Abstract: A vibration damping mechanism and an anti-earthquake wall material for providing a building or other structure with strength and rigidity, and a capability of damping the vibrations. On one or both sides of a base plate material (43) to be connected to a framework (50), an auxiliary plate material (44) is jointed with a space being formed. A viscoelastic body (M) is filled into the space, the base plate material (43) is selected so that it can cause elastic buckling, and by deformation and movement of the viscoelastic body (M), the vibration energy is absorbed.

Abstract: Vibration of a structure is damped using vibration damping mechanisms. Each vibration damping mechanism has a first plate rotatably mounted on a pair of first pivot shafts respectively mounted on a pair of opposed frame members of the structure, a second plate which is rotatably mounted on a pair of second pivot shafts respectively mounted on the opposed frame members at a predetermined distance from the first pivot shafts and is opposed to the first plate intervening a space therebetween, and a viscoelastic body provided in the space between the first and second plates. A plurality of vibration damping mechanisms having viscoelastic bodies different from each other in mechanical properties are mounted between the opposed frame members and a conversion coefficient .beta.