Numerical investigation of the seismic behavior of self-centering post-tensioned concrete wall system with friction-based damper

The seismic design of buildings ought to be done to decrease the expenses of building repairing after an earthquake. Self-centering systems such as the post-tensioned concrete wall can provide this purpose. In this study, to evaluate the seismic behavior of the post-tensioned concrete wall with friction-based damper (FBD), the proposed system, the post-tensioned concrete wall with energy dissipator (ED) bars, and the concrete shear wall are subjected to the cyclic and nonlinear response history analyses at three, six, and ten-story buildings using OpenSees software. Based on the cyclic analysis, the total energy dissipation coefficients for the post-tensioned concrete wall with FBD in three, six, and ten-story buildings are respectively 1.37, 1.40, and 2.02 times of that obtained for the post-tensioned concrete wall with energy dissipator bars system, and are respectively 1.15, 1.05, and 1.72 times of that achieved for the concrete shear wall system. According to the results of the applied seven earthquake records, the average of the maximum drift in the concrete shear wall system is less than the other systems in the lower floors, and the average of the maximum drift in the upper floors in the post-tensioned concrete wall with FBD is less than the other systems.