The Simulated Analysis Of A CFRP Prestressed Concrete Continuous Beam Mechanical Performance

With the rapid development of FRP reinforcement materials and a wide range ofapplications in industrial and civil construction in recently years, the replace of ordinary steelbar with FRP reinforcement is one of the directions of many scholars. This kind of fiber has highstrength, light weight, corrosion resistance, fatigue resistance and other advantages. Conversely, in concretestructure caused by high intensity, it is hard to discern obvious yield point which will cause a super muscledamage. Meanwhile, low elastic modulus properties which causes large cracks in the beam, also is notsafe,and is difficult to give full play to its material properties. Consequently, we adopt the form of FRP+ordinary reinforced to recearch the mechanical properties of the beam itself in T prestressedcontinuous beam. The thesis mainly consists of the following parts:(1) By simulated and analyzed forepassed test with learned ANSYS finite element software,to explore the defitiontion and calculation method of the modeling method, unit selection,material properties, the constitutive relation.Compared the experiment result, the deviationmeet the requirmet in specification. It proves that the finite element model is reliable.(2) Analysis of the actual operating model by establishing model with same method, toexplore the stress behavior of CFRP prestressed concrete continuous beam and analyze themain parameters affecting beam force performance. It is concluded that the mainproperties influence factors of continuous beam are concrete strength value and effectiveprestress value.(3) The second kind of muscle failure mode as the research key is adopted and also apply thebalanced reinforcement ratio to discuss the failure mode of the CFRP prestressed concretecontinuous beam selection. Obtained the model parameters in this paper are listed to meetsuch a form of destruction.(4) Rearch remodeling behavior of the CFRP prestressed concrete continuous beam by thecoefficient of moment redistribution. Due to difficulity seeking the actual yield point ofthe linear elastic stress and strain of the CFRP tendons, we only discuss how much weightdistribution will happen from the middle upper bearing crack beam stiffness change, tillthe last beam damage. In the process, we change affect the beam bending momentredistribution of tension stress, prestress ratio and compression zone height to get theconclusion that the mainly effection of force redistribution edistribution ability is prestressratio.