Effect of recessed cavities on wind-induced loading and dynamic responses of a tall building

Wong, S.Y.; Lam, K. M.

doi:10.1016/j.jweia.2012.12.013

Cited by 15 publications

(6 citation statements)

References 7 publications

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“…Kim and Kanda (2013) investigated the spatial-temporal characteristics of pressure fluctuations on tapered and set-back high-rise buildings. Wong and Lam (2013) found the most important effect of H-shaped is the significant reduction of cross-wind excitations and responses of high-rise buildings. Chakraborty et al (2014) investigated the wind pressure distributions on a ‘+’ shaped high-rise building by wind tunnel testing and numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Wind loads characteristics of irregular shaped high-rise buildings

Liu

et al. 2022

Advances in Structural Engineering

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Many irregular shaped high-rise buildings have been built for graceful demand of architecture or better amenity and ventilation in the world. In this study, a benchmark rectangular high-rise building model and six high-rise building models with various irregular shapes, including two T-shaped, two U-shaped, H-shaped and X-shaped, are tested in a boundary wind tunnel to investigate their wind loads characteristics. The coefficients, power spectral density and cross-correlation of base moments as well as local wind forces are analyzed and discussed in details. Based on the wind tunnel test results, it is founded that the effect of U-shape and H-shape on wind loads is negligible. The along-wind mean base moment coefficient of X-shaped model is increased by 10.0% in 90° wind direction. The wind force characteristics of T-shaped models are quite different from the benchmark model in many cases. The mean base moment coefficient of T-shaped 2 model is reduced by 18.6% in 0° wind direction. Larger mean lift forces and torques of T-shaped models are appeared and there is a certain correlation between along-wind and across-wind local wind forces in 90° wind direction.

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Section: Introductionmentioning

confidence: 99%

Wind loads characteristics of irregular shaped high-rise buildings

Liu

et al. 2022

Advances in Structural Engineering

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“…The H-shaped floor plan is a relevant building topology. In addition to being a common design for residential [6,7] and commercial [8] buildings, it is the most common social housing typology for multifamily buildings in Brazil [9], which are typically constructed in suburban areas, where most buildings are low-rise buildings [9]. Moreover, it is noteworthy that Brazil has been heavily investing in social housing, having financed 3,828,054 residential units through the funding program "Minha Casa Minha Vida" between 2009 and 2020 [10].…”

Section: Introductionmentioning

confidence: 99%

“…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%

“…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]. This phenomenon can be related to pumping ventilation [25][26][27] and to building vortex shedding [28].…”

Section: Introductionmentioning

confidence: 99%

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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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“…Therefore, these findings need further investigations for a pair of high-rise buildings with unconventional plans. Large-sized recessed corners are generally provided in the twin residential tall buildings to provide amenities and to allow ventilation to washrooms and kitchens and for maximum views to all apartments [55]. The study of interference effects between closely spaced plus-plan shaped tall buildings with large-sized recessed corners has not yet been conducted.…”

Section: Introductionmentioning

confidence: 99%

Proximity effects between two plus-plan shaped high-rise buildings on mean and RMS pressure coefficients

2021

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Wind-induced interference effects may result in a substantial increase or reduction in the wind forces on the buildings constructed in groups due to modifying wind flow around, according to the shape and relative position of the buildings. Experimental study of wind-generated proximity effects on mean and root mean square (RMS) pressure coefficients between two tall buildings are investigated in detail for various interference conditions in this study. The Interference effects on mean and RMS pressure coefficients are presented as interference factors, i.e., mean interference factor (MIF) and RMS interference factor (RIF). Results show that the interference effects on local wind pressure are significantly higher on the windward side's faces near the recessed corner. The full blockage condition generates suction on walls facing the gap. The half blockage and no blockage conditions create a more severe interference effect than the full blockage. The maximum value of MIF is 4, 9 and 13 in full, half, and no blockage condition, respectively. Interference effects result in reduced wind load on side faces and faces at the leeward side. Suction at side faces reduced approximately by 65% in full blockage condition. RIF's values less than unity are observed for all interference cases.

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Effect of recessed cavities on wind-induced loading and dynamic responses of a tall building

Cited by 15 publications

References 7 publications

Wind loads characteristics of irregular shaped high-rise buildings

Wind loads characteristics of irregular shaped high-rise buildings

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

Proximity effects between two plus-plan shaped high-rise buildings on mean and RMS pressure coefficients

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