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.

For Research Chinese Export Commodities Fair Pa Zhou Pavilion Matching facility project 41-storey high-rise office building of rectangular steel pipe of concrete pillar and type steel of concrete beams of Structure node of bear strength performance,for Scale model of their test samples to obtain relevant data,through analysis to obtain some conclusions and recommendations.

Concrete Filled Rectangular and Square Steel Tubular Column (CFRC) structurehas a good ductility, plasticity, anti-earthquake, and so on.

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.