Dynamic shear tests of low-yield steel panel dampers for bridge bearing

Abstract

The dynamic behavior oflow-yield point steel shear panel dampers under action of high speed loading is investigated experimentally in this paper. Horizontal displacement is applied by a 25tf hydraulic actuator at the panel top under the displacement control. Three patterns of sine wave vibration having a fixed displacement amplitude of ±18mm are applied to the panel top for the three different periods ofT=O.5， 1.0 and 2.0 sec. The effects of applied displacement velocity of loading on the load-displacement hysteresis loops approximately rectangular and practically rate independent of the shear damper are examined.