FRP-strengthened and all-FRP structures paper
Wang, DY, Wang, ZY & Smith, ST 2014, 'Experimental study on the seismic performance of full-scale interior RC beam-column joints retrofitted with FRP composites', in ST Smith (ed.), 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), vol. I, Byron Bay, NSW, 9-12 December, Southern Cross University, Lismore, NSW, pp. 441-446. ISBN: 9780994152008.
The use of fibre-reinforced polymer (FRP) composites for the seismic retrofitting of reinforced concrete (RC) beam-column joints has received research attention to date. Limited research though has considered the influence of slabs and orthogonal beams that are cast integral with such joints. This paper presents the details and results of a quasi-static test investigation on four full-scale interior RC beam-column joints with integral slabs and orthogonal beams that were seismically retrofitted using FRP composites. One specimen was used as a control specimen, and the remaining three specimens were retrofitted with different FRP schemes. All four joints were subjected to similar constant axial compression load and reversed cyclic loading which was applied at the top of the column. The influence of the slab and orthogonal beams per test specimen, as well as the efficiency and effectiveness of different FRP rehabilitation schemes were investigated. The test results indicate that the beam bending stiffness was significantly improved due to the inclusions of the slabs. All retrofitting schemes improved the energy dissipation and ductility capacity of retrofitted joints, but the shear resistance was increased only slightly. The failure mode of the control joint was by a columnhinge mechanism, however, after retrofitting with FRP composites, the failure mode of the joints changed to a more desirable beam-hinge mechanism.