Nippon Steel Corporation

Nippon Steel & Sumikin Engineering Co., Ltd.

Hisami Hasegawa

Atsushi Watanabe

Kazuhiro Watanabe

Isao Kimura

Toru Takeuchi

Eiichiro Saeki

Koji Nishimoto

Naoya Wakita

Shunsuke Kohzuki

A sliding seismic isolation device includes an upper shoe and a lower shoe, the upper and lower shoes having sliding surfaces, and the sliding surfaces having curvatures; and a columnar steel slider disposed between the upper and lower shoes, the slider having an upper surface and a lower surface that are in contact with the upper and lower shoes, respectively, and have curvatures. A double-woven fabric layer is attached to each of the upper and lower surfaces of the slider via an adhesive layer, the double-woven fabric layer containing PTFE fibers and fibers with higher tensile strength than that of the PTFE fibers, and the PTFE fibers being arranged on sides of the sliding surfaces of the upper and lower shoes. A fluorine coat layer is disposed on a surface of the double-woven fabric layer, and a lubricating oil layer is disposed on a surface of the fluorine coat layer.

Sliding seismic isolation device

The present invention relates to a buckling restrained brace capable of absorbing vibration energy produced by an earthquake, wind power and the like, in a building and a steel structure. The buckling restrained brace of the present invention is accomplished by a buckling restrained bracewherein a steel-made center axial memberis passed through a buckling-constraining concrete memberreinforced with a steel member, and an adhesion-preventive filmis provided to the interface between the steel-made center axial member and buckling-constraining concrete, the adhesion-preventive film showing a secant modulus in the thickness direction of at least 0.1 N/mmbetween a point which shows a compressive strain of 0% and a point which shows a compressive strain of 50%, and up to 21,000 N/mmbetween a point which shows a compressive strain of 50% and a point which shows a compressive strain of 75%, and having a thickness din the plate thickness direction of the steel-made center axial member and a thickness din the plate width direction thereof from at least 0.5 to 10% of the plate thickness t and from at least 0.5 to 10% of the plate width w, respectively, and by the application of the buckling restrained brace to a damping steel structure.

Buckling restrained braces and damping steel structures

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Tokyo, Japan

Hisami Hasegawa