Physical Modeling of Snow Drift and Wind Pressure Distribution at the Proposed German Antarctic Station Neumayer III

2006 ◽  
Author(s):  
Bernd Leitl ◽  
Michael Schatzmann ◽  
Tillmann Baur ◽  
Gert Koenig-Langlo
Keyword(s):  
Wind Tunnel ◽  
Pressure Distribution ◽  
Design Process ◽  
Physical Modeling ◽  
Relevant Information ◽  
Wind Pressure ◽  
Research Station ◽  
Complex Flow ◽  
Flow Measurements ◽  
Snow Drift

Snow drift performance and wind pressure distribution was studied at scaled wind tunnel models of the new Antarctic research station Neumayer III. One objective of the project was to identify possible problems due to wind driven erosion and accumulation of snow around the station body to be constructed on the Antarctic shelf ice. Based on systematic wind tunnel testing including flow visualization experiments, wall shear stress visualization, flow measurements and physical modeling of wind erosion and snow drift, a comprehensive insight into the complex flow phenomena around the station was gained. In a second set of wind tunnel tests, wind pressure distributions were measured for the final station design in order to assist the structural design process. Both, snow drift modeling as well as the wind flow and wind pressure measurements at the station delivered relevant information integrated into the design process and the operational advice of the station.

Wind Pressure Distribution on a Multiple Hyperbolic Paraboloid Shell Roof Building

1987 ◽  
Vol 2 (1) ◽  
pp. 49-54
Author(s):  
A. J. Dutt
Keyword(s):  
Wind Tunnel ◽  
Pressure Distribution ◽  
Model Test ◽  
Wind Pressure ◽  
Wind Tunnel Experiments ◽  
Hyperbolic Paraboloid

Wind pressure distribution was investigated on a multiple hyperbolic paraboloid (HP) shell roof building by model test in the wind tunnel. The roof of the model was a grouping of four similar HP shells in a ‘normal’ array forming a square in plan. Wind tunnel experiments were carried out; wind pressure distribution and the contours of wind pressure on shell roof and walls were determined for various wind directions. The average suctions on roof were computed and compared with those on a single HP shell roof and on a multiple HP shell roof having a ‘sawtooth’ array. The highest point suction encountered was −4·12 q whilst the maximum average suction on the roof was −0·61 q.

WIND PRESSURE DISTRIBUTION ON LOW-RISE BUILDINGS WITH CYLINDRICAL ROOFS

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Astha Verma ◽  
Ashok Kumar Ahuja
Keyword(s):  
Boundary Layer ◽  
Experimental Study ◽  
Wind Tunnel ◽  
Pressure Distribution ◽  
Open Circuit ◽  
Wind Pressure ◽  
Wind Loads ◽  
Wind Loading ◽  
Pressure Coefficients ◽  
Available Information

Wind is one of the important loads to be considered while designing the roofs of low-rise buildings. The structural designers refer to relevant code of practices of various countries dealing with wind loads while designing building roofs. However, available information regarding wind pressure coefficients on cylindrical roofs is limited to single span only. Information about wind pressure coefficients on multi-span cylindrical roofs is not available in standards on wind loads. Present paper describes the details of the experimental study carried out on the models of low-rise buildings with multi-span cylindrical roofs in an open circuit boundary layer wind tunnel. Wind pressure values are measured at many pressure points made on roof surface of the rigid models under varying wind incidence angles. Two cases namely, single-span and two-span are considered. The experimental results are presented in the form of contours of mean wind pressure coefficients. Results presented in the paper are of great use for the structural designers while designing buildings with cylindrical roofs. These values can also be used by the experts responsible for revising wind loading codes from time to time.

Study on Wind Load about Rotary Reticulated Shell by the Wind Tunnel Experiment

2014 ◽  
Vol 578-579 ◽  
pp. 177-179
Author(s):  
Zi Hou Yuan ◽  
Yi Chen Yuan ◽  
Wei Sun
Keyword(s):  
Reynolds Number ◽  
Wind Tunnel ◽  
Pressure Distribution ◽  
Experimental Methods ◽  
Wind Load ◽  
Wind Tunnel Experiment ◽  
Wind Pressure ◽  
Model Experiments ◽  
Rigid Model ◽  
Flow Similarity

This paper is to study the wind load of rotary reticulated shell by experimental methods. The article conduct rigid model experiments to reticulated shell, measure wind pressure distribution on shell’top. Similar conditions is to meet production model:geometric similarity,flow similarity , Reynolds number equal. These results can be used as a reference for the new version of the wind load criteria.

Effect of Added Mass on Wind-Induced Vibration of a Circular Flat Membrane by Wind Tunnel Tests

2018 ◽  
Vol 18 (12) ◽  
pp. 1850156
Author(s):  
Yi Zhou ◽  
Yuanqi Li ◽  
Akihito Yoshida
Keyword(s):  
Wind Tunnel ◽  
Dynamic Analysis ◽  
Pressure Distribution ◽  
Added Mass ◽  
Wind Pressure ◽  
Induced Response ◽  
Wind Tunnel Tests ◽  
Rigid Model ◽  
Flat Membrane ◽  
Wind Induced Vibration

Flexible roof structures, such as membranes, are sensitive to wind action due to their flexibility and light weight. Previously, the effect of added mass on the vibration frequency of membrane structures has been experimentally tested. However, the effect of added mass on wind-induced vibration remains unclear. The purpose of this paper is to investigate the effect of added mass on the wind-induced vibration of a circular flat membrane based on wind tunnel tests. First, wind tunnel tests were conducted to obtain wind pressure distribution from the rigid model and wind-induced vibration from the aeroelastic model of a circular flat membrane. Secondly, a dynamic finite element analysis for the proposed added mass model was conducted to obtain the wind-induced vibration of the membrane structure. Then, with the wind pressure distribution obtained from the rigid model tests, dynamic analysis was conducted either with or without consideration of the effect of added mass. According to the dynamic analysis results and the wind tunnel test results, it is clear that considering the effect of added mass in dynamic analysis can significantly improve the accuracy of a wind-induced response. Such an effect is more significant at the windward than the central zone. The inclusion of added mass can result in a larger displacement response as wind velocity increases but a smaller response as the prestress level increases.

scholarly journals Characteristics of Wind Load on Spatial Structures with Typical Shapes due to Aerodynamic Geometrical Parameters and Terrain Type

2018 ◽  
Vol 2018 ◽  
pp. 1-18 ◽  
Author(s):  
Yi Zhou ◽  
Yuanqi Li ◽  
Yingying Zhang ◽  
Akihito Yoshida
Keyword(s):  
Wind Tunnel ◽  
Pressure Distribution ◽  
Strong Dependence ◽  
Wind Load ◽  
Wind Pressure ◽  
Geometrical Parameters ◽  
Spatial Structures ◽  
Wind Tunnel Tests ◽  
Terrain Type ◽  
Design Optimum

The characteristics of wind load on large-span roofs are complicated by their unique geometrical configurations and strong dependence on aerodynamic geometrical parameters and terrain type. However, there is rarely comprehensive research for characteristics of wind load on spatial structures due to aerodynamic geometrical parameters of roofs and terrain type. In this study, first, the effects of geometrical parameters of roofs and terrain type on the wind pressure distribution based on the data obtained from the existing wind tunnel tests were summarized. Then, the wind loads of full-scale structures were predicted by CFD, and the efficiency of numerical results was further verified by the available wind tunnel tests on spatial structures. Finally, with comparative analyses of the wind pressure distribution of the roofs predicted by CFD under different cases, the effects of shape ratios, especially rise-span ratio, height-span ratio, length-span ratio, and so on, and terrain type on the wind pressure field of typical spatial structures were presented. It can be beneficial to wind-resistant design of structures and can be provided as reference for aerodynamic design optimum of span spatial structures.

WIND PRESSURE DISTRIBUTION ON CIRCULAR CANOPY ROOFS

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Neelam Rani ◽  
Ashok Kumar Ahuja
Keyword(s):  
Boundary Layer ◽  
Wind Tunnel ◽  
Pressure Distribution ◽  
Open Circuit ◽  
Wind Pressure ◽  
Cross Sectional ◽  
Pressure Coefficients ◽  
Wind Pressures

The present study gives information related to wind pressure distribution on single span and multi span circular canopy roofs. The experiments are carried out in an open circuit boundary layer wind tunnel. Wind pressure is measured on both upper and lower roof surfaces of circular canopy roof model made of Perspex sheet. Models are tested under varying wind incidence angles between 0° and 90° at an interval of 15° on isolated model and 0° to 180° at an interval of 30° on models with multi-span canopy roof. Values of mean wind pressure coefficients are evaluated from the measured values of wind pressures. Results of the study are presented in the form of contours, cross sectional variation and face average values of pressure coefficients. The results of the study are of great use for the structural designers for designing circular canopy roofs.

WIND PRESSURE DISTRIBUTION ON NORTH-LIGHT INDUSTRIAL BUILDING ROOF STUDY

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Astha Verma ◽  
Ashok Kumar Ahuja
Keyword(s):  
Boundary Layer ◽  
Experimental Study ◽  
Wind Tunnel ◽  
Pressure Distribution ◽  
Wind Pressure ◽  
Closed Circuit ◽  
Industrial Building ◽  
Building Roof ◽  
Pressure Coefficients ◽  
Wind Pressures

Present paper describes details of the experimental study carried out on the models of industrial building with north-light roof in order to generate the information about wind pressure distribution on it. The models are tested in a closed circuit boundary layer wind tunnel to measure values of wind pressures on roof surface. Four cases namely one, two, three and four spans are considered. The side of Perspex sheet model in case of multi-span study places plywood models. Wind is made to hit the models at 13 wind incidence angles from 0° to 180° at an interval of 15°. Values of mean wind pressure coefficients are evaluated from the measured values of wind pressures and contours are plotted.

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.

Wind Loading on a ‘Sawtooth’ Multiple Hyperbolic Paraboloid Shell Roof

1988 ◽  
Vol 3 (1) ◽  
pp. 43-50
Author(s):  
A.J. Dutt
Keyword(s):  
Wind Tunnel ◽  
Pressure Distribution ◽  
Model Test ◽  
Wind Pressure ◽  
Wind Loading ◽  
Hyperbolic Paraboloid

Investigation of wind loading on a ‘sawtooth’ multiple hyperbolic paraboloid (HP) shell roof was performed by model test in a wind tunnel. Wind pressure distribution on the roof and the walls of the building were determined for various wind directions. Average suctions and highest suctions on ‘sawtooth’ and ‘normal’ roof having the same plan dimensions were compared.

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