Simulation Study on the Wind Pressure of Village Flat Roof with Parapet Based on Different Wind Angles

2014 ◽  
Vol 638-640 ◽  
pp. 228-232 ◽  
Author(s):  
Jun Liu ◽  
Yuan Quan Yang ◽  
Yan Lei Sun ◽  
Bin He
Keyword(s):  
Numerical Simulation ◽  
Wind Tunnel ◽  
Pressure Fluctuation ◽  
Field Measurement ◽  
Pressure Coefficient ◽  
Air Pressure ◽  
Wind Pressure ◽  
Simulation Technology ◽  
Wind Tunnel Tests ◽  
Flat Roof

The main research methods to predict and research wind loads on buildings at home and abroad include wind tunnel tests, field measurement and numerical simulation. However, the wind tunnel tests and field measurement require big funds, long cycle and complicated measurement. Moreover, numerical simulation technology is quite mature. In this paper, based on fluid dynamics software CFD and criteria Reynolds k-ε turbulence model, wind field of the village flat roof with parapet is studied using the numerical simulation technology. Furthermore, the wind pressure data in different wind angles are processed and analyzed. The results show that wind angle has a significant impact on the wind pressure and its distribution. When the wind angle is 0 °, the air pressure-fluctuation in each node of the roof is small, and the pressure coefficient is steady between -1.50 and -2.00. When the wind angle is 45 °, the air pressure fluctuation in each node of the roof is large, and the pressure coefficient fluctuates between -0.8 and -3.0. When the wind angle is 90 °, the wind pressure-fluctuation in each node of the roof is equal to the fluctuation between 0 ° and 45 °wind direction angle, and the wind pressure coefficient fluctuates between -0.7 and -1.7. When incoming flow is along the asymmetric axis, the wind pressure-fluctuation is large, and the wind pressure is greater than that in the large negative pressure zone which is along the symmetry axis, which can bring serious damage on the roof.

Numerical Simulation of Surface Wind Pressures on Low-Rise Buildings

2013 ◽  
Vol 353-356 ◽  
pp. 3545-3548
Author(s):  
Peng Zhao ◽  
Heng Dong ◽  
Jian Sui
Keyword(s):  
Numerical Simulation ◽  
Wind Tunnel ◽  
Working Conditions ◽  
Surface Wind ◽  
Wind Pressure ◽  
Shielding Effect ◽  
Area Density ◽  
Wind Tunnel Tests ◽  
Regular Arrangement ◽  
Wind Pressures

This paper mainly studies the distribution characteristics of surface wind pressure on low-rise buildings. Based on the theory of fluid dynamics, this study uses CFD software Fluent 6.3.26 to conduct numerical simulation of the models in wind tunnel tests by Yong Chul Kim involving four working conditions of different spacing or area density in regular arrangement. Compared with data of wind tunnel tests, the results show that different spacing or area density has significant influence on surface wind pressure of low-rise buildings and surrounding buildings have shielding effect over target buildings.

Study of Static Wind-Induced Effects on Residential Complex

2011 ◽  
Vol 137 ◽  
pp. 167-174
Author(s):  
Xing Qian Peng ◽  
Chang Gui Qiao ◽  
Yan Hong Chen
Keyword(s):  
Numerical Simulation ◽  
Wind Tunnel ◽  
Pressure Coefficient ◽  
Wind Tunnel Experiment ◽  
Wind Pressure ◽  
Interference Factor ◽  
Average Wind ◽  
Wind Pressure Coefficient ◽  
Residential District

The wind interference characteristic of six buildings in two rows under different spacing (including Sx、Sy ) was Systematically studied by wind-tunnel experiment and numerical simulation. The average wind pressure coefficient and interference factor of the surfaces of each building in the residential district form was obtained, and the results can be provided as reference to the wind-resistant design of residential district.

Simulation of Wind Pressure for Self-Stayed Rod Based on CFD

2012 ◽  
Vol 204-208 ◽  
pp. 3588-3591 ◽  
Author(s):  
Xiao Song ◽  
Guang Sheng Xu ◽  
Peng Li
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Wind Tunnel ◽  
Turbulent Flow ◽  
Pressure Coefficient ◽  
Influence Factors ◽  
Wind Pressure ◽  
Building Structures ◽  
Wind Tunnel Simulation ◽  
Wind Pressure Coefficient

Method of fluid dynamics numerical simulation and CFD related theory are discussed in the paper. The process of the solution and the influence factors of the numerical simulation are introduced relating with model of self-stayed rod. The wind pressure coefficient can be obtained from numerical wind-tunnel simulation of self-stayed rod in the turbulent flow wind. This research conducts the contrast of Load Code for the Design of Building Structures and results of numerical simulation.

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.

Wind Loading on a Pyramidal Roof Structure

1985 ◽  
Vol 1 (2) ◽  
pp. 105-110 ◽  
Author(s):  
A. J. Dutt
Keyword(s):  
Wind Tunnel ◽  
Peripheral Region ◽  
Wind Pressure ◽  
Scale Model ◽  
Wind Loading ◽  
Wind Tunnel Experiments ◽  
Wind Tunnel Tests ◽  
Roof Structure ◽  
Inner Region ◽  
The Church

This paper deals with the investigation of wind loading on the pyramidal roof structure of the Church of St Michael in Newton, Wirral, Cheshire, England, by wind tunnel tests on a 1/48 scale model. The roof of the model was flat in the peripheral region of the building while in the inner region there was a grouping of four pyramidal roofs. Wind tunnel experiments were carried out; wind pressure distribution and contours of wind pressure on all surfaces of the pyramid roofs were determined for four principal wind directions. The average suctions on the roof were evaluated. The highest point suction encountered was — 4q whilst the maximum average suction on the roof was —0·86q. The results obtained from wind tunnel tests were used for the design of pyramidal roof structures and roof coverings for which localised high suctions were very significant.

Comparisons of design wind pressures on roof-mounted solar arrays between wind tunnel tests and codes and standards

2020 ◽  
pp. 136943322096527
Author(s):  
Jingxue Wang ◽  
Qingshan Yang ◽  
Yi Hui
Keyword(s):  
Wind Tunnel ◽  
Experimental Results ◽  
Solar Panels ◽  
Wind Tunnel Tests ◽  
Pressure Equalization ◽  
Solar Arrays ◽  
Side Ratio ◽  
Design Values ◽  
Wind Pressures ◽  
Flat Roof

The current codes and standards concerning wind loads on roof-mounted solar panels are discussed and summarized. Wind pressures on flat- and slope-roof-mounted solar arrays obtained from wind tunnel tests are compared with the recommended design values in ASCE 7-16 and JIS C 8955: 2017. Different parameters, including building side ratio, aspect ratio and parapet height, are examined. Results show that the largest wind pressures on flat-roof-mounted solar panels of all zones in ASCE 7-16 tend to be 10% to 26% smaller than the experimental results when normalized tributary area An is larger than 103. Uplift wind forces on flat-roof-mounted solar panels in downstream regions obtained from experiments can be larger than the recommended values in JIS C 8955: 2017 for adverse wind, but downward force coefficients are basically smaller than those in JIS C 8955: 2017 for fair wind. 40% to 60% increase on the pressure equalization factor for slope-roof-mounted solar panels is suggested for the potential refinement of ASCE 7-16 based on this study. Meanwhile, proposed pressures of slope-roof-mounted solar panels in JIS C 8955: 2017 might be too conservative according of experimental results.

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.

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