Experimental Study on Hysteretic Behaviors of the Deep Beams Infilled Steel. Frame

This paper proposes a new type of composite deep beams infilled steel frame. An experimental study of a series of seven specimens was conducted to investigate the structural behavior and performance of deep beams infilled steel frame. One was a pure steel frame (PF), and six other were deep beams infilled steel frame, consisting of two steel plate deep beams infilled steel frame (SDBF), two reinforced concrete deep beams infilled steel frame (RDBF), and two composite deep beams infilled steel frame (CDBF) with different span-height ratio. The cyclic loading experimental results indicate that deep beams infilled steel frame significantly increased the initial stiffness, carrying capacity, ductility and energy dissipation capacity. Deep beans can be used as the first defense line to dissipate energy when an earthquake occurs, then the steel frames act as the second.