Abstract
This paper describes an experimental research program on the friction interface characteristics for a new type of friction damper for use in seismic building applications. Two friction interface types (leaded-bronze against stainless steel and leaded-bronze against alloy cast steel) are subjected to a series of triangular and sinusoidal displacement loading waveforms. The test parameters include the loading frequency, displacement amplitude, number of cycles, and normal force applied on the friction interface. The experiments show that the dampers can provide predictable and consistent levels of energy dissipation that is largely independent of excitation displacement, frequency, and velocity for the ranges expected to occur during an earthquake. The results are used to determine the coefficient of friction for the dampers and to verify an analytical model for friction-damped precast concrete frame buildings.
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