Comparisons Of Design Methods Of Shear Capacity And Flexural Capacity Using Fiber Reinforced Polymer In Concrete Beam

In the last two decades,innovation has been used in the field of construction and civil engineering.One of them is fiber reinforced polymer reinforcement technology,fiber composite materials since the 1960 s with the aerospace industry and other cutting-edge technology to meet the stringent requirements of composite materials and new materials,with corrosion resistance,high strength,elastic modulus and steel similar Such as CFRP and anti-fatigue performance,etc.,because of its relatively high prices,in 1970,1980 period,the composite materials were mainly used for aerospace and other high-tech fields.In recent years,with the continuous improvement of its production,fiber composite materials in the construction of structural reinforcement is widespread increasing among many application,and paste with FRP plate or FRP sheet,instead of pasting steel plates,began in 1980's.In 1984,the Swedish National Laboratory began experimenting with the addition of fiber composites.The focus of many researchers and professional organizations around the world is mainly on how to improve the use of FRP and other composite materials in the construction industry.FRP composites have been used as a replacement of traditional materials?concrete and steel?.FRP composites are lightweight,non-corrosive,exhibit higher specific strength and specific rigidity,are easy to construct and can be customized according to performance requirements.Because of these features,FRP composites are used in the construction and construction of reinforced concrete,deck,module construction,templates and external reinforced concrete reinforcement and seismic reinforcement of the reinforcement material.This paper compares the American Concrete Association ACI Committee 440,the Canadian ISIS Code and the China Engineering Construction Standardization Association?CECS?standard "Technical Specification for Carbon Fiber Reinforced Concrete Structures".The main differences in the specification are expressed in the following areas:?1?The ACI Code stressed before using the FRP method,feasibility analysis should be made for detailed structure to satisfy the corresponding conditions of this method can be used but did not mention before unloading and reinforcement,Chinese specification emphasized H paste structure for unloading but did not consider the analysis of consolidation of a structure?2?Comparing with the American design code,The Chinese design code lacks information for example,once the limit reinforcement ratio of compression zone in section by the concrete thickness increasing section method,now to be in the tension zone of concrete beams strengthened by FRP method,it is likely not meet the corresponding standard for the minimum reinforcement ratio requirements.?3?The Chinese specification of environmental temperature for long-term use under the condition of normal temperature limit is generally be classified as less than 60 degrees of Celsius,for extreme environment,lack of quantitative restrictions;and the working temperature limit of American standard is the result of material properties Further,and further restrictions on the working environment of FRP materials?4?With regard to the scope of application and the limit of fire resistance,the United States Code has made a quantitative analysis of the structural load,while the Chinese code does not make special restrictions on the FRP method?5?In the Canadian Code,there is good adhesion between the coagulant and the FRP and does not peel off.If the result and the assumption do not match,try another failure mode,ISIS manual includes three kinds of damage patterns: appropriate damage?balance damage?super-gluten damage and less damage.China to regulate the use of the rules to strengthen the design of the main consideration of the two kinds of damage: appropriate damage,some appropriate damage.?6?FRP material equivalent strain comparison,ISIS procedures are limited FRP tensile strain value of not more than 0.004,to ensure that the concrete at this time the effective shear?meshing effect?and reduce the deflection deformation.CECS uses only a variable ?_b,and 1.5??_b=a/h₀?3. The main content of the paper:?1?Using the American ACI Code,the Chinese CECS 146:2003 Code,the Canadian CECS Code,flexural strengths of the FRP reinforced concrete beam will be calculated by hand.For the hand calculation,the flexural strength with FRP composite and flexural strength without FRP composite will be calculated separately.?2?Using the American ACI Code,the Chinese CECS 146:2003 Code,the Canadian CECS Code,shear strengths of the FRP reinforced concrete beam will be calculated by hand.For the hand calculation,the shear strength with FRP composite and flexural strength without FRP composite will be calculated separately.?3?The results of with FRP composite and without FRP composite will be compared.?4?For verification,ANSYS 14 Finite Element Analysis?FEA?was used to model the concrete beam under given problem statement.For simplicity,the steel reinforcement bars were neglected for simplicity;the concrete beam strengthened with both FRP and CFRP were analyzed for their non-linear behavior under uniformly distributed load using finite element analysis.Displacements and stresses in FRP and CFRP were computed,as well as the displacements and stresses in concrete beam.?5?The CFRP strengthened concrete beam has been simulated by ANSYS software.From the analytical results obtained from ANSYS Finite Element Analysis software,the flexural strength and shear strength from ANSYS are compared with the hand calculation results.To highlight analytical and theoretical design guidelines on the shear contribution as well as the flexural contribution of the Fiber Reinforced Polymer to Reinforced Concrete beams.The aim of this literature is to specify which design method is safer and more reliable comparing with ANSYS Finite Element Analysis program.