Anti-seismic bearing assembly

Details Anti-seismic bearing assembly Anti-seismic bearing assembly

1989-03-01

1990-06-12

Lesmes, George F.

Stock material or miscellaneous articles

Composite

Of natural rubber

52167, 248609, 248621, 428465, 428492, 428494, 428212, E02D 2734, B32B 2706

Patent

active

049332384

ABSTRACT:
An anti-seismic bearing made up of a plurality of rigid plates and viscoelastic flexible plates laminated alternately, said flexible plates being made of a material characterized by that the hysteresis ratio at 100% deformation at 25.degree. C. is 0.15 to 0.60, the loss tangent (tan .delta.) at 0.01% deformation, 5 Hz, at 25.degree. C. is 0.010 to 0.194, and the ratio E(-10)/E(30) is 1.0 to 3.0, where E(-10) is a storage modulus at 0.01% deformation, 5 Hz, at -10.degree. C. and E(30) is a storage modulus at 0.01% deformation, 5 Hz, at 30.degree. C. An assembly composed of low-damping anti-seismic bearings and high-damping anti-seismic bearings arranged in parallel such that the anti-seismic bearings support the vertical load and undergo elastic deformation in the horizontal direction.

REFERENCES:
patent: 3134585 (1964-05-01), Trask
patent: 4121393 (1978-10-01), Renault et al.
patent: 4593502 (1986-06-01), Buckle
patent: 4633628 (1987-01-01), Mostaghel
patent: 4761925 (1988-08-01), Fukahori et al.

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