Title:
BUCKLING-RESTRAINED BRACE FOR SEISMIC RETROFITTING OF STEEL FRAME STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2016/068401
Kind Code:
A1
Abstract:
The present invention relates to a brace for reinforcing a steel frame structure comprising steel columns and beams of plants, fundamental facilities such as power plants or the like, and to a buckling-restrained brace for seismic retrofitting of a steel frame structure, comprising stiffeners provided to surround a core material, formed into an H-beam, so as to reinforce a weak axis of the core material and expand a cross section of the core material, thereby improving cross-sectional performance and preventing a brace plate fixing the reinforced core material from buckling even under compression. In one preferred embodiment of the present invention, the brace for reinforcing the steel frame structure comprising the steel columns and the beams comprises: the core material configured into an H-beam having a center web and flanges vertically formed at both end portions thereof; two stiffeners of which each comprise a main body having a predetermined length and a staple-shaped cross section, coupling parts formed by bending and extending both end portions of the main body in an outward direction at right angles, and reinforcing parts formed by extending the outer end portions of the coupling parts in an outward direction at right angles, wherein the stiffeners are coupled to each other from both sides of the flanges of the core material so as to surround the longitudinal center portion of the core material; a reinforcing plate formed in a plate shape having a predetermined length and thickness, and provided between the outer surface of the flange of the core material and the inner surface of the main body of the stiffener; and the brace plate comprising a plate-shaped fixing plate coupled to the beam, a vertical plate formed vertically at the fixing plate, and a coupling plate, which is formed in a plate shape having a predetermined length and thickness, having a cut slit formed by being cut up till a predetermined distance from one longitudinal end portion thereof to the longitudinal center portion thereof, wherein the cut slit is fitted into and coupled to the upper part of the vertical plate such that the coupling plate forms a predetermined angle with the fixing plate, and two coupling plates are formed to be spaced from each other at a predetermined distance so as to form one pair such that the core material is inserted among the pair of coupling plates, and the web of the core material and the vertical plate are bolt-coupled by a gusset plate.
Inventors:
CHOI SUNG MO (KR)
Application Number:
PCT/KR2015/001967
Publication Date:
May 06, 2016
Filing Date:
February 27, 2015
Export Citation:
Assignee:
UNIV SEOUL IND COOP FOUND (KR)
International Classes:
E04B1/98; E04B1/38; E04C5/01; E04H9/02
Foreign References:
| KR20130121595A | 2013-11-06 | |||
| JPH11280294A | 1999-10-12 | |||
| KR20090030053A | 2009-03-24 | |||
| KR20100006536A | 2010-01-19 | |||
| JPH10159379A | 1998-06-16 |
Attorney, Agent or Firm:
JEONG, NAM JIN (KR)
정남진 (KR)
정남진 (KR)
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