Unbonded Post-tensioned Precast Concrete Walls With Rocking Connections: Modeling Approaches and Impact Damping

Over the past two decades, precast concrete members have been utilized in seismically resilient structures. In developing these structures, different techniques used for connecting to foundation. building construction, unbonded post-tensioning (PT) tendons can anchor a wall foundation, resulting so-called rocking system. The system develops dry connection with foundation and provides moment resistance by means of PT tendons. remain elastic when is subjected design-level ground motions preserve re-centering capability wall. Moreover, structural damage concentrated near toes be minimized proper detailing toes. Rocking systems consist Single Wall (SRW), which uses no supplemental damping, or walls damping form viscous hysteretic energy dissipating devices. addition dissipate seismic through their impacts on base, inherent hysteresis base. While investigation continues gain interest, there widely accepted modeling dynamic behavior. This paper investigates popular approaches without damping: finite element method analytical modeling. ability capture local global responses evaluated against shake table tests multiple-level intensity base motions. Next, behavior characteristics simulate impact are discussed.