Based on rational constitutive model of steel and core concrete,load-deformation relationship curves of square steel tube filled with steel-reinforced concrete subjected to axial-compression are calculated by the ABAQUS software,and the calculated curves agree well with the experimental curves.

Through the test of Concrete-filled Rectangular Tubular (CFRT) of TD and VS by nonmetal Supersonic Flaw Detecting Apparatus, the status of gap under the exterior forces is analyzed.

K-joints with concrete-filled square steel tubular (CFST) is a new type joint and the study on structural behavior of it is still not perfect.

Study of limit values of axial compression ratio for concrete-filled square steel tubular columns;

Restoring force constitutive models of concrete-filled square steel tubular column-to-steel beam semi-rigid connections;

Though the restriction effect to core concrete of the steel tubular of concrete-filled square steel tubular is not as good as concrete-filled circular steel tubular, concrete-filled rectangular steel tubular has many advantage.

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;