2014 Fiscal Year Final Research Report
Occurrence mechanism of horizontal cracks in RC decks.
| Project/Area Number |
24560581
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
|
|---|
| Research Institution | Iwate University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2012-04-01 – 2015-03-31
|
| Keywords | 道路橋RC床版 / 水平ひび割れ / 収縮ひずみ |
|---|
| Outline of Final Research Achievements |
We investigate the mechanism of occurence of horizontal cracks in RC decks. As a main objective, we focused the shrinkage stress of concrete after casting. In most cases of occerence of horizontal cracks, the origination of cracks is near reinforcements in the decks. Then we tried to survey the local stress of concrete generated in near area of reinforcement just after casting.
In this survey, we carried out some experiments researches and FEM analysis with 3D model. we can't measure the local stress of concrete in the experiments because the existing area of local stress is very small. Then we calculated the local stress by FEM analysis. In this FEM analysis, we can find out the probability of occurrence of local stress around the reinforcements. And the magnitude of local stress is influenced to occurence of horizontal cracks under acting of live loads.
|
| Free Research Field |
維持管理工学
|
