2016 Fiscal Year Final Research Report
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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| 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 |
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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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| Free Research Field |
コンクリート工学
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