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An Experimental Study on Wind Environment caused by Building Group Structure

建筑群结构引起的风环境试验研究

基本信息

批准号：
01550457
负责人：
GOTOH Shigeru
金额：
$ 1.41万
依托单位：
Yokohama National University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550457/
关键词：
Building Group Wind Environment Wind Tunnel Experiment Classification of Regional Type

项目摘要

1. For the grasping approach flow to a urban area, a vertical profile of wind velocity was measured by an observation balloon in the university campus. Although the purpose of this survey was finding the difference of the profile which occurs with the southern approach wind or northern one, sufficient results were not taken because the northern wind condition was poor. The measurement is planned to be continued.2. The experiment in the wind tunnel was conducted using a building group model and it examined following point. That is an influence of the building group density (building coverage and floor area ratio), an arrangement form and a building shape over the urban area air current and a building wind pressure coefficient. The results are shown as follows.(1) An air current below the height of the building eaves was affected by the arrangement form of buildings. Above the height of the building eaves, wind velocity become equal above a certain height, which is 1.5-3 times as high as the height of building eaves. The direction of street influenced the urban area air current up to fairly height.(2) When the building increased in height at the same building coverage, the thickness of surface boundary layer and roughness parameter : Z_0 increased proportionally with the building height in general.(3) When the building bottom length increased in the same building coverage, the growth of street wind was observed in case that the building coverage is low. And a little increase in wind velocity was observed above the height of eaves.(4) The influence of building group density (building coverage) were large and wind pressure on the wall was very different under the height of building eaves.(5) As examining the hight of standard wind velocity in which a wind pressure coefficient coincides on the conditions of the building groups of a various building shape and an arrangement form, its height was equal to or more than 5 times of a building eaves height.

1.对于城市地区的抓取气流，在大学校园内通过观测气球测量了风速的垂直廓线。虽然这次调查的目的是发现出现的南或北方风的轮廓的差异，没有采取足够的结果，因为北方风条件差。计划继续测量。2.在风洞中的实验是使用建筑群模型进行的，它检查了以下几点。这是建筑群密度（建筑覆盖率和容积率）、布置形式和建筑形状对市区气流和建筑风压系数的影响。结果如下所示。(1)建筑物屋檐高度以下的气流受建筑物排列形式的影响。在屋檐高度以上，风速在一定高度以上变得相等，该高度为屋檐高度的1.5-3倍。街道走向对城区气流的影响达到一定程度。(2)当建筑物高度增加时，在相同的建筑覆盖率下，表面边界层厚度和粗糙度参数Z_0一般随建筑物高度的增加而成正比增加。(3)在相同的建筑覆盖率下，随着建筑底部长度的增加，在建筑覆盖率较低的情况下，街风的增长。屋檐高度以上风速略有增加。(4)建筑群密度（建筑覆盖率）的影响较大，屋檐高度不同，墙体上的风压差异较大。(5)当检查标准风速的高度时，其中风压系数在各种建筑形状和布置形式的建筑群的条件下一致，其高度等于或大于建筑屋檐高度的5倍。