Upgrading the shear strength of reinforced concrete corbels using strain hardening cementitious composites

Hassan, Ali; Ellithy, Mohamed; El-Shafiey, Tarek F.

doi:10.1016/j.engstruct.2022.115047

Cited by 5 publications

(1 citation statement)

References 36 publications

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“…Previous studies show that, there is not considerable impact for the horizontal stirrups on cracking and ultimate loads of the RC corbels with HSC when comparing it with NSC. Besides, due to the direct tension stresses, the existence of horizontal loads increases vertical cracks [5][6][7][8]. The first research was regarding the behavior of corbels with a low longitudinal reinforcement ratio which explained that the failure of such members included yielding of the steel reinforcement which led to a ductile failure, while the corbels with a high ratio of steel reinforcement suffered from yielding of the concrete earlier than the steel rebar which led to a brittle failure [9,10].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Case study of shear strengthening of RC Corbels by steel plates using fea

Hashim

Abdulghani

Albegmprli

2023

EEJET

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The study aimed to explore the possibility of strengthening RC corbels with many strengthening techniques. The research analyzed the RC corbels behavior under a wide range of variables. The theoretical study consisted of twelve models reinforced with GFRP bars with strengthening by steel plate. Finite element analysis with ANSYS APDL was used to verify five specimens. This research deals with a static nonlinear FE simulation to investigate the behavior of RC Corbels reinforced internally and externally. The verification with experimental work demonstrated a satisfactory agreement in the load-displacement relationship, ultimate load and displacement, and failure mode. The parametric study was implemented which included strengthening the four concrete corbels externally and four corbels internally by a steel plate in many configurations while the remaining three were modeled with varied compressive strength (30, 40, and 50) MPa. The external strengthening included the placing of steel plate externally around the corbel in a U-shaped form and partial strengthening by strips and bottom plate. The models with internal strengthening involved placing the steel plate internally instead of stirrups. The results discovered that the strengthening provided enrichments in the stiffness, ductility, and energy absorption by 37 %, 4 %, and 26 %. In addition, in the case of full external strengthening more than internal retrofitting, there is a maximum improvement in the cracking and ultimate load carrying capacity. The external strengthening was better than internal one due to the confinement effect of the concrete. The stress distribution and crack pattern were affected by the strengthening techniques and more cracks appeared in the corbels with external steel plates.

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