4. Friction Damped Self-Centering Precast Concrete Frame

In this chapter, the seismic performance of self-centering precast concrete structures is discussed at the node and structure levels. A novel energy dissipator employing non-asbestos organic material which provides stable energy dissipation capacity has recently been developed for controlled ductile structures, and the effects of different loading history, loading rating and bolt torque on the energy dissipator are analyzed from quasi-static axial tests. The seismic response evaluation of self-centering prestressed concrete frames with infill walls (SCPC-IW frames) is presented, while three types of infill walls with different load capacity are selected to be installed in a bare self-centering prestressed concrete frame (SCPC Bare frame). Beam web friction devices are included in the beam-column connections to provide energy dissipation capacity. Numerical models of the SCPC frame, and the three SCPC-IW frames are established and analyzed in a finite element software, OpenSees. The nonlinear static analyses and nonlinear dynamic analyses under 44 ground motions are performed. The incremental dynamic analyses (IDAs), seismic fragility analyses, and collapse resistance capacity evaluation have also been conducted. The results show that the SCPC system has superior seismic resilience.