Anti-seismic bearing and assembly of anti-seismic bearings

Details Anti-seismic bearing and assembly of anti-seismic bearings Anti-seismic bearing and assembly of anti-seismic bearings

1987-01-27

1989-05-16

Lesmes, George F.

Stock material or miscellaneous articles

Composite

Of natural rubber

52167, 248609, 248621, 428462, 428465, 428492, 428493, 428494, 428497, 428521, E02D 2734

Patent

active

048309273

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: 3544176 (1970-12-01), Slater
patent: 4121393 (1978-10-01), Renault et al.
patent: 4527365 (1985-07-01), Yoshizawa et al.
Search report (French Patent Office) from corresponding application.

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