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Volume Title: ICASGE2023

DOI: ICASGE-RCS

Ebrahim Khalil Khalil ; Ebrahim Khalil Khalil

Faculty of Engineering, Tanta University, Egypt

Since the first decades of the previous century, non-prismatic beams have been used in various structures, including buildings and bridges. With the beams being arched, the architects would be able to create and implement novel aesthetic architectural designs. Moreover, the structural engineers could achieve optimum low weight-high strength systems. However, the mechanism of the flexural failure of such beams is not well understood, and there is a scarcity of research on this topic. So, the current paper presents a strengthening technique for non-prismatic beams with a lower arched shape to enhance their flexural resistance. The proposed strengthening method was adding a thin layer of Strain Hardening Cementitious Composites glass fiber textile mortar (GFTM-SHCC) at the soffit of the concrete substrate. The obtained results demonstrated that the GFTM-SHCC strengthening system improved the load carrying capacity and stiffness of the tested beams, especially when an anchorage system was applied. The average enhancement of the ultimate load reached up to 51% with respect to the un-strengthened reference specimen.

Flexural strengthening; Non-prismatic beams; Strain-hardening cementitious composites (SHCC); Glass fiber reinforced polymer (GFRP); Crack width

Reinforced Concrete Structures (RCS)