Static structures (e.g. – buildings) – Means compensating earth-transmitted force – Relative motion means between a structure and its foundation
Patent
1992-12-01
1993-08-10
Friedman:, Carl
Static structures (e.g., buildings)
Means compensating earth-transmitted force
Relative motion means between a structure and its foundation
E07D 2734
Patent
active
052338002
ABSTRACT:
The present invention relates to an earthquake-proofing device wherein a superstructure is placed and supported for horizontal movement on a foundation structure so as to increase the natural vibration period of the superstructure, thereby protecting the superstructure against earthquake energy and traffic vibration. More particularly, the outer periphery of an elastic body, visco-elastic body or viscous body which hardly exhibits rigidity by itself is surrounded by a restrainer which restrains it from bulging outward, thereby enabling the body to develop high vertical rigidity while allowing it to retain horizontal deformability, the body being used as a load carrier. The restrainer and/or load carrier absorbs vibration energy by frictional damping action. According to this construction, besides the above-described basic performance essential to earthquake-proofing devices, there are the following advantages: (1) The points of action of the restoring force and damping force coincide with each other, so that the structure is protected against unnecessary torsional vibration; (2) the range of selection of materials for the load carrier is wide, so that characteristics can be designed in a wide range as desired; and (3). The initial shear rigidity at the start of vibration is so low that the structure can also be protected against slight vibration.
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Miyamoto Yoshiaki
Sakuraoka Makoto
Sasaki Teruo
Friedman: Carl
Smith Creighton
Sumitomo Gomu Kogyo Kabushiki Kaisha
Sumitomo Kensetsu Kabushiki Kaisha
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