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Title |
Flexural Behavior of Lightweight Aggregate Concrete T-Beams with Minimum Longitudinal Reinforcement Ratios
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Authors |
임채림(Chae-Rim Im) ; 양근혁(Keun-Hyeok Yang) ; 문주현(Ju-Hyun Mun) |
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DOI |
https://doi.org/10.4334/JKCI.2020.32.4.307 |
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Keywords |
경량골재 콘크리트; 최소 인장 철근비; 보; 휨; 연성 lightweight aggregate concrete; minimum longitudinal reinforcement ratio; beam; flexure; ductility |
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Abstract |
The objective of this study is to estimate the flexural performance of lightweight aggregate concrete (LWAC) with minimum longitudinal reinforcement ratio () specified in KCI 2017 provision and propose a correction factor () for use in LWAC beams to retain a behavior equivalent to the flexural ductility of the companion normal-weight concrete (NWC) beams. The flexural ductility values of beams were assessed for four T-beam specimens and 2-dimensional non-linear analysis procedure. The displacement ductility ratio () of the LWAC T-beams tended to increase with the decrease in longitudinal reinforcement ratio () but decreased inversely when approaches . This trend was more notable for the beams with a lower concrete unit weight (). Thus, from the comprehensive parametric study conducted on the basis of the non-linear analysis, the value of could be proposed as a function of . This indicates that for LWAC beams needs to be increased with the decrease in with respect to an equivalent ductility of the companion NWC beams.
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