To meet the requirement of architectural image,it is necessary to build the declining column of steel tube and confined concrete.

On construction technology of concrete filled steel tubular column;

Introduction of the pattern of concrete filled steel tubular column-steel beam joint;

Embedded method of anchor bolt of concrete filled steel tubular column;

Method for calculation of skeleton curves of connections of concrete-filled steel square tubular columns with inner diaphragms;

Discussion on the types of concrete-filled steel square tubular column and steel beam joint;

Experimental research and theoretical analysis on flexural capacity of connections for concrete-filled steel square tubular columns with inner diaphragms;

Experimental study on seismic performance of vertical stiffener joints between concrete-filled square steel tubular column and steel beam;

Experimental study on load-bearing capability of connection between concrete-filled square steel tubular column and steel beam;

Tensile behavior of connection between concrete-filled square steel tubular column and steel beam;

The correctness of theory analysis is proved by the test results of 5 concrete-filled double steel tubular short column specimens subjected to axial compression load.

This paper studies the normal cross-section load-carrying capacity for the concrete-filled double steel tubular short columns subjected to axial compression load in which the inner and outer circle steel tubes are placed with the same circle center.