|Table of Contents|

Study on peak density clustering partition of wind pressure coefficient of shell-shaped roofs(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2024年01期
Page:
158-170
Research Field:
建筑结构
Publishing date:

Info

Title:
Study on peak density clustering partition of wind pressure coefficient of shell-shaped roofs
Author(s):
LIN Yongjun;  ZHOU Chang;  ZHANG Zengpeng;  YU Guofei;  XIE Yuanang
(School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)
Keywords:
peak density;  fast search;  clustering;  partition of wind pressure coefficient;  shell-shaped roof
PACS:
TU311
DOI:
10.19815/j.jace.2022.04051
Abstract:
Because of the particularity of the distribution of wind pressure on the surface of the shell-shaped roof, a partition method of wind pressure coefficient based on the peak density clustering of the fast search technology was proposed. Based on the test results of surface wind pressure distribution on a shell-shaped roof, the wind pressure coefficient partition of peak density clustering was carried out. The SD validity index was used to verify the rationality of the number of divisions, and compared with the improved k-means clustering partition results. The results show that the peak density clustering wind pressure coefficient partition can better reflect the wind pressure distribution characteristics of the roof with the relative distance of wind pressure coefficient, local density and comprehensive index as the characteristic parameters, and effectively ensure the class aggregation and class separation. Compared with the improved k-means partition method, the number of partitions obtained by peak density clustering under different wind angles is close to the SD optimal clustering number. The peak density clustering partition results can more accurately reflecting the characteristics of wind pressure distribution on the surface of shell-shaped roofs, fully reflecting the fundamental principle that the local density and relative distance of wind pressure coefficients at measurement points have larger characteristic values, which has better applicability for wind pressure coefficient partitioning of shell-shaped roofs. The maximum negative wind pressure coefficient of peak density clustering partition of shell-shaped roofs ranges from -0.59 to -1.74.

References:

[1] LI Y Q.Discussion on dynamic coefficients for wind-resistant design in single-layer reticulated shells[J].Advances in Building Technology,2002,2:1123-1130.
[2]罗尧治,蔡朋程,孙 斌,等.国家体育场大跨度屋盖结构风场实测研究[J].振动与冲击,2012,31(3):64-68,78.
LUO Yaozhi,CAI Pengcheng,SUN Bin,et al.Field measurement of wind characteristics on roof of the national stadium[J].Journal of Vibration and Shock,2012,31(3):64-68,78.
[3]LI Y Q,TAMURA Y.Nonlinear dynamic analysis for large-span single-layer reticulated shells subjected to wind loading[J].Wind and Structures,2005,8(1):35-48.
[4]孙 瑛,武 岳,林志兴,等.大跨屋盖结构风压脉动的非高斯特性[J].土木工程学报,2007,40(4):1-5,12.
SUN Ying,WU Yue,LIN Zhixing,et al.Non-gaussian features of fluctuating wind pressures on long span roofs[J].China Civil Engineering Journal,2007,40(4):1-5,12.
[5]林拥军,宋长江,罗 楠,等.大跨度单层网壳结构风洞试验研究[J].工业建筑,2013,43(7):130-134.
LIN Yongjun,SONG Changjiang,LUO Nan,et al.Study on wind tunnel test of large-span single-layer reticulated shell structure[J].Industrial Construction,2013,43(7):130-134.
[6]聂燕松.大跨屋盖结构分区设计风荷载研究[D].哈尔滨:哈尔滨工业大学,2018.
NIE Yansong.Research on partition design wind load of large-span roof[D].Harbin:Harbin Institute of Technology,2018.
[7]JING X K,LI Y Q.Wind tunnel tests for wind pressure distribution on gable roof buildings[J].The Scientific World Journal,2013,2013:396936.
[8]张 建,杨 娜,杨 光,等.大尺度高低跨柱面屋盖的风压系数分区研究[J].建筑结构学报,2018,39(增1):23-28.
ZHANG Jian,YANG Na,YANG Guang,et al.A zoning method of wind pressure coefficients on a large-scale unequal-height cylindrical roof[J].Journal of Building Structures,2018,39(S1):23-28.
[9]杨 光.高低跨柱面屋盖结构的风荷载特性及风压分区研究[D].北京:北京交通大学,2019.
YANG Guang.Study of wind load characteristics and a zoning method of wind pressure on an unequal-height cylindrical roof[D].Beijing:Beijing Jiaotong University,2019.
[10]李丹煜,杨庆山,田玉基.基于K-means聚类的风压系数快速分区方法[J].工程力学,2014,31(12):164-172.
LI Danyu,YANG Qingshan,TIAN Yuji.A quick zoning method for wind pressure coefficients based on K-means clustering[J].Engineering Mechanics,2014,31(12):164-172.
[11]SUN X Y,YU R T,WU Y E.Investigation on wind tunnel experiments of ridge-valley tensile membrane structures[J].Engineering Structures,2019,187:280-298.
[12]楼文娟,李本悦,陆 峰.大跨度屋面风压分布拟合公式及风荷载取值[J].同济大学学报(自然科学版),2002,30(5):588-593.
LOU Wenjuan,LI Benyue,LU Feng.Fitting formula to wind pressure distribution on long-span roofs and wind load suggestion[J].Journal of Tongji University(Natural Science),2002,30(5):588-593.
[13]董 欣,叶继红.锥形涡及其诱导下的马鞍屋盖表面风荷载[J].振动与冲击,2010,29(10):61-70,250.
DONG Xin,YE Jihong.Conical vortex and its induced wind load on a saddle roof[J].Journal of Vibration and Shock,2010,29(10):61-70,250.
[14]董 欣,叶继红.马鞍屋盖表面面积平均风压特性研究[J].振动与冲击,2011,30(7):21-30,62.
DONG Xin,YE Jihong.Area-averaged wind pressure on a saddle roof[J].Journal of Vibration and Shock,2011,30(7):21-30,62.
[15]李丹煜,杨庆山,田玉基.鞍形屋盖风压系数模糊聚类分区研究[J].振动与冲击,2015,34(5):193-198,206.
LI Danyu,YANG Qingshan,TIAN Yuji.Wind pressure zones on a saddle roof based on fuzzy C-means clustering[J].Journal of Vibration and Shock,2015,34(5):193-198,206.
[16]潘钧俊,李方慧,顾 明,等.不同风场开敞和封闭的鞍型屋盖平均风压特性[J].同济大学学报(自然科学版),2009,37(6):715-719.
PAN Junjun,LI Fanghui,GU Ming,et al.Mean wind pressure characteristics on saddle roof with or without enclosed wall under different terrain conditions[J].Journal of Tongji University(Natural Science),2009,37(6):715-719.
[17]顾 明,李方慧,潘钧俊,等.不同风场下开、闭鞍型屋盖脉动风压特性分析[J].同济大学学报(自然科学版),2010,38(7):969-975.
GU Ming,LI Fanghui,PAN Junjun,et al.Fluctuating wind pressure characteristics on saddle roof with and without enclosed wall under different terrain conditions[J].Journal of Tongji University(Natural Science),2010,38(7):969-975.
[18]RODRIGUEZ A,LAIO A.Clustering by fast search and find of density peaks[J].Science,2014,344:1492-1496.
[19]HALKIDI M,VAZIRGIANNIS M,BATISTAKIS Y.Quality scheme assessment in the clustering process[M].Heidelberg:Springer,2000.
[20]林拥军,林池锬,周 祎,等.表面有螺旋装饰条的大跨贝壳形屋盖风荷载特性[J].西南交通大学学报,2021,56(2):261-271.
LIN Yongjun,LIN Chitan,ZHOU Yi,et al.Wind load characteristics of large-span shell-shaped roof with decorative spiral strips[J].Journal of Southwest Jiaotong University,2021,56(2):261-271.
[21]白 桦,回城玉,刘健新.紊流风特性参数对矩形结构表面平均风荷载的影响[J].建筑科学与工程学报,2017,34(6):77-84.
BAI Hua,HUI Chengyu,LIU Jianxin.Effects of turbulence parameters on surface average wind load of rectangular structure[J].Journal of Architecture and Civil Engineering,2017,34(6):77-84.

Memo

Memo:
-
Last Update: 2024-01-25