Seismic performance enhancing of novel self-centering precast concrete frame using replaceable hysteretic dampers

Abstract

To break through the design criteria of “equivalent cast-in-place” for “wet connection”, a new self-centering precast concrete (SCPC) frame with replaceable hysteretic dampers is proposed to provide sufficient energy dissipation damping, vertical shear, and self-recovering capacities. This paper focuses on the seismic behaviors enhancing of the novel SCPC frame joint compared with traditional cast-in-place reinforced concrete (RC) frame joint. The working principle of the novel hybrid joint is illustrated, and seven cyclic loading tests with different test parameters were conducted on the three full-sized novel SCPC joints and one full-sized RC joint. The hysteresis behavior, skeleton curves, stiffness degradation, energy dissipation characteristics, and reinforcement strain of these test results were discussed. Performance-based design targets under the Design Basis Earthquake (DBE) and the Maximum Credible Earthquake (MCE) levels are defined, the design procedure of the novel SCPC frame has been developed. Furthermore, a novel SCPC frame located in the high-intensity area in China is designed based on the design procedure, elastoplastic dynamic analyses of the novel SCPC frame and RC frame are performed subjected to the DBE and MCE levels. The global and local responses illustrate the seismic behaviors and structural reliability of the novel hybrid SCPC frame with replaceable hysteretic dampers have been significantly enhanced.