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.

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.

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.

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.

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.

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 Loading and Wind Effects on the Roof of Harbin West Railway Station

2010 ◽  
Vol 163-167 ◽  
pp. 4280-4285
Author(s):  
Di Wu ◽  
Ying Sun ◽  
Yue Wu
Keyword(s):  
Wind Tunnel ◽  
Linear Time ◽  
Time History ◽  
Wind Load ◽  
Wind Pressure ◽  
Wind Loading ◽  
Induced Response ◽  
Railway Station ◽  
History Analysis ◽  
Fluctuating Wind

Taking Harbin west railway station as the researching object, the wind load distribution as well as its effects, which are widely used in practice, is investigated. First, wind pressure distribution on a rigid model is measured simultaneously in a wind tunnel. Some special characteristics of the measured wind pressure, especially its fluctuating component, are discussed. Then the fluctuating wind pressure field is reconstructed based on the synchronous multi-pressure scanning technique of wind tunnel tests and the proper orthogonal decomposition (POD) technique. The influence of lower RC structure on wind-induced vibration is investigated using non-linear time-history analysis. At last, a new method is introduced to obtain equivalent static wind load (ESWL) that reproduce all largest load effects at the same time. With the synthetic application of above methods, the problems such as: complex time and spatial distribution of fluctuating wind; multi-mode vibration of wind-induced response; multiple equivalent objectives for ESWL, can be solved efficiently.

Sign in / Sign up

Export Citation Format

Share Document