CACULATION METHOD AND EXPERIMENTAL STUDY ON CORRODED RC BEAMS STRENTHENED BY STEEL PLANT ANCHORED WITH STUD

Based on the model of truss theory, taking the influence of the mechanical behavior of corroded reinforcements, the thickness of a steel plate, the bond strength, and the thickness of a cover on the capacity of beams into accounts quantitatively, a calculation method for the ultimate load-carrying capacity of corroded RC beams strengthened by steel plates anchored with studs is proposed. The theory model is verified by conducting tests on 9 RC beams strengthened by steel plates anchored with studs, and by 3 corroded RC beams and 3 strengthened RC beams without corroded reinforcements. Experimental results and theoretical results show that a 1mm increase in the thickness of a steel plate will result in 15kN~20kN increase in bearing capacity under same cover thickness and a close corrosion rate, and under the situation of different corrosion rates, an increase in the corrosion rate of 2%~3% of results will cause a decrease in bearing capacity about 10kN.