Cross-shaped And L-shaped Section Of Reinforcement Column Experimental Research And Finite Element Analysis

On the reinforcement of concrete columns, steel reinforcement and CFRP has been received a large number of research results, but the bonded steel and CFRP reinforced composite is not more research, especially for the shaped column reinforcement, so shaped column reinforcement for the methods and theory of computation is not very mature. In order to study the composite reinforcement method of reinforced concrete columns to improve seismic performance, we conduct a cross and the L-shaped reinforced concrete columns Seismic performance.In this paper, a variety of reinforcement methods, respectively, 4 cross L-shaped columns and 7 columns for seismic retrofit, and completed more than 9 reinforced columns and 2 not reinforced (respectively, L-shaped and cross section) in the low cycle tests under cyclic loading study. Phenomenon by experiments and the hysteresis curves, skeleton curve analysis and comparison of such data, the results show that with unreinforced and a single way of strengthening and reinforcing columns compared with the carbon fiber composite bonded steel plates shaped columns reinforced the ultimate bearing capacity has been greatly improved ductility and energy dissipation are greatly improved performance. In the cross-shaped column, compared with the full package CFRP bands were more economical package.In the experiment, the theory by finite element method validation. Selected on the basis of the test for a variety of materials and material constitutive parameters, using ANSYS finite element analysis software and the L-shaped column cross section of nonlinear finite element analysis and test data by comparing the calculated load displacement curves are consistent with the test results. This indicates that the value of the next election with a reasonable numerical analysis can simulate a variety of two reinforcing pillars of force and destruction.