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Volume Title: ICASGE2023

DOI: ICASGE-RCS

¹Mohamed Ghalla ; ²Ahmed Almaadawy; ³Mahmoud Elshamy; ³Galal Elsamak

¹Civil Engineering Dept., Faculty of Engineering, Kafrelsheikh University, Kafrelsheikh, Egypt

²Civil Engineering Department, Faculty of Engineering, Kafrelsheikh University, Kafrelsheikh, Egypt.

³Faculty of Engineering, Kafrelsheikh University, Egypt

Inverted T-shaped beams are being selected to be used as the main girders that support the lateral secondary precast beams or slabs which is one of the popular structural systems for many existing bridges and parking garages. This paper presents numerically different strengthening strategies for reinforced concrete (RC) inverted T-beams based on finite element analysis (FEA), in which ultra high performance fiber reinforced concrete (UHPFRC) plates are affixed to RC inverted T-beam using epoxy adhesive to improve the shear capacity. Two different experimental works of literature were selected in order to validate the beam numerical models. Beams were modelled using 2D shell element model to reduce the central processing unit (CPU) time and one half of beam was simulated to take the advantage of symmetry. The strengthening techniques included, two-sided strengthening, one-sided strengthening, vertical strips, and U-shaped strengthening technique. The FEA results showed that the two-sided strengthening increased the ultimate load, stiffness, and ductility and changed the failure pattern from shear to flexural. However, the one-sided strengthening provides an increase in ultimate load close to two-sided strengthening but could not be able to change the failure pattern of the control beam.

Inverted T-shaped beams; UHPFRC; strengthening; FEM

Reinforced Concrete Structures (RCS)