Discussion on the capacity of the concrete filled steel tubular compressive short column

Through the application of Mohr's criterion and the twin shear unified strength theory,the author carries out the analysis of the compressive strength of the core concrete,derives the calculation formula of the axial compression capacity,practice shows that the calculation formula provides the theoretical explanation for the capacity calculation of the concrete filled steel tubular compressive short column,and points out that the concrete filled steel tubular is widely used because its characteristics.