The Energy Dissipation Performance of Displacement Dependent Semi-Active Hydraulic Damper

摘要

A device using a Displacement Dependent Semi-Active Hydraulic Damper(DSHD)is developed for improvement of earthquake resistant.DSHD consists of directional valves and an oil cylinder as an open-close and semi-active damper to receive digital signals for adjusting resistant direction of the damper and magnifying energy dissipation of the oil cylinder.The energy-dissipating capability of DSHD is tested using shaking table.The experimental results indicate that the DSHD has significant efficiency on energy-dissipating performance.The shock absorption ratio for structural displacement and that of acceleration is greater than 0.84 and 0.56 respectively when subjected to simulated excitation of the Kobe earthquake with various peak ground accelerations.In accordance with the hysteretic loop of DSHD during the energy dissipation period,it reveals that the energy dissipation ratio of DSHD depends on vibration amplitude of the structure.DSHD still supplies more than 50% of energy dissipation ratio under lightly shaking.