Strength Of Post-Tensioned RC Beams Using FRP Strips For Bending Moment

Abstract

The increasing use of prestressed reinforced concrete structures in the construction industries, and their applications have varied in bridges, high com

mercial and residential buildings, to where the beams show complex features and heavy loads.

Prestressed concrete structures have many advantages, such as less cracks, material savings, and reduce deflection.

In this research, an analytical study was conducted by using the finite element method and nonlinear analysis using (Abaqus-2021) Which takes into account the material nonlinearity of un bonded post-tensioned reinforced concrete beams strength with (CFRP) strips, Empirically tested by (Q.T.P.TRUONG et al., 2017).

The experimental and analytical results were compared, and a parametric study was conducted to study the effect of using different anchorage systems for CFRP strips.

This paper shows that the effectiveness of strengthening post-tensioned reinforced concrete beams using (CFRP) strips on bending is increased by using U anchorage systems, The bearing capacity of the strengthed beam with (CFRP) strips which contain U-shape anchorage systems increased to 16.7% of the bearing capacity of the unstrengthed beam, and the deflection decreased about 6% of the resulting share in the strengthed beam without using the anchorage system.