Experimental Study On Flexural Behavior Of RC Beams Strengthened With Near-surface Mounted FRP Under Different Damages

At present,the study of flexural behavior test of reinforced concrete beam under different damages,mostly by strengthened with CFRP-sheets.The method of Near-surface mounted FRP is better than that of FRP surface paste,but the studies in this field is very little currently.This experiment strengthened RC beams by method Near-surface mounted FRP,and the flexural behavior of reinforced beam under different damages was studied.By designing reinforcement scheme of 13 beams,the RC beams strengthened by material of FRP are studied.The reinforced beams are divided into four groups.In group one,there are three beams with slot of two Near-surface mounted CFRP plate under different damages.In group two,there are three beams with three slot of Near-surface mounted CFRP plate under different damages.In group three,there are three beams with two slot of Near-surface mounted CFRP wires under different damages.In group four,there are three beams with two slot of Near-surface mounted BFRP wires under different damages.The study focuses mainly on the following several aspects.The first is flexural behavior of test beams in each reinforcement method under different damages.The second is the influence of slot number to the CFRP plate reinforcement.The third is the influence of different material to reinforcement.On the basis of the test,in order to analyze the flexural behavior of reinforced beams,taking the beam section size,reinforcement ratio,wire diameter,concrete elastic modulus as well as the elastic modulus of steel and embedded material as parameters,based on the building construction standards,technical regulations and the theoretical calculation of Hao Yongchao or others,then the theory are needed to be compared with the test results at last.