• 콘크리트학회논문집
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• 제28권1호
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• pp.75-84
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• 2016

이 연구의 목적은 삼각망 철근상세를 갖는 중실 철근콘크리트 기둥의 성능을 파악하는데 있다. 제안된 철근상세는 경제성과 합리성을 갖으며 공사기간의 단축을 가져올 수 있다. 삼각망 철근상세를 갖는 중실 철근콘크리트 기둥 실험체에 일정 축하중 하에서 횡방향 반복하중을 가하는 준정적 실험을 수행하였다. 사용된 프로그램은 철근콘크리트 구조물의 해석을 위한 RCAHEST이다. 사용된 해석기법은 조사된 실험체에 대하여 하중단계에 따라 성능을 비교적 정확하게 예측하였다. 그 결과 제안된 삼각망 철근상세는 기존 철근상세와 동등 이상의 소요성능을 보임을 확인하였다.

• 한국지진공학회논문집
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• 제20권1호
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• pp.33-43
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• 2016

This study investigates the performance of hollow precast segmental bridge columns with reinforcement details for material quantity reduction. The proposed triangular reinforcement details are economically feasible and rational, and facilitate shorter construction periods. The precast segmental bridge columns provides an alternative to current cast-in-place systems. We tested a model of hollow precast segmental bridge columns under a constant axial load and a quasi-static, cyclically reversed horizontal load. We used a computer program, Reinforced Concrete Analysis in Higher Evaluation System Technology (RCAHEST), for analysis of reinforced concrete structures. The used numerical method gives a realistic prediction of performance throughout the loading cycles for hollow precast segmental bridge column specimens investigated. As a result, proposed reinforcement details for material quantity reduction was equal to existing reinforcement details in terms of required performance.

• 한국공간구조학회논문집
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• 제21권2호
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• pp.33-40
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• 2021

For the practical application of U-flanged Truss Hybrid beams, the flexural capacity of hybrid beams with end reinforcement details using vertical steel plates was verified. The bending test of U-flanged Truss Hybrid beams was performed using the same top chord under the compressive force, but with the thickness of the bottom plate and the amount of tensile reinforcement. The initial stiffness and maximum load of the specimen with tensile reinforcement have a higher value than that of the specimen without tension reinforcement, but the more tensile reinforcement, the greater the load decrease after the maximum load. In the case of the specimen with tensile reinforcement, because the test result value is 76% to 88% when compared with the flexural strength according to Korea Design Code, the safety of the U-flanged Truss Hybrid beam with the same details of the specimens can't ensure. Therefore, the development of new details is required to ensure that the bottom steel plate and the tensile reinforcement can undergo sufficient tensile deformation.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2010년도 춘계 학술대회 제22권1호
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• pp.173-174
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• 2010

2009년 개정된 KBC 2009는 기존의 KBC 2005를 개정한 것으로, 특수모멘트 골조의 도입 등 새로운 내진배근상세 등이 도입되었지만, 이에 대한 검토 및 배근상세가 부족한 것으로 판단된다. 이에 본 연구에서는 KBC 2009 및 2005기준의 내진상세를 표와 그림으로 비교하여, 실무 적용시 발생될 수 있는 문제점을 개선하였다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 추계 학술발표회 논문집
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• pp.17-20
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• 2006

A flat plate-column connection is susceptible to brittle punching shear failure, which may result in the necessity of shear reinforcement. In previous, experimental tests were performed to study the capacity of slab-column connections strengthened with various shear reinforcement, and the capacity of the specimens with lattice reinforcement are superior to the others. In present study, to study for effects of details of lattice reinforcement, experimental studies was performed. Main parameters are the amount of lattice shear reinforcement, arrangement of lattice and the effect of flexural re-bar. And capacity of the specimen with small amount of lattice reinforcement was higher than the capacity of other shear reinforcement.

• 한국건축시공학회지
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• 제8권1호
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• pp.83-90
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• 2008

The reinforcing steel process is composed of the development of placing drawing, cutting and bending, and the placement and fabrication of the reinforcement, and is participated in by reinforcement detailer, the fabricator and placer. Because the reinforcing steel process-from estimating and rebar detailing, to production, material tracking, billing, and general accounting-is conducted by many participant, reinforcement details based on building code and reinforcing bar detailing standards are essential. The process, however, holds some problems. Building code has been revised recently, and the utilization of placing drawings was proved to be low, and the reinforcement estimating in early stage of the process is below what is required for placement. Therefore, in this study, a survey was conducted to the reinforcement detailer, the fabricator and placer of domestic construction industry. According to the analysis of the survey, the reinforcement details on site was not standardized. The improvement in reinforcing steel detailing standards was sought by analyzing the results of the survey including reinforcement constructability.

• 콘크리트학회논문집
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• 제28권6호
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• pp.713-722
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• 2016

이 연구는 지진하중을 받는 현장타설 및 조립식 물량저감 중공 철근콘크리트 교각의 내진성능을 파악하는데 그 목적이 있다. 개발된 물량저감 삼각망 철근상세는 경제적이고 합리적이며 공사기간을 단축할 수 있다. 정확하고 올바른 성능평가를 위하여 신뢰성 있는 비선형 유한요소해석 프로그램을 사용하였다. 이용된 해석기법은 조사된 중공 교각 실험체에 대하여 입력지진파에 따라 내진성능을 비교적 정확하게 예측하였다. 그 결과 개발된 삼각망 물량저감 철근상세는 기존 철근상세와 동등 이상의 소요성능을 보임을 확인하였다.

• 토지주택연구
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• 제3권2호
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• pp.195-202
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• 2012

이 논문은 KBC2009에서 규정하고 있는 RC 특수전단벽과 시공성 개선을 목적으로 제안된 경계요소 내 완화된 배근상세를 갖는 특수전단벽과의 비교 실험결과를 제시하고 있다. 연구목적에 따라 22층 벽식구조 아파트로부터 모델링된 최하층 벽체가 2/3크기로 축소되어 2개의 실험체가 제작되었으며, 일정축력 하에서 반복가력 실험이 실시되었다. 실험결과, 완화된 배근상세를 따르는 특수전단벽체은 KBC2009의 배근상세를 따르는 특수전단벽체와 등가점성 감쇠비를 통해 계산된 에너지소산능력 및 연성도에서는 약간의 차이를 보이고 있으나, 하중-변위 측면에서는 매우 유사한 능력을 보이는 것으로 나타났다. 또한, 현행 설계기준에서 제시하고 있는 1.5% 수준의 층간횡변위비 조건을 충분히 만족하고 있음을 확인하였다.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2007년도 정기 학술대회 논문집
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• pp.839-844
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• 2007

In order to reduce resultant stress of the connection detail of longitudinal and rib and floor beam, in this study, the parameter studies for the reinforcement details as the bulk head and the vertical rib were preformed with FE analysis. As the result, it was shown that reinforcement detail with the bulk head plate in longitudinal rig reduced generally the principal stress at the connection detail, but the stress concentration of the weld toe parts occurring fatigue crack increased. However, it was known that the reinforcement detail with the vertical rib in the rib is more effective than the bulk head plate of the reduction stress concentration in the weld toe parts.

• 대한건축학회논문집:구조계
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• 제36권2호
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• pp.137-144
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• 2020

The purpose of this study is to experimentally evaluate the effect of improving seismic performance by applying the details of seismic reinforcement to the reinforced concrete frame with non-seismic details while maintaining the original opening shape. In this study, based on CF specimens with specific seismic details, a total of four full scale specimens were designed and fabricated. The main variables are the width and spacing of steel dampers installed in the upper and lower parts of seismic reinforcement details, and the presence or absence of torsion springs installed in the hinges. As a result of the test, it was evaluated to be helpful for seismic retrofit and opening isolation of steel dampers installed at the upper and lower parts of the seismic reinforcement details and torsion springs installed at the joints. In particular, CFR2S specimens with torsion springs showed the best performance in terms of strength, stiffness and energy dissipation capacity with increasing displacement angle.