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.

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 ON THE EFFECTS OF A HIGH-RISE BUILDING ON THE WIND PRESSURE OF SURROUNDING LOW-RISE HOUSES

1995 ◽  
Vol 60 (478) ◽  
pp. 23-30 ◽  
Author(s):  
Ping HE ◽  
Tadahisa KATAYAMA ◽  
Tetsuo HAYASHI ◽  
Jun-ichiro TSUTSUMI ◽  
Masaru NISHIDA
Keyword(s):  
Wind Tunnel ◽  
Wind Pressure ◽  
Wind Tunnel Tests ◽  
High Rise ◽  
High Rise Building

scholarly journals Study of Wind Loads and Wind Speed Amplifications on High-Rise Building with Opening by Numerical Simulation and Wind Tunnel Test

2020 ◽  
Vol 2020 ◽  
pp. 1-24
Author(s):  
Fu-Bin Chen ◽  
Xiao-Lu Wang ◽  
Yun Zhao ◽  
Yuan-Bo Li ◽  
Qiu-Sheng Li ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Wind Speed ◽  
Wind Tunnel ◽  
Wind Pressure ◽  
Wind Loads ◽  
Structural Safety ◽  
Pressure Coefficients ◽  
High Rise ◽  
High Rise Building ◽  
The Mean

High-rise buildings are very sensitive to wind excitations, and wind-induced responses have always been the key factors for structural design. Facade openings have often been used as aerodynamic measures for wind-resistant design of high-rise buildings to meet the requirement of structural safety and comfort. Obvious wind speed amplifications can also be observed inside the openings. Therefore, implementing wind turbines in the openings is of great importance for the utilization of abundant wind energy resources in high-rise buildings and the development of green buildings. Based on numerical simulation and wind tunnel testing, the wind loads and wind speed amplifications on high-rise buildings with openings are investigated in detail. The three-dimensional numerical simulation for wind effects on high-rise building with openings was firstly carried out on FLUENT 15.0 platform by SST k − ε model. The mean wind pressure coefficients and the wind flow characteristics were obtained. The wind speed amplifications at the opening were analyzed, and the distribution law of wind speed in the openings is presented. Meanwhile, a series of wind tunnel tests were conducted to assess the mean and fluctuating wind pressure coefficients in high-rise building models with various opening rates. The variation of wind pressure distribution at typical measuring layers with wind direction was analyzed. Finally, the wind speed amplifications in the openings were studied and verified by the numerical simulation results.

scholarly journals Experimental Study of Interference Effects of a High-Rise Building on the Snow Load on a Low-Rise Building with a Flat Roof

2021 ◽  
Vol 11 (23) ◽  
pp. 11163
Author(s):  
Qingwen Zhang ◽  
Yu Zhang ◽  
Ziang Yin ◽  
Guolong Zhang ◽  
Huamei Mo ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Snow Accumulation ◽  
Interference Effects ◽  
Wind Tunnel Tests ◽  
Snow Load ◽  
Building Roof ◽  
High Rise ◽  
High Rise Building ◽  
Snow Distribution ◽  
Flat Roof

To explore the interference effects of a high-rise building on the snow load on a low-rise building with a flat roof, a series of wind tunnel tests were carried out with fine silica sand as a substitute for snow particles. The effects of the height of the interfering building and the distance between buildings on the snow distribution of the target building under three different wind directions were studied. The snow depth on the target building roof and the mass of particles blown off from the target building were measured during the wind tunnel tests, and the results showed that the snow distribution of the target building roof tends to be uniform when the interfering building is located upstream of the target building due to the shelter effect. When the interfering building is on the side of the target building, the snow distribution of the target building tends to be more uneven, because the interfering building increases the friction velocity on the target building roof near the interfering building. However, when the interfering building is located downstream of the target building, there will be an amplification effect of snow accumulation, and the snow distribution on the target building roof is nearly the same as that of the isolated condition. Under each wind direction, the interference effect of the snow load increases with the increase of the building height and the decrease of the building spacing. Therefore, the influence of the surrounding buildings on the snow distribution of the building roof cannot be ignored and should be considered in the structure design.

scholarly journals Analysis of Wind Effect on High-Rise Building for Different Terrain Category

2017 ◽  
Vol 2 (12) ◽  
pp. 23
Author(s):  
Chinedum Vincent Okafor ◽  
Kevin Chucks Okolie ◽  
Mbanusi Echefuna Cyril ◽  
Chinenye Pamela Okafor
Keyword(s):  
Wind Speed ◽  
Wind Pressure ◽  
Wind Effect ◽  
Element Analysis ◽  
Nodal Displacement ◽  
Building Model ◽  
High Rise ◽  
High Rise Building ◽  
Profile Equation ◽  
Terrain Category

This paper analyzed the effect of wind loadings on high-rise building for different terrain categories. The wind speed and design wind pressure for the different terrain categories adopted for this study were calculated as per logarithmic wind profile equation and BS6399-2:1997 respectively. Also, the nodal displacement of a 3D high-rise building model with reference to the calculated design wind loads were performed using finite element analysis software(STADDPROV8I). From the result obtained, it was shown that Terrain category IV when compared to other terrain categories recorded lower wind speed and pressure from the ground to a height of about 10m. The writers also observed that at greater terrain category(TC4), the wind speed and pressure tends to be much higher at the top floors(10m-48m) of the high-rise building whereas, terrain categories (TC3, TC2, TC1) recorded lower wind speed and pressure at that same height(10m-48m). this disparity however was discovered to be due to a phenomenon known as gust effect. Also, the nodal displacement for the different terrain category (TC4, TC3, TC2 and TC1) on each floor of the high-rise building increased uniformly in respective pattern as the height of the 3D model increases.  In conclusion, the authors therefore remark “the greater the terrain category, the lowest is the wind speed in the roughness sub layer and the longer height it takes to reach gradient wind speed”.

Large-eddy simulation evaluation of wind loads on a high-rise building based on the multiscale synthetic eddy method

2018 ◽  
Vol 22 (4) ◽  
pp. 997-1006 ◽  
Author(s):  
Yin Luo ◽  
Hongjun Liu ◽  
Huili Xue ◽  
Kun Lin
Keyword(s):  
Large Eddy Simulation ◽  
Wind Pressure ◽  
Turbulent Structures ◽  
Building Model ◽  
High Rise ◽  
High Rise Building ◽  
Eddy Simulation ◽  
Simulation Evaluation ◽  
Large Eddy ◽  
Inflow Turbulence

In this study, the multiscale synthetic eddy method, which can establish coherent turbulent structures and satisfy predefined turbulent statistical and spectral properties, is employed to generate the inflow turbulence for large-eddy simulation of a high-rise building. The recycling method of Lund and synthetic eddy method is also applied to assess the suitability of multiscale synthetic eddy method. The wind pressure at each mesh face centre on the surface of the high-rise building model is exported in the simulation to determine the wind-induced aerodynamic loads. Compared with the synthetic eddy method, the multiscale synthetic eddy method result is in higher agreement with that of the recycling method of Lund in terms of the wind pressure distribution, wind load characteristic and external flow field of the high-rise building.

Effects of Geometrical Factors on Wind Pressure Characteristics of Cylindrical Roofs with Wind Tunnel Tests

2013 ◽  
Vol 351-352 ◽  
pp. 284-289 ◽  
Author(s):  
Bo Chen ◽  
Qing Shan Yang
Keyword(s):  
Wind Tunnel ◽  
Probability Distributions ◽  
Wind Pressure ◽  
Wind Tunnel Tests ◽  
Pressure Coefficients ◽  
High Rise ◽  
Mean Pressure ◽  
The Mean ◽  
Geometrical Factors ◽  
Pressure Characteristics

With wind tunnel tests, simultaneous pressure measurements are made on 4 cylindrical roof models with different rise-span ratios and roof inclinations. Effects of these geometrical factors on wind pressure characteristics of the roofs are investigated, including mean pressure coefficients, RMS pressure coefficients, skewness, kurtosis, and probability distributions of wind pressure. Results show that the mean vertical wind force coefficient of high rise-span ratio roof is larger than that of the low rise-span ration roof; the mean pressure coefficient distribution of the low rise-span ratio roof is similar to that of RMS pressure coefficients and the skewness (or the kurtosis); the vortex center line occurs at the windward edge for the low rise-span ratio roof with inclination 0°, which occurs at the roof apex for the high rise-span ratio roof. The roof inclination has more effects on the low rise-span ratio roof, the vortex moves from the windward edge to the apex for the roof with inclination 7.2°when the wind flows from the low eave to the high eave. The distribution of the skewness is strongly correlative to that of the kurtosis. The probability distributions of the roof edges and corners deviate obviously from the Guass distribution. If this point is ignored, the peak suction pressure will be underestimated.

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