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콘크리트 수직시공이음 접합면의 전단강도에 대한 실험적 연구
김욱종,김영찬 한국안전학회 2004 한국안전학회지 Vol.19 No.2
In massive concrete placement, cracking problem due to hydration heat is frequently encountered. One of measure to solve this problem is to make a construction joint. However, it is cumbersome to make it by chipping the surface of joint. In this study, push-out test for 18 specimens was conducted to compare the interface shear strength of construction joints whose surfaces were prepared with three methods: chipping, rib-lath, folded rib-lath. Compared to the specimens made with conventional surface chipping, those with rib-lath showed excellent performance increasing shear resistance capacity and the role of shear key conceived by folding rib-lath played important role in enhancing shear resistance. 수화열에 의한 균열은 대규모 콘크리트 타설시 흔하게 접하는 문제이며 이에 대한 해결은 시공이음을 만드는 것이다. 일반적인 방법으로 접합면을 할석으로 처리 하나 이 작업은 번거롭고 품질의 일관성을 유지하기 쉽지 않다. 본 연구에서는 접합면을 3가지 방법으로 처리하여 접합면의 전단강도를 비교하기 위한 18개의 시험체에 대한 push-out실험을 수행하였다. 할석으로 접합면을 만든 시험체에 비해 리브라스를 이용한 시험체가 전단저항에 월등한 성능을 보여 주었으며 그리고 리브라스를 절곡하여 만든 전단키가 전단저항을 향상시키는데 큰 역할을 하였다.
반복하중을 받는 PC 전단벽체에서 수직접합부의 개발 및 내진성능평가
김욱종,오재근,강수민 한국구조물진단유지관리공학회 2012 한국구조물진단유지관리공학회 논문집 Vol.16 No.1
최근 PC 공법을 도입하려는 시도가 많이 이루어지고 있다. 그러나 PC 벽체에 대한 연구는 개발의 어려움이 있어 상대적으로 더디게 발전되어 왔다. 본 연구에서는 PC벽체의 기존의 접합부의 시공성 및 구조성능을 개선하기 위하여 수직접합부의 개선안을 개발하였고, 이에 대한 구조성능평가를 진행하였다. 제안된 PC벽체의 수직접합부 구조적인 성능을 검증하기 위하여 반복적인 횡하중 재하시험을 진행한 결과, 기존의 일체형 PC벽체와 동등이상의 내진성능을 발휘하는 것으로 나타나 향후 구조물의 주요 횡력저항요소로 충분히 적용가능할 것으로 판단된다. Recently there are many attempts to introduce PC construction method in buildings. But the study on PC structural wall has been made progress so slowly because it is very difficult to develop new items. In this study, we have developed new vertical joint on PC wall in order to upgrade constructivity and structural performance of the existing connections, then we have evaluated the seismic resistance performance. As a result of the cyclic loading tests for two specimens, proposed vertical joint on PC wall has shown that it behave the excellent structural performance in comparison to PC wall having no joint. Therefore, we think that proposed vertical joint is the system to apply buliding structure.
프리캐스트 계단을 적용한 효율적인 RC 코어의 연속화 시공방법
김욱종,김록배,이도범 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
The past manpower-dependent method in the constructional industry has raised the problem of high cos - low efficiency. Especially construction of staircase by using conventional form work and concrete placement deteriorates the quality of reinforced concrete, requires many manpower and has many difficulties of work. This study introduces COSEC system(RC _Co_re _Se_quential _C_onstruction Method by Using PC stairs) to reduce the manpower and the construction time and improve quality of structure. This is the new epoch method of installing PC stair elements after the construction of core wall contrary to the existing method of installing PC stair elements before the construction of core wall or at the same time. After reinforced concrete core wall is constructed by the system form in advance, PC landings and stairs are took in and set up between core walls standing right opposite. PC landings are connected by pinned connection with the core wall and PC stairs are simply put on PC landings on both sides. This system makes installation of PC stair elements very easy and improves the quality of stairs and core wall. This study shows the effect of practical application to construction of the building in the field.
KBC 2009 내진설계기준에 따른 증축RC건축물의 변형적합성
김욱종(Kim, Ook-Jong),강수민(Kang, Su-Min),방중석(Bang, Jung-Seok),윤장근(Yoon, Jang-Keun),이도범(Lee, Do-Bum),송동엽(Song, Dong-Yup) 한국구조물진단유지관리학회 2010 한국구조물진단학회 학술발표회논문집 Vol.2010 No.2
It is important to assure deformation compatibility of expanded RC building for safe seismic design because the seismic detail of existing building is not defined by current seismic design code. In the present study, the analytic method to calculate plastic deformation requirement of RC structural member is proposed. Deformation compatibility of expanded RC building can be assured by comparing deformation requirement calculated by the proposed method with the deformation capacity defined by FEMA 356.