Study on Characteristics of Wind Loading on Open Ended Cantilevered Roof under Typhoon

2012 ◽  
Vol 256-259 ◽  
pp. 788-791
Author(s):  
Zhi Xiang Yin ◽  
Yu Zhang
Keyword(s):  
Pressure Distribution ◽  
Pressure Coefficient ◽  
Surface Wind ◽  
Great Influence ◽  
Wind Load ◽  
Wind Pressure ◽  
Wind Loading ◽  
Load Model ◽  
Large Span ◽  
Wind Pressure Coefficient

Open ended cantilevered roof is different from enclosed roof, because its change of wind pressure distribution is complex, and the wind directions have great influence on it. Up to now, for the characteristics of the structure are very complicated, there is no appropriate wind load model can be used in design, especially under typhoon, a specific wind field. So it is necessary to study the characteristics of wind load on open ended cantilevered roofs of typhoon. Using FLUENT and Computational Fluid Dynamics technology, based on the conventional, Tianpu’s and Shiyuan’s turbulence intensity of the typhoon scenario, a numerical simulation of wind flow around a large-span cantilevered roof was carried out. Analyzed different wind angles of the wind pressure distribution regularities on large-span cantilevered roof. The paper determined the distribution of the surface wind pressure coefficient for the cantilevered roofs, as well as the wind-sensitive parts of structures.

Wind Load Analysis of Large Temporary Stand with Variable Upwind Structure

2014 ◽  
Vol 578-579 ◽  
pp. 606-614 ◽  
Author(s):  
Lin He ◽  
Xiao Xu Zou ◽  
Da Bo Xin
Keyword(s):  
Numerical Method ◽  
Pressure Coefficient ◽  
Surface Wind ◽  
Wind Load ◽  
Wind Pressure ◽  
Wind Loading ◽  
Space Truss ◽  
Load Analysis

Shadowed by temporary exhibition cloth and other non-structural enclosure structures, the wind loading area of temporary stand increase dramatically, thus, temporary stand is easily to be overturned by a wild storm. The surface wind pressure of temporary stand accompanied with cover is presented in this paper by CFD numerical method. The method to identify the wind load on the surface of space truss temporary stand is also proposed with the identified pressure coefficient. The method proposed in this paper is of great use to improve the security of space truss temporary stand.

Numerical Simulation of Pressure Distribution around the Reticulated Shell Structure with Large Span

2013 ◽  
Vol 405-408 ◽  
pp. 710-712
Author(s):  
Zi Hou Yuan ◽  
Yi Chen Yuan ◽  
Wei Sun
Keyword(s):  
Pressure Distribution ◽  
Shell Structure ◽  
Fluid Dynamic ◽  
Flow Analysis ◽  
Wind Load ◽  
Wind Pressure ◽  
Large Span ◽  
Dynamic Software ◽  
Computational Fluid Dynamic Software ◽  
Reticulated Shell Structure

In order to investigate the pressure distribution around the reticulated shell structure with large span, a commercial Computational Fluid Dynamic software Fluent is employed to obtain the wind load and the coefficients of the time averaged pressure distribution around the reticulated shell structure in this paper. The numerical simulations of surface pressure are consistent with the experimental results. The characteristics of the wind pressure distribution are described through the flow analysis around the reticulated shell structure. All these discoveries can be used as a reference for the new version of the wind load criteria.

scholarly journals Influence of the near standing hall for wind flowing around group of circular cylinders

2020 ◽  
Vol 310 ◽  
pp. 00013 ◽  
Author(s):  
Ivana Veghova ◽  
Olga Hubova
Keyword(s):  
Wind Tunnel ◽  
Pressure Distribution ◽  
Pressure Coefficient ◽  
Wind Pressure ◽  
Circular Cylinders ◽  
Wind Flow ◽  
Force Coefficient ◽  
Turbulent Wind ◽  
Wind Speeds ◽  
Wind Pressure Coefficient

This article deals with experimental investigation of air flow around in – line standing circular cylinders and influence of nearby standing hall on external wind pressure distribution. The wind pressure distribution on the structures is an important parameter in terms of wind load calculation. For vertical circular cylinders in a row arrangement only wind force coefficient is possible find in Eurocode. 1991-1-4. External wind pressure coefficient depends on wind direction and the ratio of distance and diameter b. Influence of nearby standing structure is not possible find in Eurocode. The series of parametric wind tunnel studies was carried out in Boundary Layer Wind Tunnel (BLWT) STU to investigate the external wind pressure coefficient in turbulent wind flow. Experimental measurements were performed in BLWT for 2 reference wind speeds, which fulfilled flow similarity of prototype and model. We have compared the results of free in - line standing 3 circular cylinder and influence of hall on distribution of wind pressure at 3 height levels in turbulent wind flow and these results were compared with values in EN 1991-1-4.

scholarly journals Steady Wind Load on External Surface and Its Effect on Wind-Induced Response for a 200 m High Natural-Draught Cooling Tower

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Yunfeng Zou ◽  
Fanrong Xue ◽  
Xuhui He ◽  
Chenzhi Cai ◽  
Shouke Li
Keyword(s):  
Pressure Distribution ◽  
Wind Profile ◽  
Cooling Tower ◽  
Pressure Coefficient ◽  
Wind Load ◽  
External Pressure ◽  
Wind Pressure ◽  
Induced Response ◽  
Simplified Approach ◽  
Static Responses

Wind tunnel tests were carried out to measure the wind pressure of a 200 m high natural-draught cooling tower. An analysis of the distribution characteristics of external pressure was then conducted to determine the pressure coefficients Cp(θ, z) in a given wind profile. Finally, the effect on the response of the shell and the buckling safety of the shell, applying the simplified height-constant pressure coefficient Cp(θ) and the realistic pressure Cp(θ, z), was determined. Taking the wind load specified in the code as an example, the influence of the distribution of external pressure on the wind-induced response was further analyzed. The results indicate that the pressure distribution varies with not only the height z but also the circumferential angle θ, and the wind load of both ends of the tower is significantly greater than that of its middle. Moreover, the wind-induced static responses of the tower under the action of the realistic pressure distribution Cp(θ, z) and the simplified approach Cp(θ) are basically consistent, because the wind load distribution is more important than its magnitude for the wind-induced response of cooling tower, and the wind-induced response of the cooling tower is dominated by the local shell deformation.

A fast partition method for wind pressure coefficient of large-span roof based on modified GK clustering

Structures ◽  
2021 ◽  
Vol 30 ◽  
pp. 518-530
Author(s):  
Fubin Chen ◽  
Zhuoyu Zhan ◽  
Jinfang Zhou ◽  
Zhenru Shu ◽  
Qiusheng Li
Keyword(s):  
Pressure Coefficient ◽  
Wind Pressure ◽  
Large Span ◽  
Wind Pressure Coefficient ◽  
Partition Method

scholarly journals The Wind Loading Characteristics of MAN Type Dry Gas Storage Tank

2020 ◽  
Vol 2020 ◽  
pp. 1-18
Author(s):  
Xinpeng Liu ◽  
Zhitao Yan ◽  
Zhengliang Li ◽  
Junfan Chen ◽  
Jingbo Liu
Keyword(s):  
Surface Roughness ◽  
Pressure Coefficient ◽  
Calculation Model ◽  
Wind Pressure ◽  
Wind Loading ◽  
Minimum Pressure ◽  
Spacing Ratio ◽  
Calculation Results ◽  
Wind Pressure Coefficient ◽  
Wind Pressures

The effects of Reynolds number (Re) and surface roughness on the wind pressure coefficient on a MAN type dry gas tank were analyzed in detail by wind tunnel tests. A wind load calculation model was then established, which is suitable for the wind resistant design of the gas tanks. The test results revealed that in the range of 7 × 105 < Re < 1.0 × 106 (supercritical regimes), the drag coefficient (Cd) and wind pressure coefficient remained constant, consistent with 2D cylinders in a uniform flow. However, in common with 2D cylinder flows, the surface roughness with the spacing ratio (λ) greater than 0.9 had a significant effect on the wind pressures coefficient. The minimum pressure coefficient (Cpmin) sharply increased from −2.3 to −0.65 with increasing surface roughness. The corresponding angle for the minimum pressure coefficient θmin was in between 140°and 90°, which was in a gradual decreasing trend with the increase in surface roughness of the model. The calculation method of the wind pressure coefficient with vary surface roughness was proposed, based on which, the calculation results were in good agreement with the test data.

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 Wind Pressure Distribution on Regular Mega-Frame Surface

2013 ◽  
Vol 639-640 ◽  
pp. 485-488 ◽  
Author(s):  
Yao Xiong
Keyword(s):  
Numerical Simulation ◽  
Pressure Distribution ◽  
Surface Wind ◽  
Wind Load ◽  
Wind Pressure ◽  
Frame Structure ◽  
Story Structure ◽  
High Rise ◽  
Tunnel Model ◽  
Simulation Calculation

One of the critical loads in engineering design is wind load, especially for high-rise structure or multi-story structure. In order to forecast the distribution of wind effects on structure, how to accurately predict the building surface wind pressure distribution is very important. Using the wind tunnel model test and numerical simulation calculation methods, the surface wind load on the mega-frame structure were comparatively analyzed and researched in this paper. The results show that combined the realized к-ε model with the standard wall function will not only satisfy the mega-frame structure surface wind pressure value requirement, but also provide complete wind filed around, which could provide meaningful information for further research on wind load.

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