Cracking Behaviour of Simply- Supported RC Beams at Shear Failure.

Mehreen Zeenat Heerah , Kousay Al-Sanjery, Horng Hean Tee

ABSTRACT

Objective - The aim of this paper is to study the effect of different shear span on the inclination of the cracks and the effect of shear reinforcement at shear failure.

Methodology/Technique - The results were compared with EC2 and ACI-138. Four RC beams, designed according to EC2, were tested using the four-point loading test. The beams had the same dimensions, reinforcement and concrete strength. One beam acted as a control beam and was not provided with shear reinforcements while the other three were provided in their shear span

Findings - It was found that firstly, the inclination of cracks increased as the shear span to depth ratio decreased. Secondly, the theoretical angle of inclination of the cracks calculated according to EC2 is closer to the experimental angle than that assumed in ACI-138. Lastly, the addition of shear reinforcement increased its shear capacity and ductility.

Novelty - Throughout the history of construction, the study of shear has been considered to be complex and till now research is still being done to understand its mechanism. Shear failure is considered to be dangerous due to its brittle nature.

Type of Paper: Empirical

Keywords: Shear failure; cracks; Four-point loading test; Eurocode 2; ACI-138

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