The composite column with concrete filled steel tube inside can provide great advantages over either pure steel or reinforced concrete members, as a kind of composite component, it has been increasedly used over the recent years.

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;

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