A Study on the degradation of performance of PC beam due to ASR expansion under the effect of material deterioration and constraint by prestressing tendon
| Project/Area Number |
15K18101
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Civil engineering materials/Construction/Construction management
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Research Collaborator |
HAMADA Hidenori
SAGAWA Yasutaka
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | ASR膨張 / 内部拘束 / ひび割れ密度 / ひび割れ幅 / 損傷の方向性 / 拘束条件 / 内部ひび割れ / 表面ひび割れ / 力学的性質の低下 / ASR / 材料劣化 / 性能低下 / 力学的性能低下 / 耐久性能 / 耐荷性能 |
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| Outline of Final Research Achievements |
This Research was conducted with the purpose of clarifying the relation between material degradation state and reduction of performance under occurrence of internal cracks due to ASR expansion. The research topics could divided into 3 parts.(1) Method of estimating material deterioration degree from internal crack observation.(2) Organizing the influence of restraint effect by steel on ASR crack suppression.(3) Clarify the relationship between material degradation state and occurrence situation of internal cracks, and load carrying capacity under the condition of constraint by steel bar using ASR deteriorated ASR beam specimens.
As a result, crack length was suppressed in the case of damage caused by ASR under restraint, in the damaged state with large crack width, it is necessary to consider crack width, and if there is no constraint in the direction perpendicular to the axis, It was confirmed that damage direction occurs in the cracks.
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Report
(3 results)
Research Products
(17 results)
