Behavior of Two-way Steel Moment Connections with Side Plates and Double-I Built-up Columns under Cyclic Loading

摘要

The common method of connecting I-beam to double-I built-up column in the case of moment connections has two kinds of problems, 1) brittle fracture of full penetration groove welds of beam flanges to the column and 2) flexibility of the column cover plate that connects two I-shaped sections. To modify the connection, we have proposed a new detail. In the new geometry of connection, there is a gap between beam end and column face. The moment transfers from beam to the column by two full depth side plates. The tensile force is not directly applied to the cover plate. Therefore the problems of cover plate excessive deformations and the brittle fracture of full penetration groove welds are completely eliminated. The finite element method was used for investigating the cyclic behavior of two-way moment connections with side plates. Results show that these connections have high strength and stiffness and cause the ductile behavior of structure with formation of plastic hinges in the beams.