Test And Finite Element Analysis Of RC Short Columns Strengthened By HTRCS Under Eccentric Load

High Toughness Resin Concrete with Steel Wire Mesh(HTRCS)is a new strengthening method.This method shares good technical performance,which can adapt to various shapes of strengthening structure,and achieve traffic quick recovery using the characteristics of rapid development of resin concrete.Based on the self-developed transverse self-balanced loading system,starting from improving the bearing capacity and stiffness properties of concrete eccentrically compressed short columns,the material mechanical properties test,the static load test of the short columns and FEM are carried out around the HTRCS material and reinforcement subject.It systematically analyzes the stress mechanism and failure process of the unilateral reinforcement of the short column under eccentric load,and demonstrats the influence of the parameters on the reinforcement effect.The main research content is as follows:1.Mechanical parameters test of HTRCS substrate,including compressive strength,tensile strength,Poisson's ratio,compression elastic modulus,and tensile elastic modulus.The compressive strength,compression elastic modulus,and constitutive curve are investigated with the curing time.The corresponding results curves are fitted by using the European Concrete Design Code BS EN 1992-1-1:2004 and the Saenz model.The compressive and tensile constitutive equations of the HTRCS substrate are obtained.2.From the perspective of optimizing the vertical loading of the conventional column under eccentric load,an independent self-developed lateral self-balanced loading system is proposed,which combines the BIM information integration platform to guide the overall design of the program.The comparative analysis of test data is used to demonstrate the feasibility and optimization of the loading device.In the phase of analyzing the experimental strain data,a data processing platform is developed based on the Visual Studio environment to increase the overall efficiency of the test and provide guidance for future using of the BIM technology in the same type of test.3.Through the monotonic loading test study and results analysis of the HTRCS reinforced short column under eccentric load,the improvement of the properties of the short column by the reinforcement layer and its action mechanism are revealed.At the same time,eccentricity,the number of steel meshes in the reinforcement layer and reinforcement position are demonstrated to illustrate the effect of contrast parameters on the reinforcement effect.The test results show that HTRCS can significantly increase the cracking load and failure load of the short column and increase the stiffness of the component.4.Using ABAQUS finite element analysis program to perform nonlinear finite element analysis on the HTRCS reinforced eccentrically compressed short column.The comparison and verification between the calculation model and the experimental data is completed.And the experimental parameters are extend analyzed.The influence of the number of the reinforcement layer steel wire,eccentricity,thickness of reinforcement layer and initial load level is discussed comparing to carrying capacity.