This paper gives the concept of equivalent confining force for concrete-filled steel tubular columns under compression and bending, and how to predigest steel and core concrete to ideal elasto-plastic member.

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;

Many researches have been researched about Rectangular concrete-filled tubular in and out our country, most focus on performance of rectangular concrete-filled tubular column and design methods.

Study on mechanical behavior of concrete-filled square tubular column and steel-concrete composite beam with reduced beam section joints