Jordan Journal of Civil Engineering

Paper Detail

OPTIMAL SHEAR STRENGTHENING OF SEVERELY DEFICIENT RC BEAM USING JFRP LAMINATE WITH ANCHOR

Volume 17, No. 4, 2023
Received: 2023/04/10, Accepted: 2023/08/09

Authors:

Md Ashraful Alam; Md Moshiur Rahman; Jahidul Islam;

Abstract:

High strength jute fibre reinforced polymer (JFRP) laminate has recently been introduced to strengthen RC beam against shear. In contrast to synthetic-based composite, JFRP laminate would be more ductile, compatible with steel shear rebar, and effective in reducing debonding due to its lower modulus of elasticity. The prime objective of the research was providing an optimal solution to strengthen severely deficient RC beam against shear using externally bonded JFRP laminate with anchors. Fabrication of the JFRP laminate was carried out with the maximum fibre content (37.5%) to obtain high tensile strength. Five full scale RC beam specimens were casted. Shear strengthening was done by JFRP laminate with double connector, multiple connector and embedded bar anchor systems. The dimension of JFRP laminate was obtained based on proposed guideline. According to test results, the JFRP laminate with multi-connector anchor increased the maximum shear capacity of deficient RC beam by 89%, and the beam had failed by fracture of laminate. Beams strengthened with embedded bar anchor had shown flexural ductile failure. Both beams failed after yielding of flexural bar. The guideline of JFRP laminate for optimal shear strengthening was satisfactorily verified through experimental findings.

Keywords:

RC beam; shear strengthening; JFRP laminate; anchor, optimal design