Structural performance evaluation of thin‐walled concrete filled steel tube column to reinforced concrete wide beam connection

This study summarized the full scale test results of the thin walled concrete filled steel tube column to reinforced concrete wide beam connection. The thin walled concrete filled steel tube column to reinforced concrete wide beam connection does not have any structural element that can reliably transfer shear forces and moments between steel column face and concrete, while in the conventional reinforced concrete system, continuity is ensured by the monolithic casting of concrete. The composite anchor is needed to effectively transfer the moment and shear force of the wide beam to the column. In order to verify the efficiency of the proposed composite anchor, nine full size specimens were fabricated and tested by applying a load downward to the upper column of the specimen upside down in order to simulate the gravity load imposed on the beam. Experimental results show that the strength of thin walled concrete filled steel tube column and reinforced concrete wide beam connections with the proposed composite anchor can exhibit superior performance than that of the conventional reinforced concrete beam to column system.