邻近高耸建筑对小区风环境影响试验研究
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作者单位:

1.长沙理工大学桥梁工程安全控制教育部重点实验室;2.长沙学院土木工程学院

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中图分类号:

TU984.12

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Experimental study on urban wind environment influenced by adjacenthigh-rise building
Author:
Affiliation:

1.School of Civil Engineering,Changsha University of Science Technology,Changsha,China;2.School of Civil Engineering,Changsha University,Changsha,China

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    摘要:

    风环境是评价人居生活质量好坏的重要指标,近年来随着国民经济的快速发展,越来越多的高耸楼宇应运而生,这些楼宇会较大程度改变已有小区风环境,给小区居民正常生活带来困扰,而当前对该问题的针对性研究还十分匮乏。文中以长沙通用时代国际社区为研究背景,利用大尺度风洞(10m×3m×21m)对新增高耸建筑后的小区风环境进行了全方位,多工况试验研究,并基于超越概率法对有无新增高耸建筑小区风环境舒适度与危险度进行了定量评估。研究结论显示:城市小区平均风剖面与湍流度剖面指数值要远高于规范值,表明城市小区具有较大的地表粗糙度。新增高耸建筑会显著改变其邻近区域风环境,如高耸建筑对通用时代小区100 m、200 m和300m范围内平均风速分别造成了25%、6%和2%的加速作用,在增加高耸建筑后小区风环境舒适度与危险度超越概率最大值分别增加了2倍和6倍。

    Abstract:

    Urban wind environment is an important index to evaluate the quality of human life. In recent years, with the rapid development of the economy, more and more new high-rise buildings have been built and greatly changed the existing residential wind environment. It leads a great trouble to the normal life of the residents in the community. However, the target researches focus on this problem is still very scarce. In this paper, the Tongyong Shidai community is chosen as the case study, and the wind environment influenced by high-rise building is analyze by large scale wind tunnel (10m×3m×32m). Meanwhile, exceeding probability method is used to evaluate comfort degree and risk degree of the wind environment in current residential. The results show that the profile index values for average wind profiles and turbulence profiles are much higher than the values of standard, which indicates that urban area has greater surface roughness. The added high-rise buildings will significantly change the wind environment of the adjacent areas. When the tall building is added, the average wind speed in current community within 100m, 200m and 300m from the high-rise building is increased by 25%, 6% and 2%, respectively. The maximum value of the wind environment comfort and risk exceeding probability is increased by two times and six

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  • 收稿日期:2020-05-27
  • 最后修改日期:2020-07-08
  • 录用日期:2020-08-16
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