Wind load characteristics of double⁃sided spherical shell roof under downburst

被引：0

作者：

Yao Y. ^{[1
,2
]}

Su L.-F. ^{[1
]}

Li M. ^{[3
]}

Chu Y.-P. ^{[1
]}

Huang H.-J. ^{[3
]}

机构：

[1] School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang

[2] Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Southwest University of Science and Technology, Mianyang

[3] China Aerodynamics Research and Development Cente, Mianyang

来源：

Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2022年 / 52卷 / 03期

关键词：

Different topography; Double-sided spherical shell roof; Downbrust; Structural engineering; Wind pressure characteristic; Wind tunnel test;

D O I：

10.13229/j.cnki.jdxbgxb20200855

中图分类号：

学科分类号：

摘要：

To study the wind pressure distribution characteristics of double-sided spherical shell roofs in flat and sloping terrain under the action of downbursts, a rigid scale model was made based on the similarity criterion. Through wind tunnel tests, the influence of the change of the flow field position of the model in the two terrains on the distribution of the average wind pressure coefficient of the roof and the position and value of the maximum and minimum values are studied. The results show that as the radial distance increases, the average wind pressure coefficient on the windward side of the upper roof changes from positive to negative, and the maximum negative value appears at the edge of the windward surface. The value of the face-on average wind pressure coefficient of the lower roof gradually decreases, but always remains positive. As the radial distance increases, the average wind pressure coefficient of the upper roof is always negative and the negative value gradually increases. The average wind pressure coefficient on the windward side of the lower roof changes from positive to negative, and the maximum negative value appears at the edge of the windward side. The location of the model in the wind field and the different topographic conditions have great influences on wind pressure distribution characteristics which include the positive and negative wind pressure transitions of the upper and lower roofs and the location of the extreme wind pressure and its numerical values. © 2022, Jilin University Press. All right reserved.

引用

页码：615 / 625

页数：10

共 15 条

[1] Holmes J D., Modeling of extreme thunderstorm winds for wind loading of structures and risk sssessment, Proceedings of 10th International Conference on Wind Engineering, pp. 1409-1415, (1999)
[2] Letchford C W, Mans C, Chay M T., Thunderstorms their importance in wind engineering: a case for the next generation wind tunnel, Journal of Wind Engineering and Industrial Aerodynamics, 90, 12-15, pp. 1415-1433, (2002)
[3] Choi E C C, Tanurdjaja A., Extreme wind studiesin Singapore: an area with mixed weather system, Journal of Wind Engineering&Industrial Aerodynamics, 90, 12-15, pp. 1611-1630, (2002)
[4] Chen L, Letchford C W., Multi-scale correlation analysis oftwo lateral profiles of full scale downburst wind speeds, Journal of Wind Engineering and Industrial Aerodynamics, 94, 9, pp. 675-696, (2006)
[5] Hjelmfelt M R., Structure and life circle of microburst out flows observed in Colorado, Journal of Applied Meteorology, 27, 8, pp. 900-927, (1988)
[6] Mason M S, Wood G S, Fletcher D F., Impinging jet simulation of stationary downburst flow over topography, Wind and Structures, 10, 5, pp. 437-462, (2007)
[7] Mason M S, Wood G S, Fletcher D F., Influence of tilt and surface roughness on the outflow wind field of an impinging jet, Wind and Structures, 12, 3, pp. 179-204, (2009)
[8] Mason M S, Wood G S, Fletcher D F., Numerical simulation of downburst winds, Journal of Wind Engineering and Industrial Aerodynamics, 97, 11, pp. 523-539, (2009)
[9] Mason M S., Numerical investigation of the influence of topography on simulated downburst wind fields, Journal of Wind Engineering and Industrial Aerodynamics, 98, 1, pp. 21-33, (2010)
[10] Qu Wei-lian, Liang Zheng-ping, Downburst's characteristics and its effect on wind-induced collapse of transmission tower, Erathquake Engineering and Engineering Dynamics, 30, 6, pp. 120-126, (2010)

← 1 2 →