An experimental study was conducted on the flexural behavior of reinfoced concrete beam strengthened by Polyvinyl Alcohol-Engineered Cementitious Composite(PVA-ECC) mortar subjected to one-off load and secondary load.Based on the comparison of the test results of six beams reinforced by PVA-ECC steel mesh and one general beams,the effect of tension reinforcement ratio on the flexural strength and deflections capacity was studied.Beams were reinforced with U-shape,and crack distribution,load-max deflection,s...