HAN Qijin1, LIU Min1, YANG Qingshan1,2, YIN Jiaqi1

(1 Department of Civil Engineering, Chongqing University, Chongqing 400044, China; 2 Beijing’ s Key Laboratoryof Structural Wind Engineering and Urban Wind Environment, Beijing 100044, China)

Abstract: Saddle roof is widely used. The applicability of the existing objective wind pressure zoning method to saddleroofs has not been verified. Thus, the characteristics of saddle roof wind pressure zoning are unknown. In response to theabove problem, a research on saddle roof wind pressure zoning has been carried out. The advantages and disadvantages ofthe existing zoning method based on the aerodynamic characteristics of wind pressure and the data-driven method ofclustering was summarized. It was pointed out that the existing methods cannot consider the value and location of windpressure extremes at the same time. A mixed wind pressure zoning method was proposed for saddle roof wind pressure zone,which can consider the extreme value and location of wind pressure at the same time. According to the wind tunnel testresults of the saddle roof under the condition of terrain A in China, different wind pressure partitioning methods were usedto partition the wind pressure, and the partition characteristics under different partitioning methods were discussed. Theresults show that the mixed wind pressure zoning method combines the advantages of determining the extremum locationbased on aerodynamic characteristics and the data driven method to classify the extremum size, and can reasonably completethe wind pressure partition of saddle roof. Based on the wind pressure distribution characteristics of saddle roof, it can bedivided into three areas: corner area, edge area and central area.

Keywords:saddle roof; extreme wind pressure; wind pressure zoning; mixed wind pressure zoning method

∗国家自然科学基金青年基金项目(51808077),重庆市留学人员回国创新支持计划(cx2019024).

第一作者:韩啟金,硕士,主要从事结构风工程的研究,Email: yntchqj@ foxmail. com.

[引用本文] 韩啟金,刘敏,杨庆山,等. 基于混合风压分区方法的鞍型屋盖风压分区研究[J]. 建筑结构,2023,53(12):103-109. HAN Qijin,LIU Min,YANG Qingshan,et al. Study on wind pressure zoning of saddle roof based on mixedwind pressure zoning method[J]. Building Structure,2023,53(12):103-109.