Numerical modeling of bond composite reinforcementand concrete

Abstract

Composite reinforcement is a good alternative metal reinforcement for its high tensile strength, dielectric properties, and high corrosion resistance, but the range of its application is limited due to its low modulus of deformation and adhesion to concrete. The main objective is to develop and analyze the numerical model of composite reinforcement with concrete interaction, to allow further modeling work plastikconcrete(polimercomposite) construction of transport facilities.In research, the authors conducted a series of experiments pulling with "sand" fiberglass rod from the bottom (Pull-out test) in accordance with GOST 31938-2012, who helped evaluate the limit of adhesion fiberglass reinforcement with concrete. According to the results plotted the "pull out force -slip reinforcement relatively concrete", the investigation analyzed a variety of existing models clutch metal reinforcement, but to approximate this dependence proposed piecewise linear function, which is used for the further implementation of the numerical model based on linear relationships with the ultimate rigidity. The results of numerical experiments performed on this model are in good agreement with the experimental data with enough input linear relations.

Nonlinear deformation of concrete structure elements taking into account compensation grouting and fracturing

“…However, it should be taken into account that the modulus of elasticity of polymer-composite reinforcement is much closer to concrete than to steel. A number of works note that the load-bearing capacity of the structure is primarily affected by the weak adhesion between concrete and polymer composite reinforcement [8][9][10]. However, the problem of high deformability of polymer composite reinforcement as a heterogeneous and structurally complex material remains.…”