Displacement-controlled earthquake-resistant transformer employing friction damper

A displacement-controlled earthquake-resistant transformer comprising:

• a device body;
• an upper frame disposed in an upper portion of the device body to fix the device body;
• a lower frame disposed in a lower portion of the device body to fix the device body;
• and
• a friction damper unit disposed between the device body and a ground surface to interwork with the device body and the ground surface, and configured to buffer a vibration transmitted from the ground surface to the device body,
• wherein the friction damper unit includes:
• a damper base disposed on the ground surface;
• a support frame connected to a side portion of the upper frame;
• a first damper bar fixed to an upper portion of the damper base by a damper bracket;
• and
• a second damper bar having a lower portion connected to the first damper bar and an upper portion connected to the support frame,
• wherein the damper base is configured to support a lower end portion of the lower frame and disposed on the ground surface,
• wherein the support frame is connected to both side portions of the upper frame,
• wherein the friction damper unit further includes a friction pad disposed between the first damper bar and the second damper bar and making frictional contact with the first damper bar and the second damper bar to buffer the vibration, and
• wherein the friction pad includes a material having high elasticity or high ductility as compared with a material of each of the first and second damper bars.