Friction energy dissipater and ductile pier structure

The invention provides a friction energy dissipater and a ductile pier structure. The friction energy dissipater comprises an outer cylinder, a push rod, a piston, a friction sleeve and an elastic reset piece. The piston, the friction sleeve and the outer cylinder are coaxially arranged; the friction sleeve is sleeved outside the piston, the outer wall of the friction sleeve is in contact with the inner wall of the outer cylinder, and the friction sleeve and the outer cylinder can relatively slide; the push rod and the elastic reset piece are movably arranged at the two ends of the outer cylinder respectively, and the two ends of the piston bear acting force applied by the push rod and the elastic reset piece respectively to achieve overall sliding of the piston and the friction sleeve in the outer cylinder. The ductile pier structure is provided with the friction energy dissipater and comprises a bearing platform, a preset damage section and a pier section which are sequentially arranged in the height direct