Wind loads characteristics of irregular shaped high-rise buildings

Li, Yong-gui; Liu, Peng; Li, Yi; Yan, Jiahui; Quan, Jia

doi:10.1177/13694332221120700

Cited by 6 publications

(2 citation statements)

References 32 publications

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“…Concerning shapes with recessed bays, a few studies have investigated wind pressure behavior in H and C-shaped buildings, especially for high-rise buildings. In general, studies show that the recessed cavities of both of these building shapes have a low average influence on wind-induced loads and dynamic responses [6,24] and could even be considered negligible [24]. However, in a detailed analysis, it was found that, at normal wind incidence, the leeward cavities of H-shaped buildings have reduced crosswind excitation compared to rectangular ones [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Wind Pressures on Low-Rise H-Shaped Buildings

Andrioli Medinilha-Carvalho,

Marques da Silva,

Bre

et al. 2024

Buildings

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Recognizing the urgent need for mitigating global warming, natural ventilation presents a potential strategy to reduce cooling energy demands, enhance thermal comfort, and contribute to indoor air quality. H-shaped buildings are prevalent worldwide, and they constitute the majority of the social housing construction in Brazil. Research suggests that the inadequate design of these buildings can result in poor ventilation; however, investigations about their natural ventilation performance are limited. Thus, the present contribution aims to determine the impact of the geometric characteristics of H-shaped buildings on the pressure distribution through wind tunnel experiments. Three models were tested in the wind tunnel experiments, representing different proportions. Their scales were configured to comply with the 5% obstruction limit allowed for wind tunnel testing, which was performed for 20 wind attack angles. Moreover, a scour test was carried out to allow a better understanding of the wind flow. Python scripting was developed to automate data processing, which is openly available in this paper. The results indicate that the proportion of the model influences the pressure distribution on roofs and leeward walls. Additionally, the depth of the recessed cavity affects its side surfaces and can result in a mirrored behavior on the frontal face of deep cavities (i.e., the wind direction is 45°). The model height influences the windward surfaces in its lower portion, since taller models present a recirculation vortex that modifies the pressure near the ground.

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Section: Introductionmentioning

confidence: 99%

Experimental Study of Wind Pressures on Low-Rise H-Shaped Buildings

Andrioli Medinilha-Carvalho,

Marques da Silva,

Bre

et al. 2024

Buildings

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“…Wind load is one of the main loads to be controlled when designing engineering structures; many scholars have studied the characteristics of wind load under different working conditions [4][5][6][7][8][9][10][11][12], including studies on the influence of mountain topography, height and distance on wind load [13][14][15][16][17][18]. The shape factor of wind load is an indispensable parameter when calculating wind load, and it can be obtained by three methods: field tests [19][20][21][22], wind tunnel tests [23][24][25][26] and numerical simulations [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Mountain Height and Distance on Shape Factor of Wind Load of Plastic Tunnel

Xu,

Ren,

et al. 2023

Applied Sciences

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Due to their soft structure and covering material, plastic greenhouses are vulnerable to wind disasters, causing large-scale damage and huge economic losses. The wind load of greenhouses depends on the surface wind pressure distribution, which is different for greenhouses located in valleys from those in plain areas. To study the wind pressure distribution law for various regions of greenhouses built in valleys, mountain and greenhouse models have been built by Computational Fluid Dynamics, in which the length direction of the greenhouse is perpendicular to the valley and the wind direction is parallel to the valley. In the analysis, the verified turbulence model and grid division method are both introduced, and the effect of the height and distance of mountains is considered. According to the distribution law of wind pressure, the greenhouse’s surface is partitioned, and the variation law of the shape factor of wind load on a plastic tunnel is analyzed. Then, the calculation model for the shape factor of the wind load on the greenhouse located in a valley is proposed. The conclusions show that: (a) When the wind inflow direction angle is parallel to the valley, the distribution pattern of wind pressure on the surface of the greenhouse is similar to that on the plain regardless of the distance and height of the mountains, while the values of the wind pressure are greatly affected by the mountain height and distance. The distance between mountains has greater influence than the effect of mountain height. (b) The shape factor of wind load on the suction area of the greenhouse decreases as the distance of mountains increases, while the shape factor on the pressure area of the greenhouse increases with the increase in the distance. It can be seen that the valley effect is non-negligible. The narrower and deeper the valley, the greater the wind pressure effect. (c) When the ratio of the distance between the foot of the mountain and the greenhouse d to the height of the mountain H is less than 5, i.e., d/H < 5, the ratio of the distance to the height has a significant impact on the shape factor of wind load on the greenhouse. When d/H is close to 10, the shape factor of the wind load in the valley area is close to that in the plain area, and the effect of the ratio between the height and the distance is negligible. (d) The proposed calculation model can be used to calculate the effect of mountain height and distance on the shape factor of wind load. The research results can be used in the wind resistance design of plastic greenhouses in valley areas, and can also provide some data support for the revision of the greenhouse structural load code.

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Observations of airflow around a supertall curved building and its impact on temperature and humidity in Houston's urban center

Davis,

Lamer

2024

Building and Environment

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Wind loads characteristics of irregular shaped high-rise buildings

Cited by 6 publications

References 32 publications

Experimental Study of Wind Pressures on Low-Rise H-Shaped Buildings

Experimental Study of Wind Pressures on Low-Rise H-Shaped Buildings

The Influence of Mountain Height and Distance on Shape Factor of Wind Load of Plastic Tunnel

Observations of airflow around a supertall curved building and its impact on temperature and humidity in Houston's urban center

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