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

机译：评估不同纵横比和中央核心修改后的提升建筑物附近的行人风舒适度

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摘要

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. (C) 2017 Elsevier Ltd. All rights reserved.
机译：由于处于较低高度的空旷空间，可抬起的建筑物在地面上具有较高的建筑物渗透性，从而改善了拥挤市区的空气流通。尽管具有这一优势，但由于缺乏对建筑物尺寸和抬升设计对周围行人风（PLW）领域的综合影响的了解，因此在城市地区的建筑物中很少采用抬升设计。因此，本研究旨在调查不同纵横比（高/宽）的抬升建筑物对周围PLW场和行人风舒适度的影响。在边界层风洞中测试了5座纵横比为4：1至0.5：1的高耸建筑物，并将结果与​​五座类似尺寸但没有高耸设计的建筑物进行了比较。结果表明，在建筑物高度的提升区域中，最大风速有很强的依赖性，因此，在高而细长的提升建筑物附近会产生一小部分可接受的风况。短而宽的建筑物采用的举升设计产生了较大面积的行人风舒适度。带有角部更改的中央核心在增加高层和细长建筑物的抬起区域中的行人风舒适度方面有效。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Building and Environment》 |2017年第11期|245-257|共13页
  • 作者

    Zhang Xuelin; Tse K. T.; Weerasuriya A. U.; Li S. W.; Kwok K. C. S.; Mak Cheuk Ming; Niu Jianlei; Lin Zhang;

  • 作者单位

    Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China;

    Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China;

    Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China;

    Tsinghua Univ, Div Ocean Sci & Technol, Grad Sch Shenzhen, Shenzhen, Peoples R China;

    Western Sydney Univ, Ctr Infrastruct Engn, Penrith, NSW, Australia;

    Hong Kong Polytech Univ, Dept Bldg Serv Engn, Kowloon, Hong Kong, Peoples R China;

    Hong Kong Polytech Univ, Dept Bldg Serv Engn, Kowloon, Hong Kong, Peoples R China|Univ Sydney, Fac Architecture Design & Planning, Sydney, NSW, Australia;

    City Univ Hong Kong, Div Bldg Sci & Technol, Kowloon, Hong Kong, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lift-up building; Building dimension; Corner modification; Pedestrian wind comfort; Wind tunnel test;

    机译：高层建筑;建筑物尺寸;转角改造;行人舒适度;风洞试验;

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