Shape Optimization to Reduce Wind Pressure on the Surfaces of a Rectangular Building with Horizontal Limbs

Paul, Rajdip; Dalui, Sujit Kumar

doi:10.3311/ppci.16888

Cited by 14 publications

(11 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They made experimental measurements and CFD analysis. Paul and Dalui (2021) studied shape optimization of a rectangular plan shaped tall building with horizontal limbs under wind attack, which would minimize the wind pressure on all the faces of the building model simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Wind flow on and around U-shaped buildings

Günaydın

2021

JEDT

View full text Add to dashboard Cite

Purpose This paper presents the numerical examination of wind pressure distributions on U-plan shaped buildings having four different depth ratios (DR) as 0.5, 1, 2 and 4 over wind incidence angle (WIA) of 0°. The purpose of this study is to investigate the effect of irregular building form, DRs, distances from the reentrant corner, wind velocity values on and around wind pressure distributions of the buildings. With this aim, ANSYS Fluent 20.0 Computational Fluid Dynamics (CFD) program is used for the analysis. Design/methodology/approach Four U-shaped buildings having the same height, width and wing length but having different DR in plan were analyzed by the application of CFD package of ANSYS 20. With this purpose, wind pressure distributions on and around U-plan shaped buildings were analyzed for the wind velocity values of 2 and 5 m/s over WIA of 0°. Comprehensive results were obtained from the analyses. Findings While the change in the DR values did not create a significant change in positive pressure coefficients on A and E surfaces, negative pressure values increased as the DR decreased. The negative pressure coefficients observed on the A and E surfaces become higher than the positive pressure coefficients with the decrease in the DR. On contrary to that condition, with the decrease in the DR, G surfaces take higher positive pressure coefficients than the negative pressure coefficients. The reason for this is that the DR decreases and negative pressure values on G surface significantly decrease. The effect of the DR on the pressure coefficients is remarkable on B and D surfaces. The negative pressure coefficients on the B and D surfaces tend to increase as the DR decreases. Research limitations/implications This study focused on DRs and wind velocity values effect on pressure coefficients to limit variables. Different building wing dimensions did not take into account. Originality/value Although there are a number of studies related to wind behavior of irregular plan shaped buildings, irregular building forms have not been extensively investigated parametrically, especially in terms of the effect of DR on wind pressures. This study is therefore designed to fill this gap by analyzing impacts of various parameters like building shape with various DRs, WIA and wind velocity values on wind pressure distributions and velocity distributions on and around the building.

show abstract

Section: Introductionmentioning

confidence: 99%

Wind flow on and around U-shaped buildings

Günaydın

2021

JEDT

View full text Add to dashboard Cite

show abstract

“…Building dimension and ratio of buildings' height to width and thickness also has a significant influence on wind distribution and characteristics, as suggested by Mou et al [9]. Applying horizontal limps in building plans as studied by [10] showed to be effective in minimizing external wind pressure on building faces. Tapering and setback are amongst the popular major aerodynamic modifications in tall buildings to lessen wind responses.…”

Section: Introductionmentioning

confidence: 93%

“…Several numerical and experimental studies have investigated the effect of global (major) and local (minor) modifications on tall building wind responses. Considering major modifications, different building plan configurations showed a strong relation to wind structural responses [6][7][8][9][10]. Hayashida et al [6] studied multiple building plan configuration to examine wind-induced dynamic response of building and found that triangular and 'Y'-shaped building plans counter smaller responses of structural displacement in comparison to rectangular plans.…”

Section: Introductionmentioning

confidence: 99%

Computational Aerodynamic Optimization of Wind-Sensitive Irregular Tall Buildings

et al. 2022

View full text Add to dashboard Cite

Wind-induced loads and motions play a critical role in designing tall buildings and their lateral structural systems. Building configuration represented by its outer shape is a key parameter in determining these loads and structural responses. However, contemporary architecture trends towards creating taller buildings with more complex geometrical shapes to offer unique designs that become a signature on the map of the world. As a result, evaluating wind-induced motions on such structures becomes more challenging to be evaluated and predicted. This paper presents a computational performance-based aerodynamic optimization with minor imposed modifications that have little to no impact on architectural and structural design intent. The developed tool aims to assist both architects and engineers to seek a sustainable optimal design decision at the early stage of design by employing different computational technological tools in an automated manner. A computational optimization methodology consisting of a computational fluid dynamic coupled with finite element analysis and embedded within a radial basis function surrogate model is proposed to mitigate wind-induced loads on tall buildings. In addition, a numerical example implementing the proposed methodology on selected case study is presented and discussed. The proposed approach was able to achieve a minimization of 13.83% and 23.12% for along-wind and across-wind loads, respectively, which is translated to a reduction in structural response by 12.95% and 14.31% in maximum deflection for along-wind and across-wind directions, respectively.

show abstract

“…CFD technique gives the wind effects on various shapes of high-rise buildings in quick time; it works by dividing the building geometry into small elements using meshing, and a number of studies have been carried out on various shapes, for example, Bhattacharyya and Dalui [26] on "E" shape, Raj et al [27] on "H" shape, He and Song [28] on TTU building, Yu and Kareem [29] and Sanyal and Dalui [30] on rectangular shape, Paul and Dalui [31] and Okajima et al [32] on rectangular shape with horizontal limbs, Paul and Dalui [33] on "+" shape, Hajra and Dalui [34] on octagonal shape, Gaur and Raj [35] on square model, Bairagi and Dalui [36] on stepped building model, and Sanyal and Dalui [37][38][39][40] on "Y" shape building model. e major findings obtained through the numerical simulation are as follows: results obtained through the numerical simulation are significantly affected by the mesh size, pressure distributed on the building model depends on the height of the building model, velocity alteration is found on the roof of the building model, and the drag force depends on the exposure to wind.…”

Section: Introductionmentioning

confidence: 99%

Wind Excited Action around Tall Building Having Different Corner Configurations

Meena

Raj

Anbukumar

2022

Advances in Civil Engineering

View full text Add to dashboard Cite

Aeroelastic instabilities are common in square or rectangular plan shape structures due to the development of powerful vortices by the rolling motion of the separated shear layers. Windward corner modifications such as corner cut, recession, rounded, and slotted help to reduce instabilities. Codal recommendations about common shapes like square, rectangle, triangle, and circular shapes are available in different international standards, but they did not provide the detailed analysis results for the different regular shapes with corner configurations. Although analysis was performed on various plan shapes of tall buildings using the computational fluid dynamics technique through k-ε turbulence model, a very small number of studies were performed on particular shapes with different corners having same plan area and height. The mean pressure coefficients of Model-A and Model-B were compared with various international standards and wind tunnel data, respectively, for validation, showing a nearly equivalent consistency; however, international standards consist of coefficients at 0° and 90° wind angles only. Wind effects on building shapes having different corners change the characteristics of the separated shear layer and reduce the downstream wake which helps to reduce drag and lift forces simultaneously. Recent study shows that the windward pressure distribution pattern is almost independent of building size and height. Therefore incorporation of corners in building helps to reduce the forces caused by extreme wind. A very large amount of numerical simulation data about wind pressure is generated, which can be used by the designer while designing such a building for wind load. Comparison have been made between buildings having different corners under same wind speed, and Model-D (round corner) performed very well against the wind.

show abstract

Shape Optimization to Reduce Wind Pressure on the Surfaces of a Rectangular Building with Horizontal Limbs

Cited by 14 publications

References 31 publications

Wind flow on and around U-shaped buildings

Wind flow on and around U-shaped buildings

Computational Aerodynamic Optimization of Wind-Sensitive Irregular Tall Buildings

Wind Excited Action around Tall Building Having Different Corner Configurations

Contact Info

Product

Resources

About