The Method Of Calculation And Simulation Of Bearing Capacity Of Reinforced Concrete Beam

Carbon fiber reinforced composite (CFRP) is a new composite material which is widelyused to replace the traditional material for reinforcement in structural reinforcement, has beenvery widely used. It has many advantage in structure, the domestic study on it is alsoincreasing; thin-walled box beam as a beam results have good mechanical properties, havemany advantages over other box girder type, in long span bridge is a girder structure common.Reinforced concrete beams with general failure model of bending and shearing failure, inwhich two forms of damage, brittleness is suddenly broken, component instantaneous losebearing capacity, is also causing huge losses. Ductile failure in the process of building will betwo times the stress distribution, there are obvious signs, such as bridge disturbance throughthe large, people can be reinforced after the discovery. In the concrete beam reinforcement,usually flexural capacity and shear capacity calculation. The most important is to calculate thebending bearing capacity, but now the theoretical research is not a systematic method to solvemany problems found. Bending and shear reinforcement, the most widely used surfacesticking CFRP cloth, embedded reinforcement is a new technology in foreign countries, a fewin the wood and masonry structure reinforcement application, application in domestic is notpractical, but also requires the scholars and engineering technicians to do plenty of researchon theory and experiment. This paper first introduces the structure characteristics of box typeinterface of reinforced concrete beams, and introduces various methods of reinforcementconcrete beam reinforcement and bearing capacity calculation method, and the finite elementsimulation analysis, specific work is as follows:(1) First derived in consideration of initial strain conditions, calculation formula ofbearing capacity of reinforced concrete thin-walled box beam flexural limit of CFRP, andgives a simplified calculation method of practical engineering for reference in engineeringpractice. We derive in section conditions, without considering the bond failure circumstances,reinforced concrete beam after reinforcement embedded CFRP bending bearing capacitycalculation method, and discusses various bound failure condition. Finally on the bond failureunder the condition of bearing capacity of reinforced concrete beams strengthened with NSMare discussed, presents a comparison with calculation method of bearing capacity of the actualengineering.(2) By ANSYS finite element software for box girder bearing capacity of the beamsstrengthened with CFRP are analyzed, and according to the experimental data for the finiteelement analysis results and the theoretical results of the analysis, more verified. The feasibil-ity of the The feasibility of the method, at the same time, the calculation method of bearingcapacity of reinforced concrete beams, especially for calculation of the factors involved a lot of carbon fiber reinforced plastic bearing capacity of reinforced concrete beams thereinforcement, method may not be uniform, and CFRP repair capacity of reinforced concretethin-walled box girder strengthening calculation, due to the factors of winged edgedeformation caused by shear lag phenomenon, the calculation of bearing capacity is morecomplex. The calculation of bearing capacity of this article were related to assume more, thederivation of the formula has certain application value.