Experimental study on seismic behavior of frame-damping-frame-tube structure

In order to verify the seismic performance of frame-damping-frame-tube structural system, through the displacement reciprocating loading test of a 1: 2 scale two-story single span damping wall-reinforced concrete frame structure model, the failure characteristics, bearing capacity, ductility, stiffness degradation, bearing capacity degradation and energy dissipation capacity of the model under cyclic load were studied. The results show that with the increase of displacement, the damping walls yield firstly, then plastic hinges occur in the beams, and finally plastic hinges occur in the columns. From the results, the yield bearing capacity and peak bearing capacity of the structure are 1 012. 5 kN and 1 253. 7 kN respectively. The results indicate that the ultimate story drift is 1 / 31, the displacement ductility exceeds 4. 13, and the model exhibits stable stiffness degradation and mild bearing capacity degradation. Damping wall provides a 50% stiffness contribution to the structure before yielding and a 34% - 45% bearing capacity contribution to the structure after yielding. The limit values of story drift of frame-damping-frame-tube structure under frequent earthquake and rare earthquake can be taken as 1 / 550 and 1 / 50 respectively. © 2023 Science Press. All rights reserved.