Experimental Study on Column-Foundation Connection of Composite Hollow RC Column

The main reinforcements of reinforced concrete(RC) column are connected to the reinforcement of footing as column-footing connection. On the other hand, it is important to connect with inner tube to reinforce the connection of composite hollow RC column and footing, because inner tube is located at hollow section. In this paper, two connection methods of welding coupler connection method and anchor bolting method were proposed for the connection of composite hollow RC column-footing in addition to penetrated connection method proposed by previous researchers. To evaluate performance such as strength, ductility and behavior of the connections, finite element analysis and experimental tests were performed. Finally, it was found that the welding coupler connection method are suitable for the column-footing connection.