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(1 重慶大學土木工程學院, 重慶 400044; 2 結構風工程與城市風環(huán)境北京市重點實驗室,北京 100044)
摘要: 鞍型屋蓋應用廣泛,既有客觀風壓分區(qū)方法對鞍型屋蓋的適用性尚未得到驗證,故鞍型屋蓋風壓分區(qū)特征不明. 針對以上問題,對鞍型屋蓋風壓分區(qū)進行了研究. 總結了基于風壓空氣動力特性的方法和基于聚類的數(shù)據(jù)驅動方法的優(yōu)缺點,提出了既有方法無法同時考慮風壓極值大小和位置的問題. 針對鞍型屋蓋風壓分區(qū)構造了一種能同時考慮風壓極值大小和位置的混合風壓分區(qū)方法. 基于我國 A 類地貌條件下的鞍型屋蓋風洞試驗結果,采用不同風壓分區(qū)方法對其進行了風壓分區(qū),討論了不同分區(qū)方法下的分區(qū)特征. 結果表明:混合風壓分區(qū)方法結合了基于空氣動力特性分區(qū)方法確定極值位置和數(shù)據(jù)驅動方法對極值大小分類的優(yōu)點,能夠合理完成鞍型屋蓋風壓分區(qū);基于鞍型屋蓋全風向風壓分布特征,可劃分為角部區(qū)、邊緣區(qū)和中心區(qū)三個分區(qū).
關鍵詞: 鞍型屋蓋; 風壓極值; 風壓分區(qū); 混合風壓分區(qū)法
中圖分類號:TU208 文獻標志碼:A 文章編號: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
∗國家自然科學基金青年基金項目(51808077),重慶市留學人員回國創(chuàng)新支持計劃(cx2019024).
第一作者:韓啟金,碩士,主要從事結構風工程的研究,Email: yntchqj@ foxmail. com.
[引用本文] 韓啟金,劉敏,楊慶山,等. 基于混合風壓分區(qū)方法的鞍型屋蓋風壓分區(qū)研究[J]. 建筑結構,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.
