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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...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier Ltd.
2017
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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. |
format | Online Article Text |
id | pubmed-7125878 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Elsevier Ltd. |
record_format | MEDLINE/PubMed |
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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