| Project/Area Number |
01550448
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Building structures/materials
|
|---|
| Research Institution | Chiba Institute of Technology |
|---|
Principal Investigator |
HAGURA Hiroto Chiba Institute of Technology, Technology, Professor, 工学部, 教授 (70083889)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KOIZUMI Toshio Chiba Institute of Technology, Technology, Associate Professor, 工学部, 助教授 (10083883)
|
|---|
| Project Period (FY) |
1989 – 1990
|
| Project Status |
Completed (Fiscal Year 1990)
|
| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1990: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1989: ¥1,400,000 (Direct Cost: ¥1,400,000)
|
|---|
| Keywords | local topography / wind disaster / characteristic of wind / relationships between wind and topography / trajectory of wind / 建物を越える風 / 風の特別 / 局所地形と風 / 風の観測システム / 建物周辺気流 / 山地の風 / 地形模型実験 / 暴風災害予測 / 風害危険度想定図 / 岬周辺の風 |
|---|
| Research Abstract |
We have analyzed the topographical effects of wind forces for many years. Using statistical methods, we have analyzed the relationship between the distribution of damaged buildings resulting from typhoons and meteorological observation data such as wind velocity and direction.
To determine the characteristics of natural wind, we observed wind using balloons. In this study, we obtained the following conclusions.
1. Development of a wind observation system utilizing simplified aerial photogrammetry.
It is important, in the study of windengineering, to three-dimensionally determine on site the flow of natural winds near the ground surface.
We developed a system to measure the data of wind flow in both the horizontal and vertical directions utilizing aerial photographs. This system uses two cigar-shaped kite balloons on which are mounted 35mm still cameras, which stereophotograph third balloons released as a tracer, thereby three-dimenionally analyzing trajectory of the third balloon. 2. Observation trajectory of wind over buildings.
We utilized the system in observing the trajectory of wind over a building, and obtained some effectual results.
3. Field observation of winds on the ground surface at Myogane Point.
We carried out field observations to survey the wind direction and the wind velocity at Myogane Point, and analyzed the relationships between the local topography and the wind.
|
