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Structural behaviors of deep RC beams under combined axial and bending force

Title
Structural behaviors of deep RC beams under combined axial and bending force
Authors
Kim H.S.Lee M.S.Shin Y.S.
Ewha Authors
김희선
SCOPUS Author ID
김희선scopus
Issue Date
2011
Journal Title
Procedia Engineering
ISSN
1877-7058JCR Link
Citation
vol. 14, pp. 2212 - 2218
Indexed
SCOPUS scopus
Abstract
This paper presents experimental studies of deep reinforced concrete (RC) beam behaviors under combined axial and bending loads. In order to investigate the effect of axial loads on the structural behaviors of the deep RC beams, specimens are prepared to have different shear span-to-depth ratios and subjected to axial loads of 235kN or 470kN. From the experiments, structural behaviors such as failure modes, load-deflection relationships, and strains of steel bar and concrete are observed. As results, for the deep beam with shear span-to-depth ratio of 0.5, load at the beam failure decreases as applied axial load increases, while the deep beams with shear span-to-depth ratios of 1.0 and 1.5 show that the applied axial load delays the beam failure. In addition, failure mode of the deep beam changes from shear failure to concrete crushing due to compressive stress at the top corners of RC beams as shear span-to-depth ratio decreases. From the experiments, it is important to notice that deep beam with relatively small span-to-depth ratio under axial load shows early failure due to concrete crushing, which cannot be directly applied to widely known design method for deep beam, strut-to-tie model.
DOI
10.1016/j.proeng.2011.07.278
Appears in Collections:
엘텍공과대학 > 건축공학전공 > Journal papers
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