Effect of Transverse Compression on Web-crushing Strength of Reinforced Concrete I-shaped Beams

DOI

10.2991/aime-18.2018.114How to use a DOI?

Keywords

web-crushing strength; external shear strengthening; transverse stresses; reinforced concrete I-beams; shear force.

Abstract

The paper presents results of theoretical research of effect of transverse compression in a shear span zone on webcrushing strength of I-shaped reinforced concrete beams. The hypothesis of an increase of web shear strength in case of clamping by prestressed external strengthening transversal reinforcement was checked. The principal variable was the level of clamping stresses which was taken to be up to half of compressive strength of concrete. A shear span and a shear reinforcement ratio were also varied. Shear strength of I-shaped reinforced concrete beams was calculated using nonlinear rational model CSMM implemented in finite elements framework software OpenSees. Validity of the model for estimation of the shear strength gain due to transverse compression was proved by close prediction of results in similar analyses of I-shaped reinforced concrete beams. Fulfilled modeling demonstrated the increase of web-shear strength as a result of external shear strengthening. This effect is observed to a greater degree in cases of loadings with large shear spans. The largest increase of shear strength takes place in beams with transverse stresses in a range of 20 – 40% of compressive strength of concrete decreasing with further growth of the clamping stresses level. The found effect and accuracy of its estimation need to be verified by special experimental research

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - V.P. Pochinok
AU  - E.V. Greshkina
AU  - M.A. Tamov
AU  - M.M. Tamov
PY  - 2018/04
DA  - 2018/04
TI  - Effect of Transverse Compression on Web-crushing Strength of Reinforced Concrete I-shaped Beams
BT  - Proceedings of the International Conference "Actual Issues of Mechanical Engineering" (AIME 2018)
PB  - Atlantis Press
SP  - 595
EP  - 600
SN  - 2352-5401
UR  - https://doi.org/10.2991/aime-18.2018.114
DO  - 10.2991/aime-18.2018.114
ID  - Pochinok2018/04
ER  -