Wind effect on grooved and scallop domes

Sadeghi, Hossein; Heristchian, Mahmoud; Aziminejad, Armin; Nooshin, Hoshyar

doi:10.1016/j.engstruct.2017.07.003

Cited by 13 publications

(8 citation statements)

References 25 publications

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“…Numerical tests were performed using Ansys Workbench software, fluid flow module (CFX). The geometries were modelled with AutoCAD software and were composed of the structure to be analysed surrounded by the control volume, whose dimensions were adopted according to [2]: length of 4 m, width of 24 m and height of 2,6 m, with the dome centered inside it (Fig. 1).…”

Section: Methodsmentioning

confidence: 99%

“…Few studies approach the numerical simulation of wind in domes. Among the recent ones, Sadeghi, Heristchian, Aziminejad, and Nooshin [2] studied the effect of wind on grooved scallop domes and initially investigated the effect of wind on scallop domes to compare the consequence of grooves against the similar spherical dome. They concluded that the insertion of a slot into a spherical dome caused an abrupt change in its wind pressure coefficient in the vicinity of this slot.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of Wind Pressure Coefficients on Different Scallop Dome Configurations

Guerra

Campos

2022

Design, Construction, Maintenance

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The effects of the action of wind on scallop domes were numerically investigated using the software Ansys, as well the interference of the neighborhood on the external pressure coefficient and the streamlines between geometrically identical domes. The influence of the proportion on the neighborhood interference in scallop domes and the variations in the dimensions of the structures on the pressure coefficients and streamlines were also investigated. Five simulations were analyzed involving six-grooved domes and geometry height variations for validation. The numerically obtained coefficients were compared with values in the literature. Other applications investigated the influence of grooves on the external pressure coefficient and the effect of wind on the grooved domes. Another application analyzed the interference of the neighborhood on the external pressure coefficients and streamlines between three geometrically identical domes and, finally, the influence of the proportion in the study of the interference of the neighborhood. Here, the variations in the dimensions of the structure affected the pressure coefficients and the streamlines were analyzed. It was possible to verify the versatility and efficiency of the computational method used in the analysis of the action of wind.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Wind Pressure Coefficients on Different Scallop Dome Configurations

Guerra

Campos

2022

Design, Construction, Maintenance

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“…Shokrzadeh and Sohrabi 9 obtained wind pressure coefficients on cylindrical tanks and assessed the wind-induced buckling load of these structures. Sadeghi et al 10 obtained wind effect on scallop domes with curve shape code 1 (mentioned above), indicating that it has the maximum effect with the ridge vertical to the wind. Sadeghi et al 11 also studied the flexibility coefficient effect on shape coefficient (C p ) by simulating semi-spherical domes, and compared the results with wind tunnel test results.…”

Section: Introductionmentioning

confidence: 99%

Wind effect on scallop domes with negative amplitude and prominence using Experimental and Numerical Study

Nejati

Sadeghi

Heristchian

2023

International Journal of Space Structures

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This study investigates the wind effect on hexa-sectored scallop domes using Computational Fluid Dynamics (CFD) and wind tunnel tests. Similar to the shape of a seashell, the scallop dome is one of the most common domes used to cover large spans. The scallop dome has an additional curvature equal to its sectors compared to a base dome (spherical). Hence, it has better structural efficiency compared to a spherical dome under the same condition. The curvatures on the scallop dome create alternate “ridges” and “grooves” on it. According to the computations of the article, the grooves created on this dome in the sector, as well as their position angle to the wind direction significantly affect pressure coefficient value. Due to these differences, wind pressure on scallop domes significantly differs from wind pressure on spherical domes. The results indicate that the ridges cause negative wind pressure coefficients whose magnitude reaches a maximum of −2.0 for an angle of alignment of 30°. The analyses have been conducted through Ansys-Fluent. This study presents the equation of wind pressure coefficient in the most critical of dome groove positions. The arch created between the grooves of a scallop dome is another effective parameter on maximum negative pressure. In the case study scallop dome, if the wind effect angle is considered α = 15, the maximum deformation in the structure will be created, which is 20% higher than that of α = 0.

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“…Also, Sadeghi et al [9] simulated hemispherical domes and investigated the influence of the flexibility coefficient on shape factor, comparing the results with those obtained in a wind tunnel. Using numerical modeling based on computational fluid dynamics, Sadeghi et al [10] presented wind pressure coefficients on scalp domes. Uematsu et al [11] examined spherical domes with different deflection-tospan and rise-to-span ratios for two turbulent boundary layers.…”

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confidence: 99%

Effect of Wind Load on Milad Tower and Adjacent Buildings Case study: Shed Adjacent to Tower

Aleslami

Sadeghi

2023

IJEE

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Tall buildings are subject to wind loads as one of the effective lateral loads. An analysis of the effect of wind on Milad Tower is presented in this research. The wind tunnel testing results and numerical modelling implemented in computational fluid dynamics (CFD) using ANSYS software. For the numerical simulation, the K-epsilon model has been used. The study evaluated the flow around the tower in several deformation states and compared it with a model where the tower is modeled rigidly in the wind tunnel. The maximum coefficient of negative pressure (suction) at the top of the tower structure equals to -1.95, which occurs at  =90 o , and the maximum coefficient of the positive pressure equals +1. Since the buildings near the tower are located a short distance from the tower, the shed's structure, which is located near the tower, has also been investigated. With the aid of Tecplot software. The wind pressure coefficients obtained from the wind tunnel test were plotted. As part of the wind loading analysis in the single-span and two-span shed models, the model is rotated with a step of 5 o relative to the direction of wind application, and wind pressure is recorded.

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Wind effect on grooved and scallop domes

Cited by 13 publications

References 25 publications

Numerical Investigation of Wind Pressure Coefficients on Different Scallop Dome Configurations

Numerical Investigation of Wind Pressure Coefficients on Different Scallop Dome Configurations

Wind effect on scallop domes with negative amplitude and prominence using Experimental and Numerical Study

Effect of Wind Load on Milad Tower and Adjacent Buildings Case study: Shed Adjacent to Tower

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