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Title Flexural Behavior of Lightweight Aggregate Concrete T-Beams with Minimum Longitudinal Reinforcement Ratios
Authors 임채림(Chae-Rim Im) ; 양근혁(Keun-Hyeok Yang) ; 문주현(Ju-Hyun Mun)
DOI https://doi.org/10.4334/JKCI.2020.32.4.307
Page pp.307-315
ISSN 1229-5515
Keywords 경량골재 콘크리트; 최소 인장 철근비; 보; 휨; 연성 lightweight aggregate concrete; minimum longitudinal reinforcement ratio; beam; flexure; ductility
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.