| Project/Area Number |
14J01638
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 国内 |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | The University of Tokyo (2015)
Hokkaido University (2014) |
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Principal Investigator |
弓 扶元 東京大学, 大学院工学院, 特別研究員(PD)
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| Project Period (FY) |
2014-04-25 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2015: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2014: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | concrete / frost damage / combined effect / mesoscale analysis / RBSM / mechanism / Mesoscale simulation / Concrete / Frost damage / Fatigue loading / Rigid Body Spring Method / Pore pressure / Combined effect |
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| Outline of Annual Research Achievements |
This research is mainly to develop a mesoscale analyzing system for the frost damage problems of concrete structures, together with the combining effects by external loads. Till now, the comprehensive physical and mechanical model, as well as the numerical method are still absent, which are the main purposes of this research project.
The original research plan has been accomplished well. Two journal papers for the physical model and numerical simulation of pure frost damage; one paper (under review) for the modeling and simulation of combined frost action and static loads; another one (under writing) for the combined frost effect with fatigue loading. Several conference papers are also published. The details of outcomes are as follows:
(1) The theoretical physical model has been developed to calculate the pore pressures generated inside the concrete material under variation of temperatures and moist conditions. (2) The mesoscale simulation model has been developed based on Rigid Body Spring Model (RSBM), and using the pore pressure model developed above, the material deformation can be simulated. (3) Based on the multi-phase composite theory, the expression of effective elastic modulus and strength of concrete with different amount of ice, liquid water and air is developed and simulated by RBSM. (4) The constitutive model for RBSM under fatigue loading is modified, and combining with frost damage caused by internal pressures. The S-N curve for FTC undamaged and damaged concrete are simulated.
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| Research Progress Status |
27年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
27年度が最終年度であるため、記入しない。
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