Modification of strut effectiveness factor for reinforced concrete deep beams strengthened with CFRP laminates

• Main Authors: Panjehpour, Mojtaba, Abang Ali, Abang Abdullah, Voo, Yen Lei, Abd Aziz, Farah Nora Aznieta
• Format: Article
• Published: Consejo Superior de Investigaciones Cientificas (C S I C) 2014
• Online Access: http://psasir.upm.edu.my/id/eprint/34562/; http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1476
• Institution: Universiti Putra Malaysia

This paper proposes a method to modify the strut effectiveness factor in the strut-and-tie model for CFRP-strengthened reinforced concrete deep beams. Two groups of deep beams comprising six ordinary reinforced concrete deep beams and six CFRP-strengthened reinforced concrete deep beams were experimentally tested under the four-point bending configuration. The shear span-to-effective depth ratio of the beams in each group was 0.75, 1.00, 1.25, 1.50, 1.75, and 2.00. The theoretical principal tensile strain in CFRP-strengthened struts was modified based on a proposed empirical relationship, based on two ratios: the experimental to the theoretical value of principal tensile strain and the shear span-to-effective depth of deep beams.