Real-time simulation and evaluation of load effects for smart CFRP-strengthened RC beams

The smart composite material can be prepared by pre2embedding FBG sensors into CFRP laminates.Four pieces of RC beams were prepared in the experiment s , where FBG sensors and elect ric st rain gauges were preembedded in the steel , concrete and CFRP in RC beams. A numerical simulation program for flexural load effect s ofRC beams was compiled based on the theory of reinforced concrete and finite element sof tware ANSYS. The experimental result s show that during the load bearing process , the linear relationship of FBG sensor and elect ric st raingauge is uniform; the numerical simulation result s and the measuring result s of st rains in the tensile steel and thecompressive concrete , and the load vs the mid-span deflection agree well. The under-servicing RC structures are difficult to mount sensors internally (because the st ructure will be dest royed and the resistance force will be reduced) ,so utilizing the smart CFRP st rengthened RC st ructures can realize the dual function of advanced rehabilitation andreal-time health monitoring and assessing.