Experiment and calculation on crack of reinforced concrete beams strengthened with near surface mounted CFRP-PCPs reinforcement

Based on the flexural experimental research of five reinforced concrete beams strengthened with near surface mounted carbon fibre reinforced plastics(CFRP)-prestressed concrete prisms (CFRP-PCPs composite reinforcement) of different control tension stress, the characteristics of mean crack width and maximum crack width were acquired with comparison and analysis of crack distribution and development under static loading. The results indicate that this type of the unique composite reinforcement has an inhibitory effect on development of crack width and crack height. Based on the calculation method for crack width in the current national standard and experimental data, the suggested maximum crack width of the reinforced concrete beams strengthened with near surface mounted CFRP-PCPs reinforcement under static loading was given. And the calculated values are revealed to be in reasonable matching the tested value.