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Authors |
송형수 ; 이진용 ; 윤동용 ; 민창식 ; 최동욱 |
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Keywords |
앵커 ; 단면보수 공법 ; 계면응력 ; 열응력 ; 폴리머 시멘트 모르타르 anchors ; repair method ; interface stresses ; thermal stresses ; polymer cement(modified) mortar |
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Abstract |
Recently, the damaged concrete structures are often strengthened or repaired using the polymer concrete or the polymer cement mortar. In the repaired concrete structures at early ages, internal stresses could be developed due to the differential drying shrinkage of the repair material. Due to the difference of the thermal coefficients of the repair material and existing concrete, additional stresses also could be developed as the structures are subjected to the ambient temperature changes. Theses environmentally-induced stresses can sometimes be large enough to cause damage to the structures, such as debonding of the interface between the two materials. In this study, a rational procedure was developed where anchors can be designed and installed to prevent damages in such structures by thermally-induced stresses. Finally, through the experimental study and numerical study, the effects of the repair method using anchors with debonding was investigated and discussed the results.
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