RESEARCH ON MECHANICAL BEHAVIORS OF SLAB-COLUMN INTEGRAL STRUCTURE STRENGTHENED WITH BFRP

To research the effect and action of the basalt continuous fiber reinforced polymer (BFRP) strengthening in the integral structure, the compatibility torsional spandrel beams and eccentricity compression thin-walled columns of the unbonded prestressed slab-column structure model with 1 slab and 8 column which has destroyed are strengthened with BFRP, through the 16-point vertical static load test of the strengthened monolithic structure specimen, the bearing performance of the strengthened members is studied and analyzed. The results show: BFRP play a better role, the old torsional cracks of spandrel beams are observably restricted, and the new cracks are enormously delayed the appearance time. The rigidity of the strengthened members is not only better recovered but also enhanced. Because of the good compatibility of BFRP and the member, BFRP have no peeling off and share in the force of reinforcing steel bars, strengthening members still have a great bearing capacity.