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Evaluation of pedestrian wind comfort near ‘lift-up’ buildings with different aspect ratios and central core modifications

Owing to the void space at lower heights, lift-up buildings have high building permeability at ground level and subsequently improve the air circulation in congested urban areas. Despite this advantage, the lift-up design has been sparsely adopted for buildings in urban areas partly because of the l...

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Autores principales: Zhang, Xuelin, Tse, K.T., Weerasuriya, A.U., Li, S.W., Kwok, K.C.S., Mak, Cheuk Ming, Niu, Jianlei, Lin, Zhang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier Ltd. 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7125878/
https://www.ncbi.nlm.nih.gov/pubmed/32287974
http://dx.doi.org/10.1016/j.buildenv.2017.08.012
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author Zhang, Xuelin
Tse, K.T.
Weerasuriya, A.U.
Li, S.W.
Kwok, K.C.S.
Mak, Cheuk Ming
Niu, Jianlei
Lin, Zhang
author_facet Zhang, Xuelin
Tse, K.T.
Weerasuriya, A.U.
Li, S.W.
Kwok, K.C.S.
Mak, Cheuk Ming
Niu, Jianlei
Lin, Zhang
author_sort Zhang, Xuelin
collection PubMed
description Owing to the void space at lower heights, lift-up buildings have high building permeability at ground level and subsequently improve the air circulation in congested urban areas. Despite this advantage, the lift-up design has been sparsely adopted for buildings in urban areas partly because of the lack of understanding of the combined effects of building dimensions and lift-up design on the surrounding pedestrian level wind (PLW) field. Therefore, this study aims to investigate the influence of lift-up buildings with different aspect ratios (height/width) on the surrounding PLW field and pedestrian wind comfort level. Five lift-up buildings with aspect ratios 4:1 to 0.5:1 were tested in a boundary layer wind tunnel and results were compared with those of five buildings with similar dimensions but without lift-up design. The results reveal a strong dependence of the maximum wind speed in lift-up areas with building height, which results subsequently a small area of acceptable wind conditions near tall and slender lift-up buildings. Lift-up designs adopted for short and wide buildings produce larger areas of pedestrian wind comfort. The central cores modified with corner modifications are effective in increasing the pedestrian wind comfort in the lift-up area of tall and slender buildings.
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spelling pubmed-71258782020-04-08 Evaluation of pedestrian wind comfort near ‘lift-up’ buildings with different aspect ratios and central core modifications Zhang, Xuelin Tse, K.T. Weerasuriya, A.U. Li, S.W. Kwok, K.C.S. Mak, Cheuk Ming Niu, Jianlei Lin, Zhang Build Environ Article Owing to the void space at lower heights, lift-up buildings have high building permeability at ground level and subsequently improve the air circulation in congested urban areas. Despite this advantage, the lift-up design has been sparsely adopted for buildings in urban areas partly because of the lack of understanding of the combined effects of building dimensions and lift-up design on the surrounding pedestrian level wind (PLW) field. Therefore, this study aims to investigate the influence of lift-up buildings with different aspect ratios (height/width) on the surrounding PLW field and pedestrian wind comfort level. Five lift-up buildings with aspect ratios 4:1 to 0.5:1 were tested in a boundary layer wind tunnel and results were compared with those of five buildings with similar dimensions but without lift-up design. The results reveal a strong dependence of the maximum wind speed in lift-up areas with building height, which results subsequently a small area of acceptable wind conditions near tall and slender lift-up buildings. Lift-up designs adopted for short and wide buildings produce larger areas of pedestrian wind comfort. The central cores modified with corner modifications are effective in increasing the pedestrian wind comfort in the lift-up area of tall and slender buildings. Elsevier Ltd. 2017-11-01 2017-08-08 /pmc/articles/PMC7125878/ /pubmed/32287974 http://dx.doi.org/10.1016/j.buildenv.2017.08.012 Text en © 2017 Elsevier Ltd. All rights reserved. Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.
spellingShingle Article
Zhang, Xuelin
Tse, K.T.
Weerasuriya, A.U.
Li, S.W.
Kwok, K.C.S.
Mak, Cheuk Ming
Niu, Jianlei
Lin, Zhang
Evaluation of pedestrian wind comfort near ‘lift-up’ buildings with different aspect ratios and central core modifications
title Evaluation of pedestrian wind comfort near ‘lift-up’ buildings with different aspect ratios and central core modifications
title_full Evaluation of pedestrian wind comfort near ‘lift-up’ buildings with different aspect ratios and central core modifications
title_fullStr Evaluation of pedestrian wind comfort near ‘lift-up’ buildings with different aspect ratios and central core modifications
title_full_unstemmed Evaluation of pedestrian wind comfort near ‘lift-up’ buildings with different aspect ratios and central core modifications
title_short Evaluation of pedestrian wind comfort near ‘lift-up’ buildings with different aspect ratios and central core modifications
title_sort evaluation of pedestrian wind comfort near ‘lift-up’ buildings with different aspect ratios and central core modifications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7125878/
https://www.ncbi.nlm.nih.gov/pubmed/32287974
http://dx.doi.org/10.1016/j.buildenv.2017.08.012
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