Wind Tunnel Test Study of Estimation Method on Peak Wind Pressure of Low-Rise Buildings

2014 ◽  
Vol 488-489 ◽  
pp. 813-816
Author(s):  
Min Duan ◽  
Jia Qi Wang ◽  
Xiu Zhen Wang ◽  
Ping Shi Li
Keyword(s):  
Wind Tunnel ◽  
Average Method ◽  
Estimation Method ◽  
Wind Tunnel Test ◽  
Wind Pressure ◽  
Short Sample ◽  
Test Study ◽  
Extreme Wind ◽  
Ideal Method ◽  
Peak Value

In response to the estimation of the peak values of wind pressure on the maintenance structure, the results with TTU low-rise building standard model of different methods are analyzed and compared. The results show: the results of peak-to-average method and Cook & Mayne method are very close for the long sample estimation of the peak values of wind pressure, the former is the most ideal method for estimation of extreme wind pressure; For short sample estimation, the peak-to-average method fails because the sampling is not long enough, but the Cook & Mayne method can estimate accurate peak value of wind pressure by the short sample (the corresponding prototype time not less than 600s); The peak factor method based on the assumption of normal distribution is not applicable to low-rise building and the results are relatively dangerous.

The Test Study of Shape Coefficient of Low-Rise Buildings Roof with Different Positions of Openings

2012 ◽  
Vol 446-449 ◽  
pp. 3092-3095
Author(s):  
Ji Zhou ◽  
Yuan Ming Dou ◽  
Xi Yuan Liu ◽  
Ji Shu Sun
Keyword(s):  
Wind Tunnel ◽  
Pressure Measurement ◽  
Wind Tunnel Test ◽  
Wind Pressure ◽  
Wind Damage ◽  
Building Roof ◽  
Wind Resistance ◽  
Shape Coefficient ◽  
Test Study ◽  
The One

The majority of low-rise buildings are generally susceptible to wind damage in previous wind disaster, thus it is necessary to gain understanding of the characteristics of wind pressure for these types of building. Based on Wind Tunnel Test, the shape coefficients were studied with pressure measurement on gable roofs laying aside purlin of low-rise building roof in this paper. Three aspects were arerespectively discussed: the lows of shape coefficients and the shape coefficient value with specific wind angle on roofs of the houses completely closed, the house opened doors and windows and the house opened the hole on roof with different wind angle. The laws of shape coefficients were propounded for low-rise buildings with different positions of openings in contrast to load code. A detailed analysis of the experimental results shows that the shape coefficients will increase notably when there are the openings on metope and on roof, and the one is outward of roof, another is inward of roof. It is expected that the results should be valuable for the wind-resistance design of low-rise buildings.

Wind Pressure Coefficients Determination for Pre-Homogenization Storage in Cement Mill

2011 ◽  
Vol 94-96 ◽  
pp. 1026-1030
Author(s):  
Yue Ming Luo ◽  
Yue Yin ◽  
Xi Liang Liu
Keyword(s):  
Wind Tunnel ◽  
Spherical Shell ◽  
Rapid Development ◽  
Wind Tunnel Test ◽  
Wind Pressure ◽  
Wind Engineering ◽  
Pressure Coefficients ◽  
Continuous Innovation ◽  
Structural Style ◽  
Wind Pressures

Due to the increasing of wind disaster, structural wind engineering arouses more and more attention recently, with rapid development on spatial structure and continuous innovation of structural style. The main purpose of structural wind engineering is to calculate the wind pressure coefficients of structure. In this paper, the numerical wind tunnel method (NWTM), based on the Computational Fluid Dynamics (CFD), is applied to study wind load. The wind pressure coefficients of reticulated spherical shell with the 4.6m high wall were first determined, using the NWTM. The results are then compared with the wind tunnel test (WTT) and good agreement is found. The feasibility and reliability of NWTM were then verified. As the second example, NWTM is carried out to predict wind-induced pressure on reticulated spherical shell without wall. Further the distribution behavior of wind pressures on this kind of structures is discussed which could provide professionals the reference for the design of structure.

The Numerical Simulation of the Impact on the Hangzhou Bay Bridge Offshore Platform and the Sightseeing Tower

2012 ◽  
Vol 532-533 ◽  
pp. 352-356
Author(s):  
Hua Bai ◽  
Fang Liang Wang ◽  
Yu Li
Keyword(s):  
Numerical Simulation ◽  
Wind Tunnel ◽  
Surface Pressure ◽  
Wind Tunnel Test ◽  
Offshore Platform ◽  
Wind Pressure ◽  
Windward Side ◽  
Hangzhou Bay ◽  
Leeward Side ◽  
The Impact

In this paper, the distribution of surface wind pressure and wind speed of Hangzhou bay bridge, offshore platform and sightseeing tower is numerically simulated based on Fluent. Two turbulence models, standard k ε model and Realizable k ε model, are used. The influence of the wind pressure distribution of the offshore platform and sightseeing tower by Hangzhou bay bridge is also analyzed. And the detailed comparison between numerical simulation and wind tunnel test is given. Results show that the impact of Hangzhou bay bridge on platform and sightseeing tower occurs mainly with the angle of the wind less than 450. When the angle of the wind is more than 450, the impact is little. The upper of the sightseeing tower does not almost suffer the effect of other buildings. The surface pressure of the platform changes from 5% to 15% between under bridge and under non-bridge condition. The surface pressure of sightseeing tower changes from 0.05% to 3%. The influence on the platform by the bridge is significant but not significant on the sightseeing tower. The simulation results of the tower and mast structure given by both standard k ε model and Realizable k ε model find that the windward side is ideal; the crosswind side is the best; the leeward side is less than ideal. By contrast, the Realizable k ε model is a closer correlation with wind tunnel test than standard k ε model.

Investigation on Wind Tunnel Blockage Effects of High-Rise Building

2013 ◽  
Vol 477-478 ◽  
pp. 793-796
Author(s):  
Huan Tang ◽  
Lei Wang
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Reference Value ◽  
Correction Method ◽  
Wind Pressure ◽  
Building Models ◽  
Significant Difference ◽  
Practical Engineering ◽  
Scaled Models ◽  
Blockage Effect

As the significant difference in wind tunnel data between two scaled models of a practical engineering, the cause of this difference, which was regarded as blockage effect, was analyzed in this paper. Research shows that, for wind tunnel test with more surrounding buildings, blockage effect may result in serious data distortion, especially for lateral wind pressure, and existing correction method does not possess universality. Moreover, blockage ratio, as a global concept, is not appropriate to evaluate blockage effect of wind tunnel pressure data at different parts of building models. This study has reference value for blockage effect of wind tunnel pressure date in practical engineering.

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