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Comparisons of building design wind load.
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This paper investigates the appropriateness of the CFD simulation on the design wind loads of a tall building in the preliminary design stage. An isolated 85-story building was selected for this purpose. CFD study was carried out to evaluate structural design wind loads. During the numerical simulation, the V2F turbulence model and commercial CFD s...
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Citations
... Most of the research studying the pressure coefficients of tallbuildings was either using field results that are very difficult to acquire orrelatively expensive wind tunnel testing or CFD modeling. It has been proven thatalthough field results and experimental results are the most accurate techniques tomodel tall buildings subject to boundary layer winds, CFD modeling could providesufficiently accurate results especially with proper meshing and boundary conditions [12] [13] [14]. However, the slenderness of the buildings studied by thevast majority of researchers was less than the slenderness of a typical ancientEgyptian obelisk which could have a height-to-width ratio ranging from 9 to 12. Thisfact could cause the wind pressure distribution on the surface of an obelisk to besignificantly different than that of a tall building in addition to the fact that itwill make it less stiff. ...
Ancient Egyptian obelisks have been carved thousands of years ago and survived many earthquakes and wind storms. This study examines the aerodynamic characteristics and the response of two of the tallest and slenderest ancient Egyptian obelisks to boundary layer winds using a two-phase methodology. The firstphase involved preparing computational fluid dynamics (CFD) models for the twoobelisks with different angles of projection to wind. The variations in the windpressure coefficient and the forces on the obelisks have been studied for differentprojection angles, different reference velocities and along the height of eachobelisk. Within the second phase structural analysis was performed subjecting eachobelisk to a wind load under different angles of loading. The results show that whensubject to boundary layer winds, the pressure coefficient on the surface and thestresses within the obelisks vary significantly with the angle of attack and dimensions of the obelisk.
... The aerodynamic flow was dependent upon the interval between neighboring buildings, building shape, building density, etc. (Kim et al. 2007). Many researchers (Itoh 1992;Shimada and Hibi 1995;Fu et al. 2006; Kim and Kanda 2010;Tamura et al. 2017;Xu et al. 2017;Kim et al. 2019;Rajasekarababu et al. 2019) have already considered the different types of setback buildings at different levels. ...
The irregular shape of buildings always tenders an enormous challenge to the designers. The wind velocity at the pedestrian level has a specific approach from a comfortable point of view. This investigation highlighted the characteristic of the pedestrian level wind velocity for distinct types of asymmetrical setback buildings. The passed study explored the pedestrian level effect for the axisymmetric models, while this study is based on the models that have symmetry about a single axis. This study investigates the pedestrian level flow fluctuation of setback models with single and double side setbacks at multiple levels. The double-side double setback buildings are efficient to reduce 28%–30% velocity in front of the building and 68%–70% velocity behind the building. Finally it suggests that the double side double setback building is efficient to maintain the velocity at the pedestrian level, roof level, and backside of the building. The setback building can easily control the frequency of fluctuating velocity at downstream flow for both along and across wind conditions.
Description
Eighteen peer-reviewed papers address the complex issues of design, construction, maintenance, evaluation, and repair of building exterior wall systems, both old and new.
Topics cover
System types addressed include facades comprised of vintage masonry, limestone, precast concrete panels, thin stone, exposed cast-in-place concrete, aluminum framing, EIFS, and glass and metal walls.
With advances in wind tunnel methodologies in recent years, the measurement of wind loads on wind tunnel models of buildings and structures can be carried out with a high degree of accuracy. These results lead to more economical and risk-consistent structural designs than do code calculation methods. Five topics related to the prediction of cladding design wind pressures are examined in this paper: (1) wind tunnel testing and analysis methods, (2) integration of wind tunnel data with the full-scale wind climate, (3) evaluation of internal pressures, (4) duration of constant wind pressure for determining the load resistance of glass, and (5) computational fluid dynamics (CFD).
