Seismic reinforceme bracing steel frame and seismic reinforceme method using the same

• Main Authors: OH SANG HOON, KIM YUN HYEOK, CHOI KWANG YONG, KIM YOUNG JU
• Format: Patent
• Language: English; Korean
• Published: 04.11.2022
• 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

The present invention provides a seismic reinforcement braced steel frame and a seismic reinforcement method using the same, which can enhance seismic performance by simultaneously inducing flexural deformation by a flexural dominant member and shear deformation by a shear dominant member. The braced steel frame according to an appropriate embodiment of the present invention comprises: a lower fixing member located at the bottom of the opening and installed to be fixed to a building structure; an upper fixing member located at the top of the opening, installed to be fixed to the building structure, positioned parallel to the lower fixing member; a first flexural dominant member, the top of which is joined to one end of the upper fixing member and the bottom of which is joined to one end of the lower fixing member, so as to be installed in a non-fixed state to the building structure, thereby acting in flexural deformation; a second flexural dominant member, the top of which is joined to the other end of the upper fixing member and the bottom of which is joined to the other end of the lower fixing member, so as to be installed in a non-fixed state to the building structure, thereby acting in flexural deformation; and a shear dominant member, the top of which is joined to the center of the upper fixing member and the bottom of which is connected to the lower fixing member through a bracing member. The braced member has a symmetrical structure about the central vertical axis of the opening, and is joined to the lower fixing member and the shear dominant member. The shear dominant member is wider than the first and second flexural dominant members but is shorter than the first and second flexural dominant members to induce shear deformation. 본 발명은 휨 지배부재에 의한 휨 변형과 전단 지배부재에 의한 전단 변형이 동시에 거동함으로써 내진 성능이 향상되도록 한 내진 보강용 가새 철골 프레임 및 이를 이용한 내진 보강 공법을 제공한다. 본 발명의 적절한 실시 형태에 따른 가새 철골 프레임은, 상기 개구부의 하부에 위치되어 건축 구조물에 고정되게 설치되는 하부 고정부재와; 상기 개구부의 상부에 위치되어 건축 구조물에 고정되게 설치되며 하부 고정부재와 나란하게 배치되는 상부 고정부재와; 상단이 상부 고정부재의 일단에 접합되고 하단이 하부 고정부재의 일단에 접합되어 건축 구조물에 비고정된 상태로 설치되어 휨 변형으로 거동하는 제1 휨 지배부재와; 상단이 상부 고정부재의 타단에 접합되고 하단이 하부 고정부재의 타단에 접합되어 건축 구조물에 비고정된 상태로 설치되어 휨 변형으로 거동하는 제2 휨 지배부재와; 상단이 상부 고정부재의 중앙부에 접합되고 하단이 가새부재를 매개로 하부 고정부재에 연결되는 전단 지배부재;를 포함하되, 가새부재는 개구부의 중심 수직축에 대하여 대칭적인 구조를 갖고 하부 고정부재와 전단 지배부재에 접합되고, 전단 지배부재는 그 폭과 길이가 제1,2 휨 지배부재의 폭보다 넓고 길이보다 짧게 구성되어 전단 변형으로 거동이 유도되는 것을 특징으로 한다.