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Title |
Flexural Analysis of RC Beam Considering Autogenous Shrinkage Model
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Authors |
유성원 ; 소양섭 ; 조민정 ; 고경택 ; 정상화 |
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Keywords |
자기수축; 고성능 콘크리트; 예측식; 유한요소해석 프로그램; autogenous shrinkage; high-performance concrete; prediction equation; finite element program |
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Abstract |
Recently, it is noticed that autogenous shrinkage of high-performance concrete causes early crack in high performance concrete structures. The purpose of the present study is to derive a realistic equation to estimate the autogenous shrinkage of high performance concrete and to apply to structural analysis. For this purpose, several series of concrete specimens have been tested. When water-binder ratio is fixed to 30%, major test variables were the type and contents of mineral admixture. The autogenous shrinkage of HPC with fly ash slightly decreased than that of OPC concrete, but the use of blast furnace slag increased with the autogenous shrinkage. A prediction equation to estimate the autogenous shrinkage of HPC with mineral admixture was derived and proposed in this study. The proposed equation show reasonably good correlation with test data on autogenous shrinkage of HPC with mineral admixture. The finite element program developed in this study provides the useful tool for the flexural analysis including the autogenous shrinkage model. By this program, we know that the tensile stress considering the autogenous shrinkage of reinforced concrete structures increase 20~27% than that not considering.
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