scholarly journals Simulation and Analysis of Wind Pressure Coefficient of Landslide-Type Long-Span Roof Structure

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Bin Rong ◽  
Shuhao Yin ◽  
Quankui Wang ◽  
Yanhong Yang ◽  
Jian Qiu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Evaluation Method ◽  
Pressure Coefficient ◽  
Wind Tunnel Test ◽  
Wind Pressure ◽  
Maximum Height ◽  
Distribution Law ◽  
Long Span ◽  
Roof Structure ◽  
Wind Pressure Coefficient

This article carries out a numerical simulation of a landslide-type long-span roof structure, Harbin Wanda Cultural Industry Complex. The maximum span of the landslide-type roof is 150 m and the minimum span is 90 m, with a minimum height of 40 m and a maximum height of 120 m, and the roof area is divided into three different parts. The large eddy simulation (LES) method is used to simulate and record the wind pressure coefficient of the roof. The distribution law and cause of the mean wind pressure coefficient of the roof are firstly analyzed, and the comparison with the existing wind tunnel test data proves the validity of the numerical simulation. Secondly, a qualitative analysis is made on the distribution of root mean square (RMS) fluctuating coefficients. Subsequently, the non-Gaussian characteristics of the roof are briefly discussed, and the peak factor distribution is calculated. Finally, based on the total wind pressure coefficient, a simple evaluation method for judging favorable and unfavorable wind direction angles is proposed, and only the shape of the roof and wind angle need to be known.

scholarly journals Wind Pressure Coefficients Zoning Method Based on an Unsupervised Learning Algorithm

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Danyu Li ◽  
Bin Liu ◽  
Yongfeng Cheng
Keyword(s):  
Wind Tunnel ◽  
Unsupervised Learning ◽  
Wind Direction ◽  
Learning Algorithm ◽  
Pressure Coefficient ◽  
Wind Tunnel Test ◽  
Wind Pressure ◽  
Roof Structure ◽  
Validity Indices ◽  
Wind Pressure Coefficient

Damage of the cladding structures usually occurs from the wind-sensitive part, which can cause the damaged conditions to obviously vary from different areas especially on a large roof surface. It is necessary to design optimization due to the difference of wind loads by defining more accurate wind pressure coefficient (WPC) zones according to the wind vulnerability analysis. The existing wind pressure coefficient zoning methods (WPCZM) have successfully been used to characterize the simple roof shapes. But the solutions for the complex and irregular roof shapes generally rely on the empirical judgment which is defective to the wind loading analysis. In this study, a classification concept for WPC values on the roof surface is presented based on the unsupervised learning algorithm, which is not limited by the roof geometry and can realize the multitype WPC zoning more accurately. As a typical unsupervised learning algorithm, an improved K-means clustering is proposed to develop a new WPCZM to verify the above concept. And a method to determine the optimal K-value is presented by using the K-means clustering test and clustering validity indices to overcome the difficulty of obtaining the cluster number in the traditional methods. As an example, the most unfavorable pressure and suction WPC zones are studied on a flat roof structure with single wind direction and full wind direction based on the data obtained from the wind tunnel test. As another example, the mean pressure coefficient zones are studied on a saddle roof structure under 0- and 45-degree wind direction based on the data obtained by the wind tunnel test. And the proposed WPCZM is illustrated and verified.

Wind tunnel test study on the wind pressure coefficient of claddings of high-rise buildings

2011 ◽  
Vol 5 (4) ◽  
pp. 518-524 ◽  
Author(s):  
Yong Quan ◽  
Yi Liang ◽  
Fei Wang ◽  
Ming Gu
Keyword(s):  
Wind Tunnel ◽  
Pressure Coefficient ◽  
Wind Tunnel Test ◽  
Wind Pressure ◽  
High Rise ◽  
Test Study ◽  
Wind Pressure Coefficient

The Numerical Simulation for Wind Pressure on the Roof of Rhombic Plane and Saddle-Shaped Building

2012 ◽  
Vol 166-169 ◽  
pp. 869-872
Author(s):  
Cai Hua Wang ◽  
Jian Feng Wu
Keyword(s):  
Numerical Simulation ◽  
Low Cost ◽  
Pressure Coefficient ◽  
Wind Pressure ◽  
Average Wind ◽  
Wind Pressure Coefficient ◽  
Load Shape ◽  
Rng Turbulence Model ◽  
Numerical Wind Tunnel Method ◽  
Existing Structure

The existing “structure load code” did not give wind load shape coeeficient of rhombic plane and saddle-shaped roof .On this issue, numerical wind tunnel method has significant advantages such as low cost,fasting,collecting more comprehensive results.Using information of CFD and the software of FLUENT, using RNG - turbulence model, simulating a landform rhombic plane, the paper had numerical simulation of average wind pressure coefficient for rhombic plane and saddle-shaped roof building. It focused the effect on the numerical simulation for bending-span ratio. Finally it provided reference for reasonably determining the average wind pressure coefficient of rhombic plane and saddle-shaped roof building.

Distribution Rule Analysis and Research of Wind Loads of Stadium by Numerical Simulation

2012 ◽  
Vol 256-259 ◽  
pp. 826-830
Author(s):  
Zhi Xiang Yin ◽  
Shuang Zhang
Keyword(s):  
Numerical Simulation ◽  
Wind Tunnel ◽  
Pressure Distribution ◽  
Simulation Analysis ◽  
Surface Wind ◽  
Wind Pressure ◽  
Wind Loads ◽  
Distribution Law ◽  
Long Span ◽  
Distribution Rule

The most of Long-span stadium roofs are complex surface, the load norms cannot put forward the design requirements clearly in frequently. Determine wind loads need to use other means for help, while the numerical wind tunnel is one of the commonly be used to research methods in recent years. This paper introduces about the numerical simulation method of a long-span stadium roof surface wind pressure distribution , and based on FLUENT platform, a gymnasium as an example, the shear stress transport k - ω model (referred to as the SST k - ω model) on the roof surface wind pressure distribution of numerical wind tunnel simulation, analysis stadium roof surface pressure distribution law based on different wind directions.

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.

Different Heights of Upstream Buildings on Wind Pressure Distribution of the Downstream Low Building

2013 ◽  
Vol 353-356 ◽  
pp. 3574-3578
Author(s):  
Cheng Jiang Wang ◽  
Shen Wei Wang ◽  
Qing Xiong Yang
Keyword(s):  
Numerical Simulation ◽  
Pressure Distribution ◽  
Interference Effect ◽  
Pressure Coefficient ◽  
Wind Pressure ◽  
Shielding Effect ◽  
Wind Pressure Coefficient

In this paper, in order to study the wind interference effect,with change of height of the upstream building, the numerical simulation of the downstream construction disturbance of wind pressure distribution has been done. With architecture of upstream, wind pressure coefficient values of windward and leeward faces of downstream building basically reduces,and interference effect shows shielding effect.

Numerical Simulation of Mean Wind Pressure on the Roof of Yantai Gymnasium

2012 ◽  
Vol 226-228 ◽  
pp. 1260-1264
Author(s):  
Xi Meng ◽  
Ri Gao ◽  
Hai Jun Zhang
Keyword(s):  
Numerical Simulation ◽  
Wind Tunnel ◽  
Pressure Distribution ◽  
Negative Pressure ◽  
Small Area ◽  
Wind Tunnel Test ◽  
Wind Pressure ◽  
Windward Side ◽  
Positive Pressure ◽  
Distribution Law

In order to determine the distribution of wind load on the roof, wind tunnel test and numerical simulation are both carried out. Then the distribution of mean wind pressure under different wind directions is obtained and the features of mean wind pressure are also analyzed. The datas show that wind pressure distribution of the roof is predominantly negative pressure; only a small area of windward side is positive pressure distribution. The peak of negative pressure appears at the roof ridge or windward long eaves, and varies as changes of wind direction. Meanwhile, the comparison between the results of the numerical simulation and wind tunnel test shows that the distribution law of both is almost the same, but in some areas that flow separation is serious, the error is larger. Then the reasons for the error are discussed.

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.

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