The invention belongs to the technical field of
civil engineering structure
vibration response control and
earthquake resistance and
hazard mitigation and relates to a self-resetting piezoelectric friction
damper. The self-resetting piezoelectric friction
damper comprises a left baffle, a right baffle, an auxiliary plate, an outer friction plate, a movable main plate, an inner friction plate, an annular piezoelectric
ceramic driver, a spring and an actuating rod. The
friction force between the movable main plate and the inner friction plate and the
friction force between the movable main plateand the outer friction plate are adjusted through axial extending and contracting adjustment of the annular piezoelectric
ceramic driver; self-resetting of the structure is achieved through the spring 16, and
residual deformation of the structure after the earthquake is reduced. The self-resetting piezoelectric friction
damper is simple in structure, low in manufacturing cost and convenient to
machine; the
passive control of a traditional friction damper is changed to be
adaptive control, the working
voltage of the piezoelectric
ceramic driver 8 can be adjusted in real time according to the response of the building structure, the
axial deformation amount of the piezoelectric ceramic is changed, the
positive pressure of the friction plates and the movable main plate 4 is changed, and therefore the
friction force is changed; and the damping effect is stable, and the effect of
intelligent control is achieved.