1997 Fiscal Year Final Research Report Summary
Study on Optimum Ratio of Inner Cable and External Cable in Prestressed Concrete Bridges Stiffened with External Cable
| Project/Area Number |
08650524
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
土木材料・力学一般
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| Research Institution | Akita University |
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Principal Investigator |
KAWAKAMI Makoto Akita University, Mining College Civil Engineering Professor, 鉱山学部, 教授 (90006693)
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| Co-Investigator(Kenkyū-buntansha) |
KAGAYA Makoto Akita University, Mining College Civil Engineering Associate Professor, 鉱山学部, 助教授 (00091794)
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| Project Period (FY) |
1996 – 1997
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| Keywords | External Cable / Optimum Ratio of Inner Cable and External Cable / Cracking Strength / Ultimate Strength / Time-Dependent Stress Analysis / Composite Prestressed concrete Bridge |
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| Research Abstract |
1) Bending tests of prestressed composite box girder with steel trussed web were carried out to clarify cracking strength, ultimate strength and collapse mode.
2) The above test results from elastic state to ultimate state of the girder were compared with theoretical ones analyzed by plane frame computer program of finite element method. Furthermore, parametric analysis was performed and the results were summarized.
3) Based on the above test results and parametric analysis, the optimum ratio of inner cable and external cable was discussed.
4) The long-term deformation test was measured. Own weight and prestressing force are the sustained load. Displacements and strains due to creep and shrinkage of concrete were measured more than one year.
5) Time-dependent stress of the structures with external cable were analyzed and its computer program was Developed.
6) The test results of long term deformation were compared with the analyzed results.
7) The optimum ratio of inner cable and external cable in the structures with external cable considering the long-term deformation, was investigated.
8) All results of two years from 1996 to 1997 were summarized and the repot was completed.
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