Experimental study of wind loads on gable roofs of low-rise buildings with overhangs

Huang, Peng; Tao, Lei; Gu, Ming; Quan, Yong

doi:10.1007/s11709-018-0449-7

Cited by 16 publications

(8 citation statements)

References 19 publications

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“…Natural ventilation is vital for ventilation design and evaluation of built environment (American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc. 2013). As building components, shading devices can disturb airflow in natural ventilation, then change wind-induced characteristics such as convective heat transfer coefficient, wind pressure distribution and pollutant dispersion around building envelopes (Ai, Mak, and Niu 2013;Montazeri and Blocken 2013;Lee et al 2015;Huang et al 2018;Collins, Tasnim, and Wright 2009;Ai and Mak 2014a;Jiang et al 2019). For a building with openings, airflow from outside can increase indoor air velocity and enhance convective heat transfer around buildings (Jiang et al 2019;Mu, Gao, and Zhu 2016).…”

Section: Introductionmentioning

confidence: 99%

Numerical study of wind environment of a low-rise building with shading louvers: sensitive analysis and evaluation of cross ventilation

Zheng

Tao

2020

Journal of Asian Architecture and Building Engineering

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Shading louvers are widely used in buildings to protect the indoor environment from excessive heat gain, especially in hot climatic regions. However, few studies mentioned their influences on wind characteristics. As a type of external components on building facades, shading louvers play an important role in wind-induced physical fields, such as wind pressure distribution and airflow pattern. The purposes of this paper are to analyse the impact of computational parameters on simulation results and evaluate the cross-ventilation capacity of a low-rise building with shading louvers. The rotation angle of shading louvers is considered. The simplified engineering model and the coupled indoor and outdoor airflow model are introduced to perform cross-ventilation evaluation. The sensitive analysis shows that the turbulence model has the greatest impact on numerical results. The evaluation of cross ventilation shows that the simplified model fails to quantify the cross-ventilation capacity for some cases. Based on the coupled airflow model, the largest reduction of ventilation rate is up to 66.6%. This study has performed the first sensitive analysis for airflow fields around the building with shading louvers, which provides a detailed simulation guidelines. The results of cross-ventilation capacity influenced by the shading louvers is helpful for ventilation design.

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Section: Introductionmentioning

confidence: 99%

Numerical study of wind environment of a low-rise building with shading louvers: sensitive analysis and evaluation of cross ventilation

Zheng

Tao

2020

Journal of Asian Architecture and Building Engineering

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“…In areas with heavy rain in summer, some greenhouses have eaves on side walls and gables in order to prevent rainwater from drifting into the greenhouse. Due to the existence of eaves, the wind field around these eaves is rather complicated, which often generates concentrated negative pressures [84] . Therefore, a roof overhang is one of the most easily damaged parts of greenhouses during windstorms [85,86] .…”

Section: Influences Of Overhanging Eaves On Wind Pressurementioning

confidence: 99%

Wind pressure acting on greenhouses: A review

Nan¹,

Wang²,

Bai³

et al. 2021

International Journal of Agricultural and Biological Engineering

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Greenhouses are widely used in agricultural and horticultural production. With the characteristics of lightweight, small stiffness and high flexibility, greenhouses are sensitive to wind loads. In the calculation of wind loads, the wind pressure coefficient (Cp) is essential. The rationality of the value directly affects the safety and economy of greenhouses. Therefore, the Cp values estimation is one of the most important issues in the design of greenhouses. In order to make full use of the existing research results, in this study, three main methods for estimating Cp values were analyzed, namely, full-scale field experiment, wind tunnel experiment and numerical simulation. Five factors influencing the Cp values were then reviewed including greenhouse design parameters, greenhouse group, overhanging eaves, ventilation and wind direction. Based on the existing researches, suggestions for future development and research work were also put forward. Owing to the flexibility and deformability of greenhouses, the fluid-solid coupling method should be used to analyze the effects of vibrations on wind pressures. The interaction of building parameters (such as the number of spans, ridge height, roof shape and slope angle) and terrain around the greenhouse should be taken into consideration comprehensively. The destructive vortices occurred on the greenhouse should be further investigated.

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“…The impact of architectural shading on indoor air quality is based on its change of the thermal and wind environments of buildings. As building components, the presence of shading devices interferes with airflow of natural ventilation, which changes the wind characteristics around the building, such as convective heat transfer coefficient, wind pressure coefficient, and airflow patterns [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Impact of shading louvers on wind-driven single-sided ventilation in a multi-storey building

Zheng

Tao²

2022

E3S Web Conf.

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As a passive building energy-saving technology, shading systems are usually used to reduce the solar radiation into the unit and reduce the energy consumption of air conditioning system. For multi-storey buildings, shading devices can not only change the indoor thermal environment, but also change the indoor wind environment and air quality because their impact on airflow patterns of natural ventilation. In this paper, the numerical simulation method was used to investigate external shading louvers on the single-sided ventilation performance and indoor air quality of units at different positions in a multi-storey building. Three approaching airflow directions and three rotation angles of louvers were considered and analysed. The results show that the evaluation of ventilation performance of shading louvers in multi-storey buildings is important for shaded buildings, which provide a new perspective for the geometry design of shading louvers and ventilation design of buildings.

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Experimental study of wind loads on gable roofs of low-rise buildings with overhangs

Cited by 16 publications

References 19 publications

Numerical study of wind environment of a low-rise building with shading louvers: sensitive analysis and evaluation of cross ventilation

Numerical study of wind environment of a low-rise building with shading louvers: sensitive analysis and evaluation of cross ventilation

Wind pressure acting on greenhouses: A review

Impact of shading louvers on wind-driven single-sided ventilation in a multi-storey building

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