Abstract
Because of its excellent energy dissipation capacity, friction damper has a wide application in engineering structure, while its use is restricted by constant frictional force. Piezoelectric ceramic actuator has electrochromic deformation ability, by the use of this advantage to combine piezoelectric ceramic actuator with friction damper to form piezoelectric friction damper. This paper conducts some experiments, firstly to study the force output performance, response time of ordinary piezoelectric friction damper, hysteretic behavior as well as its energy dissipation, secondly to study the performance of the Pall-typed piezoelectric friction damper which is consisted by Pall-typed frictional damper and piezoelectric ceramic actuator. The results show piezoelectric friction dampers have good force output capacity and they increase with the input voltage increases; the dampers have a quick response and a short response time; the hysteretic behaviors are stable, which almost has no relevance with loading frequency.
Highlights
A typical friction damper is a passive energy dissipation device, its dissipation effect depends on friction force and slip displacement, and friction force is proportional to the friction coefficient and the bolt clamping force [1]
1874-1495/12 test the response time and capability, output performance of the OPFD composed by PZT actuator and typical friction damper, another is to study the hysteretic behavior of the PPFD and some conclusions have been drawn
(3) If the load frequency and voltage is the same, respectively, the energy dissipation of PZT friction damper would increase with the increase of load amplitude
Summary
A typical friction damper is a passive energy dissipation device, its dissipation effect depends on friction force and slip displacement, and friction force is proportional to the friction coefficient and the bolt clamping force [1]. Under a large clamping force, small vibration will not lead to the damper to slip and dissipate energy; under a small clamping force, there will be a slip, but the total energy dissipation is not high [2, 3], which makes the friction damper to be greatly restricted in civil engineering. Under this context, smart friction damper is put forward, which uses the micro-drive characteristics of new smart materials for adjusting bolt clamping force in real-time. 1874-1495/12 test the response time and capability, output performance of the OPFD composed by PZT actuator and typical friction damper, another is to study the hysteretic behavior of the PPFD and some conclusions have been drawn
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