scholarly journals Wind action on flat roofs

2014 ◽  
Vol 13 (2) ◽  
pp. 239-246
Author(s):  
Tomasz Lipecki
Keyword(s):  
Wind Tunnel ◽  
Cross Section ◽  
Pressure Coefficient ◽  
Wind Engineering ◽  
Wind Action ◽  
High Rise ◽  
Wind Structure ◽  
University Of Technology ◽  
Mean Pressure ◽  
Flat Roofs

The paper deals with the wind action on flat roofs of rectangular shapes which can be considered for medium-rise and high-rise buildings. Distributions of mean pressure coefficient Cp on flat roofs were measured. All analyses were based on model measurements which had been performed in the boundary layer wind tunnel in Wind Engineering Laboratory of Cracow University of Technology. Vertical, fixed in the floor of the wind tunnel on the turn table rectangular prisms of the ratio of cross-section dimensions 1:2 and 1:4 were investigated. Measurements were carried out for the angle of wind attack in the range 0°-90°, every 15°. The influence of the wind structure on pressures was investigated in six different cases of the approaching wind.

scholarly journals Wind effects on tall buildings according to own measurements and code approach

2013 ◽  
Vol 12 (2) ◽  
pp. 143-150 ◽  
Author(s):  
Tomasz Lipecki
Keyword(s):  
Wind Tunnel ◽  
Cross Section ◽  
Tall Buildings ◽  
Wind Pressure ◽  
Wind Engineering ◽  
Bending Moments ◽  
Wind Effects ◽  
Wind Action ◽  
University Of Technology ◽  
The Cross

The paper presents the analysis of the wind action on tall buildings carried out in accordance with the recommendations of Eurocode 1, and with the results of own research conducted in the wind tunnel of the Wind Engineering Laboratory, Cracow University of Technology. Ten buildings of the same proportions were analyzed, five structures with the ratio of the cross-section dimensions of 1:2 and five of 1:4. The wind action on the longer side (N1) and on the shorter side (N2) were adopted in all cases of buildings. The total forces of wind pressure as well as displacements of top and bending moments at the base of the buildings were taken as the results which allowed to compare two different approaches.

scholarly journals Wind tunnel tests of wind action on a high-rise building

2014 ◽  
Vol 13 (2) ◽  
pp. 163-171
Author(s):  
Grzegorz Bosak
Keyword(s):  
Wind Tunnel ◽  
Building Design ◽  
Wind Pressure ◽  
Horizontal Wind ◽  
Wind Tunnel Tests ◽  
Wind Action ◽  
High Rise ◽  
High Rise Building ◽  
University Of Technology ◽  
Wind Pressures

The paper summarizes the results of wind tunnel tests of a wind action on a high-rise building design in Warsaw. Measurements were accomplished in Wind Engineering Laboratory of Cracow University of Technology. Wind pressures on external surfaces of the building model were acquired. A study of the character of the wind action on a tower of the building was the main aim of the paper. A triangle shape with rounded corners of the cross section of the tower and a complex group of neighbor buildings support aerodynamic analysis in a wind tunnel. Wind pressure coefficients on the external building surfaces and the global horizontal wind action on the building tower on full scale were analyzed.  

scholarly journals Wind tunnel tests of aerodynamic interference of the high-rise building and its nearest city surroundings

2013 ◽  
Vol 12 (2) ◽  
pp. 079-086
Author(s):  
Grzegorz Bosak
Keyword(s):  
Wind Tunnel ◽  
Building Design ◽  
Wind Pressure ◽  
Horizontal Wind ◽  
Wind Tunnel Tests ◽  
Wind Action ◽  
Building Model ◽  
High Rise ◽  
High Rise Building ◽  
Aerodynamic Interference

The paper summarizes the results of wind tunnel tests of the influence of aerodynamic interference on wind action of a high-rise building design in Warsaw. Measurements were accomplished in Wind Engineering Laboratory of Cracow University of Technology. Wind pressures on external surfaces of the building model were acquired in two different situations. Firstly, only the building model was placed in the tunnel working section, secondly, the building model with the nearest surroundings was taken under consideration. A study of the character of wind action differences caused by the nearest surroundings of the building was the main aim of the paper. Wind pressure coefficients on the external building surfaces and the difference of horizontal wind action on full scale were compared.

Numerical Simulation of Flow around High-Rise Buildings Based on Reynolds Stress Model

2014 ◽  
Vol 580-583 ◽  
pp. 3057-3061
Author(s):  
Zu Peng Zhang ◽  
Wei Zhang ◽  
Guo Ping Chen
Keyword(s):  
Wind Tunnel ◽  
Reynolds Stress ◽  
Reynolds Stress Model ◽  
Wind Engineering ◽  
Stress Model ◽  
High Rise ◽  
Tunnel Model ◽  
Inflow Turbulence ◽  
Model Equations ◽  
Good Agreement

In this paper, a modified inlet atmosphere boundary layer (ABL) which satisfies the turbulence model equations is applied to computational wind engineering. The new inflow turbulence boundary condition applied to simulating the flow in the cavity is verified that it is more in line with the actual flows, and then it is used to establish the numerical wind tunnel model to simulate the flow around high-rise buildings. The results are in good agreement with the wind tunnel experimental data, which show the modified ABL combined with Reynolds Stress Model (RSM) is able to better simulate the flow around high-rise buildings.

scholarly journals Wind structure influence on pressure coefficient distribution on the surface of circular cylinder of the diameter 20 cm

2012 ◽  
Vol 10 (1) ◽  
pp. 081-092
Author(s):  
Tomasz Lipecki ◽  
Jarosław Bęc ◽  
Ewa Błazik-Borowa
Keyword(s):  
Circular Cylinder ◽  
Vertical Profile ◽  
Pressure Coefficient ◽  
Coefficient Distribution ◽  
Wind Structure ◽  
Power Spectral ◽  
Mean Pressure ◽  
Mean Wind Speed ◽  
Spectral Density Functions ◽  
D 20

The paper deals with results and analyses of the model investigations which were performed in wind tunnel and were focused on the flow around single circular cylinder. Presented results are related to variations in the distribution of the normalized mean pressure coefficient on the surface of the model as well as its standard deviation. Sic cases of the approaching flow were taken into consideration. The flow was described by vertical profile of the mean wind speed, vertical profile of the intensity of turbulence, and power spectral density functions. The height and dimension of the model were respectively equal: H = 100 cm, D = 20 cm. Selected results of measurements have been shown in the paper as the effect of these experiments.

scholarly journals Wind structure influence on surface pressures of rectangular cylinders of cross-section dimensions 10 cm x 20 cm

2012 ◽  
Vol 10 (1) ◽  
pp. 069-080
Author(s):  
Tomasz Lipecki ◽  
Ewa Błazik-Borowa ◽  
Jarosław Bęc
Keyword(s):  
Cross Section ◽  
Pressure Coefficient ◽  
Wind Pressure ◽  
Wind Speed Profile ◽  
Wind Structure ◽  
Power Spectral ◽  
Mean Wind Speed ◽  
Spectral Density Functions ◽  
Wind Pressure Coefficient ◽  
Rectangular Cylinders

The paper deals with results of measurements which have been carried out in the wind tunnel. Vertical, fixed prism of the cross-section dimensions 10 cm x 20 cm was the object of the experiment. Distributions of mean wind pressure coefficient on the surface of the prism were accepted as results presentation. The following parameters of the wind structure were analysed: vertical mean wind speed profile, turbulence intensity profile, power spectral density functions with respect to their influence on pressure coefficient values. Changes of the angle of wind attack were taken into consideration.

scholarly journals Determination of Pressure Coefficient for a High-Rise Building with Atypical Ground Plan

2018 ◽  
Vol 14 (2) ◽  
pp. 138-145 ◽  
Author(s):  
Soňa Medvecká ◽  
Ol’ga Ivánková ◽  
Marek Macák ◽  
Vladimíra Michalcová
Keyword(s):  
Fluid Dynamics ◽  
Pressure Coefficient ◽  
Wind Pressure ◽  
Dynamics Simulation ◽  
Experimental Measurements ◽  
Computational Fluid Dynamics Simulation ◽  
High Rise ◽  
Ground Plan ◽  
University Of Technology

Abstract In this article, the results of pressure coefficient on the atypical object obtained by experimental measurements in a boundary layer wind tunnel (BLWT) of Slovak University of Technology in Bratislava (STU) and computational fluid dynamics simulation (CFD) are presented. The pressure coefficient is one of the most important parameters expressing the wind pressure distribution on the structure. The loading by wind can only be acquired by execution of detailed tests and numerical analyses [1].

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