Database construction of strong wind-speed increase information in Kyushu area

九州地区强风速增大信息数据库建设

基本信息

批准号：
11555152
负责人：
MAEDA Junji
金额：
$ 7.94万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555152/
关键词：
wind measurement wide area measurement gust factor local wind wind tunnel test 強風分布局地風

项目摘要

A database of strong-wind information was constructed using the records from 122 sites of a wind measurement system operating in the Kyushu area called NeWMeK. Some features of the gust factor distribution concerned with strong winds in the Kyushu area are as follows :1. The gust factors at every site were cataloged as the database of wind speed-increase information from the mean wind velocity in each area using the NeWMeK records from 1995 - 2000. The database was classified into wind records related to typhoons and non-typhoon periods, and grouped into sixteen wind directions. Gust factors in passing typhoons were higher in the southerly wind direction in the southern part of Kyushu, and in the easterly wind direction in mid-Kyushu. Gust factors during non-typhoon periods were higher in the southerly wind direction throughout Kyushu.2. At some sites, gust factors exceeded 2.5. High maximum instantaneous wind speeds were recognized at such sites even when the mean wind speeds were low.3. We could improve the correlation between wind tunnel test results and the measurements at the high gust factor sites by tuning the temperature distributions in the wind tunnel tests.4. However, it was difficult to equate both sets of results in areas where channels and valleys were intricately located.5. Observations of the strong-wind damage rate of housing show a marked increase in the damage caused by wind gusts of over 30 m/s. The relationship between the maximum instantaneous wind speed and the damage rate needs to be investigated further in order to mitigate the effects of strong wind damage.

利用九州地区运行的测风系统 NeWMeK 的 122 个站点的记录构建了强风信息数据库。九州地区大风阵风因子分布的一些特点如下： 1．利用1995-2000年的NeWMeK记录，将各站点的阵风因子编入风速增加信息数据库，该数据库根据各地区的平均风速记录。该数据库分为与台风和非台风时期相关的风记录，并分为十六个风向。过境台风阵风因子在九州南部偏南风向、九州中部偏东风向较高。非台风期间，九州全境偏南风阵风因子较高。2．部分地点阵风超过2.5。即使平均风速较低，这些地点的最大瞬时风速也较高。3．通过调整风洞试验中的温度分布，可以提高风洞试验结果与高阵风场地测量的相关性。 4．然而，在河道和山谷错综复杂的地区，很难将这两组结果等同起来。5．对房屋强风损坏率的观测显示，阵风30m/s以上的房屋损坏明显增加。为了减轻强风损害的影响，需要进一步研究最大瞬时风速与损害率之间的关系。