Materiales de Construcción, Vol 64, No 314 (2014)

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


https://doi.org/10.3989/mc.2014.02913

M. Panjehpour
University Putra Malaysia,, Malaysia

A. A. A. Ali
University Putra Malaysia,, Malaysia

Y. L. Voo
DURA Technology, Malaysia

F. N. Aznieta
University Putra Malaysia,, Malaysia

Abstract


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.

Keywords


Deep beam; Strut effective strength; CFRP; Shear; Strut-and-tie model

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