Anti-seismic device

An anti-seismic device which comprises anti-seismic rubber bearings and dampers arranged in parallel, the anti-seismic rubber bearing being formed by laminating a plurality of rigid hard plates and soft boards having a viscoelastic property one over another, the damper being composed mainly of a vis...

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Bibliographic Details
Main Authors KOJIMA; HIROMU, SUZUKI; SHIGENOBU, YOSHIZAWA; TOSHIKAZU, FUKAHORI; YOSHIHIDE, OGINO; AKIHIKO
Format Patent
LanguageEnglish
Published 06.02.1990
Subjects
BLASTING
BUILDING
BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES
CEILINGS
ENGINEERING ELEMENTS AND UNITS
FENCING
FIXED CONSTRUCTIONS
FLOORS
GENERAL BUILDING CONSTRUCTIONS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
INSULATION OR OTHER PROTECTION OF BUILDINGS
LIGHTING
MASTS
MEANS FOR DAMPING VIBRATION
MECHANICAL ENGINEERING
ROOFS
SHOCK-ABSORBERS
SPRINGS
SWIMMING OR SPLASH BATHS OR POOLS
TENTS OR CANOPIES, IN GENERAL
THERMAL INSULATION IN GENERAL
WALLS, e.g. PARTITIONS
WEAPONS
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Summary:An anti-seismic device which comprises anti-seismic rubber bearings and dampers arranged in parallel, the anti-seismic rubber bearing being formed by laminating a plurality of rigid hard plates and soft boards having a viscoelastic property one over another, the damper being composed mainly of a viscoelastic material having the physical properties (i) and (ii) defined below. (i) the hysteresis ratio (h50) is greater than 0.3 at 50% tensile deformation at 25 DEG C. (ii) the storage modulus (E) measured dynamically at a frequency of 5 Hz, a strain of 0.01%, and a temperature of 25 DEG C. is in the range of 1</=E</=2x104 (kg/cm2).
Bibliography:Application Number: US19890337045