Evaluation of Wind Induced Interference Effects on Shape Remodeled Tall Buildings

Pal, Supriya; Raj, Ritu

doi:10.1007/s13369-021-05923-x

Cited by 13 publications

(3 citation statements)

References 44 publications

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“…[26] evaluated the interference effect on corner configured structures with variable geometry and blockage configurations under wind loads using CFD and it is observed that shielding effect suppress the interference effects on the principal building. [27] evaluated the wind induced interference effects on square and fish plan shape building model under various interference conditions and the experiment were carried out in boundary layer wind tunnel test at a length scale of 1:300. Zheng et al (2021) [28] analyzed the impact of geometrical characteristics of building balconies on near façade wind flow and presented the pressure distribution on various surface that were investigated using CFD.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Wind Loads on Y Plan-Shaped Tall Building Using CFD

et al. 2022

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The increase in the population is at an exponential rate, and the available land is in the form of irregular shapes. That is why irregular shapes are very commonly built. Wind load increases with respect to height, so wind load evolution is necessary for such high-rise structures. Wind forces majorly depend on the plan's cross-sectional shape. Therefore, for an irregular shape, an investigation is needed for tall buildings. This paper demonstrates a detailed study on velocity stream line, external pressure coefficients, pressure distribution on the surfaces of the building and the turbulence kinetic energy for the Y-shaped plan for tall buildings under wind excitation for wind incidence angles of 0o to 180o. k- turbulence model is utilized to solve the problem using computational fluid dynamics techniques in ANSYS for terrain category II as per IS: 875 (Part3), 2015. Wind ward faces in all building models show positive pressure distribution, while the leeward faces are under the effect of negative pressure distribution. Wind load can be reduced on building models by modifying the corners, such as chamfering, rounding, and double recessed. The variation of pressure distribution on different faces of a "Y" plan shaped tall building for 0° and 180° is investigated using ANSYS CFX, and the pressure contours are plotted for all the faces of different "Y" shaped buildings to compute the effect of corner modification on pressure distribution. In this research, it was found that building models with rounded corners are highly efficient in resisting the wind load. Doi: 10.28991/CEJ-2022-08-02-06 Full Text: PDF

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Section: Introductionmentioning

confidence: 99%

Numerical Study of Wind Loads on Y Plan-Shaped Tall Building Using CFD

et al. 2022

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“…According to the literature, modifying the shape of an entrant's corner by roughly 10% of the building width can reduce wind effects on high-rise buildings. Some researchers also evaluated the effect of interference of principal building models; for example, Pal et al [22] estimated drag and lift force coefficients on interfering square and fish plan shape models; Nagar et al [16] have studied interference effects on "H" and square model; Pal and Raj [23] evaluated the full blockage condition for various plan shapes of tall building models; Pal et al [24] studied interference effect of twin building models on square plan shape and remodelled triangle shape model; Nagar et al [25] studied interference effect on two "+" shape models. Few important outcomes of interfering studies are as follows: pressure distribution is symmetric for isolated building, and drag and lift force coefficient magnitude is based on the position and geometric shape of the neighbouring building model.…”

Section: Introductionmentioning

confidence: 99%

Wind Excited Action around Tall Building Having Different Corner Configurations

Meena

Raj

Anbukumar

2022

Advances in Civil Engineering

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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.

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“…Bairagi & Dalui (2020) [14] studied the pressure distribution of square tall building with 20% setback at h/2 and 10 % setback each at h/3 and 2h/3. Pal and Raj (2021) [15] studied the effect of interference of square plan shape and remodel triangular shape building having same plan area for 100 % blockage condition. It has been revealed that model geometry and orientation of duplicate building models have a significant role on pressure and force generated on the principal building.…”

Section: Introductionmentioning

confidence: 99%

Study of Pressure Distribution on an Irregular Octagonal Plan Oval-Shape Building Using CFD

Kumar

Raj

2021

Civ Eng J

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This paper aims to study the wind flow characteristics and to analyze the wind pressure distribution on the surfaces around an irregular octagonal plan shape building model. There is a central open space in plan to provide more surface area around the building for natural ventilation. Plan area of the building is 300 m2(excluding the open space) and height is 50 m. Steady state flow of wind with 5% turbulence (moderate turbulence) under atmospheric boundary layer has been taken in the study. Numerical simulation with standard k-e model using ANSYS (CFX) software has been used for the purpose. Flow characteristics has been studied in terms of flow separation, reattachment of flow, creation of wakes and vortices. The surface pressure generated around the model has been studied in terms of coefficient of pressure. The model is symmetrical about both the axes in plan. Hence, study for different wind angle of attacks from 0° to 90° @ 30° interval has been conducted. The flow characteristics and unusual or critical coefficient of pressure on surfaces of the model observed have been discussed. Doi: 10.28991/cej-2021-03091760 Full Text: PDF

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Evaluation of Wind Induced Interference Effects on Shape Remodeled Tall Buildings

Cited by 13 publications

References 44 publications

Numerical Study of Wind Loads on Y Plan-Shaped Tall Building Using CFD

Numerical Study of Wind Loads on Y Plan-Shaped Tall Building Using CFD

Wind Excited Action around Tall Building Having Different Corner Configurations

Study of Pressure Distribution on an Irregular Octagonal Plan Oval-Shape Building Using CFD

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