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http://dx.doi.org/10.4334/JKCI.2012.24.2.157

Shear Behavior of Reinforced Concrete Beams according to Replacement Ratio of Recycled Coarse Aggregate  

Kim, Sang-Woo (Dept. of Architectural Engineering, Kongju National University)
Jeong, Chan-Yu (Dept. of Architectural Engineering, Kongju National University)
Jung, Chang-Kyo (TNI Structural Engineering)
Kim, Kil-Hee (Dept. of Architectural Engineering, Kongju National University)
Publication Information
Journal of the Korea Concrete Institute / v.24, no.2, 2012 , pp. 157-164 More about this Journal
Abstract
This study evaluates the shear performance of reinforced concrete beams with recycled coarse aggregates. A total of six specimens with various replacement ratios of recycled coarse aggregates (0%, 50%, and 100%) and different amount of shear reinforcement were cast and tested in this study. A finite element analysis was performed to predict the shear behavior of the specimens with natural or recycled coarse aggregates. The FE analysis was performed using a two-dimensional nonlinear FE analysis program based on the disturbed stress field model (DSFM), which is an extension of the modified compression field theory (MCFT). Experimental results showed that the specimens with 50% and 100% replacement ratios of recycled coarse aggregates had the similar shear strength compared to the specimen with natural aggregates, regardless of the replacement ratios of recycled coarse aggregates and the amount of the shear reinforcement. Furthermore, the comparison between experimental and analytical results showed that the proposed numerical modeling methods and the analytical model, DSFM, can be successfully used to predict the shear behavior of reinforced concrete beams with recycled coarse aggregates.
Keywords
recycled coarse aggregates; shear behavior; RC beams; replacement ratio;
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