Numerical Investigations of the Seismic Performance of Precast Buildings equipped with Friction Devices

摘要

The aim of this study is to improve the seismic behavior of precast concrete framernstructures by using supplemental passive energy dissipation. The deformationrnbetween the beam and column members of precast frames allows for therndevelopment of innovative energy dissipation systems. This paper investigates arnnew type of friction damper that can be used externally at selected beam-to-columnrnjoints of a frame to dissipate energy during an earthquake. A simplified modelrndescribing the hysteretic behaviour of the friction device was developed andrnparametric analyses were carried out in order to establish the optimum value of thernslip force of the device for the different precast structures. Nonlinear dynamicrnanalyses were conducted to evaluate the effects of the friction devices on the seismicrnbehaviour of precast structures. The installation of the devices resulted in significantrnreductions of displacements at the top of the structures and damage accumulation inrnthe structural elements.