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이동훈,최재휘,길종일,서덕석,김선국 한국건축시공학회 2009 한국건축시공학회지 Vol.9 No.6
The construction sites of small and medium buildings have small scale groundwork and thedepth of excavationis often shallow. In this case, if the groundwork, girders, and ground slabs are built simultaneously by embeddedassisting form rather than the existing conventional method to place concrete twice using the general form, wecan expect to reduce the frame duration of the basement, resulting in cost savings. The existing embeddedassisting form is restricted from usebecause there are cost problems with materials, labor costs,and with qualitydepending on the form's type. Therefore, this study is to provide an improved suggestion of building thegroundwork, girders, and ground slabs simultaneously with Polystyrene by using the embedded assisting form. Italso will compare the technique with existing methods of construction, and will verify its usefulness by evaluatingeach method of construction. 중소규모 건축물의 시공 현장은 기초의 크기가 작고 터파기 깊이가 얕은 경우가 많다. 이런 경우 일반 거푸집을 이용하여 2회에 걸쳐 타설하는 기존의 재래식 공법보다 매립형 보조거푸집을 이용하여 기초 및 지중보와 바닥슬래브를 동시에 타설하는 공법을 사용하면 지하층 골조공기의 단축과 그에 따른 원가절감을 기대 할 수 있다. 기존의 매립형 보조거푸집은 거푸집의 종류에 따라서 자재와 인건비에 따른 원가, 품질상의 문제들이 있기 때문에 사용에 제약이 있다. 따라서 본 연구에서는 개선방안으로써 발포폴리스티렌을 매립형 보조거푸집으로 이용한 기초 및 지중보와 바닥슬래브 콘크리트 동시 타설공법을 제안하고, 기존의 공법들과 비교하며, 공법별 평가를 통하여 효용성을 검증하고자 한다.
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.