Seismic Strength and Stiffness for Recycled Aggregate Concrete-Filled Steel Tube Frame

Figure 2

Loading device areas. 1: reaction wall of reinforced concrete; 2: steel column of vertical reaction; 3: reaction steel beam, connected with reaction steel column by high-strength bolt; 4: electrohydraulic servo actuator; 5: hydraulic jacks; 6: specimen; 7: pressure beam of steel structure; 8: roller device.