1998 Fiscal Year Final Research Report Summary
Evaluation method and improvement of energy absorption of RC and PC structure member by using DFST
| Project/Area Number |
09650520
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
構造工学・地震工学
|
|---|
| Research Institution | Kanazawa University |
|---|
Principal Investigator |
MAEGAWA Koji Kanazawa University, Faculty of Technology, Professor, 工学部, 教授 (00124024)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
MAMAGHANI Iraj H.P. Kanazawa University, Faculty of Technology, Research Associate, 工学部, 助手 (90283100)
|
|---|
| Project Period (FY) |
1997 – 1998
|
| Keywords | Concrete-filled Steel Tube / Energy Absorption / Concrete Dowel / Composite Beam / Bond Strength |
|---|
| Research Abstract |
The RC and PC structures subjected to the impact-load such as earthquake and rock-fall are destroyed in brittleness. It is proposed that such a load having a low occurrence probability and huge energy should be absorbed by the plasticity deformation of structure. The development of structure members with excellent energy absorption and the establishment of its evaluation method are indispensable for that. This study has developed a new composite structure member by using concrete-filled steel pipe (CEST) instead of the compression steel-bars of RC and PC members and applied it to the structure which needs the high energy absorption. This report is arranged about the following items.
1. Push-out tests concerning bond strength of concrete-filled steel pipe (CFST) and the concrete block
(1)The concrete dowels, which are formed by using the bored steel-tube, are effective for the bond strength between the steel-tube and concrete block.
(2)The adhesion of steel-tube and concrete has been increased by the sand blasting processing of the steel-tube surface and/or by spreading adhesive agent on it.
2. Static bending test and impact load test on the composite beam reinforced with CFST were done. It was confirmed that toughness (deformability) was improved by using CFST for compression reinforcements.
3. Static bending load and axial force were applied on steel-tube and concrete composite column. The hole of the bored steel-tube becomes a defect, when the column is subjected to cyclic load.
4. Static load tests were done on a half-size model to simulate the real structure, i.e. rockshed.
|
