CFRP-OFBG Application Research On Intelligent Carbon Fiber Board Performance And Reinforcement

With the rapid development of our country’s economy and technology, more andmore steel structures had been damaged. Therefore, it is necessary to strengthening thesteel structures which is in dangerous. To make the best use of the existing structure andovercome the disadvantages of steel beam’s multiple and uncertainty broken. We eager tofind out intelligent monitoring material which use low energy, work in high efficiency andcan testing the structures while strengthing. Such a kind of new material is not only haveimportant significance to the strenthing of steel beams, it also closely connected with ourcountry’s socialist economy development.The purpose of this paper is to study the properties and the application ofCFRP-OFBG smart sheet. The artical based on the national natural science project“performance and intelligent monitoring technology research of prestressed CFRP plates reinforcedsteel structures”(51108099), the main research of this paper contents and results were asfollows:(1)According to the flexible amplification side designed method, designs the test inCFRP sheet package way. And put forward the feasibility process of the CFRP sheetpackage way.(2)Design the CFRP-OFBG sheet that integration of the reinforcement and intelligentdetection. And then, conduct the material performance, strain and temperature sensors toexperiment. The results shown that CFRP-OFBG sheet and CFRP plate materialperformance are almost the same, CFRP-OFBG sheet have well sensors with strain andwavelength. Strain sensing sensitivity of1.281pm/με, measurement range up to10186με,temperature sensing sensitivity of11.745pm/℃.(4)Did the experiment and finite element simulation of bending steel beam reinforcedby prestressed CFRP sheet. Designed the combine and ragid body why to simulation thebond of the experiment. The results obviously shown that the bending steel beamreinforced by prestressed CFRP sheet can increase the stiffness and bearing capacity of thespecimens, combine and ragid unit shows good in the results of simulation.(3)Using the calculation method of fracture mechanics to estimate the residual fatiguelife of fatigued steel beam reinforced by CFRP sheet.And proved the formula according tothe experimental data and reasonable fatigue finite element analysis model. The resultsshown that the calculated value, experimental and simulated values are fitted on very well.At the same time, it also proves the calculation of the residual fatigue life is useful.