Practical Investigation Of Columns Strengthened With FRP Under Little Eccentric Loading

Fiber Reinforced Polymer (Fiber Reinforced Polymer/Plastic, referred to as FRP) is a new concrete reinforcement material. Reinforcement because of its good performance, is now widely used in reinforced concrete structures, and has made a lot of scientific research, Taiwan's eccentric on the fiber composite reinforced concrete structure also in Yan Jiu situation, in practice there is no Dedaotuiguang. Therefore, bound for FRP concrete columns under eccentric compression mechanical properties of important engineering value and broad application prospects.In this paper, on the basis of pilot studies, using ANS YS finite element analysis software serial analysis of binding of the aramid fiber cloth reinforced concrete columns of small eccentric compression performance, identifies constraints fiber cloth reinforced concrete eccentric compression when the material constitutive model, cell type and finite element model, and the experimental results and finite element calculation results are compared and analyzed, finite element calculations and experimental results agree well, indicating the establishment of the finite element model is reliable and can be a better simulation of fiber cloth reinforced concrete columns of small eccentric force performance.On this basis, the papers use, respectively, a small eccentric compression FRP columns nonlinear finite element model to study the amount of reinforcement, concrete strength grade, reinforcement rate, reinforcement form, type of fiber cloth, fiber fabric tensile strength, elastic modulus fiber cloth, fiber cloth Poisson's ratio and eccentric distance 9 changes in parameters on the mechanical properties of small eccentric columns influence reached the following conclusions:With the fiber cloth layers, reinforcement ratio, AFRP tensile strength increases ultimate bearing capacity of large reinforced columns larger margin of increase, however, this growth process is not linear; With the increase of concrete strength grade, eccentric column bearing capacity will also increase accordingly; carbon fiber sheet reinforced concrete eccentric compression of the bearing capacity of column increase is better than glass fiber and aramid fibers; reinforcement rate in the same, the reinforcement spacing the smaller the margin of increase carrying capacity of the larger component, reinforced the better; bearing capacity of reinforced columns with carbon fiber sheet to improve modest the increase of elastic modulus has been increasing or decreasing; fiber cloth Poisson's ratio on the bearing capacity of reinforced columns have little effect. Finally, in determining the form of cross-section under the premise of the five kinds of compression column eccentricity, six kinds of concrete grade, five kinds of reinforcement ratio in the conduct of more than 300 kinds of situation analysis, correlation tables have been designed directly for the construction query.