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이락근(Lee Rak-Geun),서배근(Seo Bae-Keun),길종일(Kil Jong-Ill),양일승(Yang Il-Seung),김순철(Kim Soon-Chul) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
The original steel braced frame retrofit method is difficult to apply to the inner frames of buildings because of weight and size of steel brace. On the other hand, a retrofit method of steel braced frames having ductile fiber reinforced cementitious composites (DFRCCs) and steel bars at the mid span of the steel brace member is apply to the inner frames of building because steel brace frame are divided by three part. The tension force is transmitted only through the steel brace and the compression force is transmitted by the prestressed bars to the DFRCCs of the joint which connect the three brace units. Results from cyclic tests of three specimens clearly showed that specimen with original steel braces and suggested steel brace using DFRCCs and steel bars ensure better strength and stable performance than pure RC frame. Also, the proposed steel brace be shown improved construction efficiency for retrofit than original steel brace frame retrofit method.
수직하중 하에서 접합형식에 따른 구조용집성재의 휨성능에 관한 실험적 연구
안현진(An Hyun-Jin),박래영(Park Lae-Young),이정훈(Lee Jeong Hoon),공형준(Kong Hyung-Joon),길종일(Kil Jong-Il),김순철(Kim Soon-Chul),양일승(Yang IL-Seung) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
It is necessary to develop and verify a new structural system to achieve a medium rise building using wooden structure. This research deals with high-performance laminated timber-based composite members, which consist of structural laminated timber and H-beam or T shaped angle. The specimens of 5 types is as follows ; classical wooden joint with bolts and steel plate, joint inserting H section (or T shaped angle) steel into laminated timber. The results of the test show that the specimen having inserting length of 2 times of the H section steel beam height was characterized by fairly good strength and stiffness than those of the classical wooden joints. And, the hysteresis characteristics is very stable and also confirmed the high level of an energy absorption performance.