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Title |
A FEA Study on the Bond Property according to the Rib-Shape of Reinforcement
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Keywords |
부착응력 ; 마디형상 ; 마디면적비 ; 유한요소해석 Bond Stress ; Rib Shape ; Relative Rib Area ; FEA |
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Abstract |
Effects of various parameters on bond property between reinforcing bar and concrete are investigated in many researchers, and various study is on going to improve the bond strength. Properties of interface between reinforcement and concrete is important role in bond property. This study analyzed the interfacial bond mechanism between deformed bar and concrete by finite element analysis (FEA) to evaluate the effect of rib shape. The FEA model in this study is simplified 2D plane stress model. The variables of analysis are selected by rib angle, rib height, rib spacing and relative rib area. From the results of analysis, reinforcing bars with rib angle 30~60° showed better bond strength than the others. Bond strength ratio following to the rib height is proportionally increased up to the 0.12db, but rib spacing has little effect on bond strength. The results also indicated that relative rib area can be efficiently represented the properties of deformed shape in reinforcing bars, and zigzagged rib height shape showed excellent bond strength increase.
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