| Project/Area Number |
11450208
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Building structures/materials
|
|---|
| Research Institution | Yokohama National University (2001)
Kyoto University (1999-2000) |
|---|
Principal Investigator |
TASAI Akira (2001) Yokohama National University, Faculty of Engineering, Associate Professor, 工学研究院, 助教授 (40155057)
藤井 栄 (1999-2000) 京都大学, 工学研究科, 助教授 (70144334)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KONDO Goro Chiba University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (30195896)
KONO Susumu Kyoto University, Faculty of Engineering, Associate Professor, 工学研究科, 助教授 (30283493)
NAGATA Masayuki Yokohama National University, Faculty of Engineering, Professor, 工学研究院, 教授 (40282959)
佐藤 裕一 京都大学, 工学研究科, 助手 (20293889)
田才 晃 横浜国立大学, 工学部, 助教授 (40155057)
|
|---|
| Project Period (FY) |
1999 – 2001
|
| Project Status |
Completed (Fiscal Year 2001)
|
| Budget Amount *help |
¥14,100,000 (Direct Cost: ¥14,100,000)
Fiscal Year 2001: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2000: ¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 1999: ¥7,500,000 (Direct Cost: ¥7,500,000)
|
|---|
| Keywords | Concrete / Reinforcement material / Continuous fiber / Bond / Shear / Confinement / Section analysis / Mechanical anchorage / 鉄筋コンクリート / 補強財 / 応力-ひずみ曲線 / 付着すべり / ひびわれ / 曲げ / 応力―ひずみ曲線 / 繊維補強材 / 高強度鉄筋 |
|---|
| Research Abstract |
Experimental and analytical investigations were conducted on the mechanical characteristics of hybrid RC members reinforced by continuous fibers. The members consisted of different kinds of reinforcement with respect to strength, elastic modulus, hysteric response and ductility. The properties related to flexural, shear and bond characteristics were mainly discussed. Carbon fibers were more effective than aramid fibers to reinforce concrete members, because the high elastic modulus of carbon fibers performed to prevent expanding of cracks. Conventional formulas recommended in AIJ guidelines or formulas by modified compression field theories overestimated the shear strength of hybrid RC members. However, analysis based on truss analogy combined with sector truss mechanism considering bond stress distribution along main steel rebar well-predicted experimental results, Experimental and analytical investigations were also conducted to study development of damages in hinge zones of reinforced concrete columns. Sufficient confinement for hinge zones was significantly effective to control the deterioration of bending moment capacity to be small. Simple inelastic section analysis considering confinement for concrete predicted the observed moment vs. curvature and axial strain vs. curvature relationships precisely. Accurate formula to estimate anchorage strength of main rebar anchored mechanically into RC members was proposed in case of side-splitting failure of concrete around the rebar.
|
