Experimental Research And Finite Element Analysis On Behavior Of Angle Reinforced Concrete Short Column Under Axial Compression

The steel-concrete composite structure can develop the performance of concrete and steel fully depending on the interaction of two materials under load. It has many excellent characteristics such as high bear force, good anti-seismic performance, convenient construction and saving steel. Along with the swift development of the economic construction of our country and increasingly raise of high and exceed high building, long span bridge, the application of the steel-concrete composite structure is also extensive.The importance and application in practical engineering of steel-concrete composite structure prompt the development of theoretical and experimental research.At present,there is lack of outside wrapping steel research,and there is little development to corresponding theory and experiment research.Therefore,it has importantly practical value to study behavior of outside wrapping steel structure.The angle reinforce concrete column was studied by the experimental method in this paper.10 short columns are studied in the experiment whose slenderness ratio are 3.Ultimate load and failure mode were measured and observed. This paper mainly study the effect of the different section , space between slabs and the different concrete strength on the ultimate load and ductility of the ASCCs with the combination of the two materials.Based on the experimental analsis, this paper presents a finite element method model for the analysis of the ASCCs based on ANSYS. The elastic-plasticity model(MANDER) is used to describe cord concrete which is put forward by Mander and bilinear elastic-plasticity model is used to describe the steel.The load-displacement curves that calculated from the full-course analysis program are in accordance with the results of experimental.Therefor, the finite element model is proved rational.With the method, the behavior of the angle reinforced concrete short column structure under load are well shown, and the nonlinear finite element analysis plays a tremendous role in reducing the experiment work,obtaining more reliable data and expanding engineering application and so on.Relationship between decreasing coefficient of angle iron strength and confinement index is presented based on the experimental data and the finite element data in this paper,and a design method to calculate the axial load strength of the ASCC is proposed in this paper. The design method is a simple equation that can be easily used in structural engineering.