• Proceedings of the Computational Structural Engineering Institute Conference
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• 2007.04a
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• pp.763-768
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• 2007

In construction of RC buildings, the quality of shop and detail drawings is very essential for the quality and safety of buildings, Nevertheless, most of thess works are left to site workers and the requirements about bar detailing such as anchorage and splice have been done without rational design and engineering. The purpose of this research is to develop a computer aided drawing system of rebars for RC buildings. The system is based on an integrated structural design system, that is SDP. SDP manages an engineering database for structural design information. It provides all the information needed to draw rebar drawings. The drawing system consists of three modules, 1) Structural Plan Drawing System, 2) Shop Drawing System, and 3) Detail Drawing System. It is expected that not only the productivity of detail drawing works but also the quality and safety of buildings will be improved using the rebar drawing system developed in this research.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2006.04a
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• pp.508-513
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• 2006

In construction of RC buildings, the quality of shop and detail drawings is very essential for the quality and safety of buildings. Nevertheless, most of thess works are left to site workers and the requirements about bar detailing such as anchorage and splice have been done without rational design and engineering. The purpose of this research is to develop a computer-aided drawing system of rebars for RC buildings. The system is based on an integrated structural design system, that is SDP. SDP manages an engineering database for structural design information. It provides all the information needed to draw rebar drawings. The drawing system consists of three modules, 1) Structual Plan Drawing System, 2) Shop Drawing System, and 3) Detail Drawing System. It is expected that not only the productivity of detail drawing works but also the quality and safety of buildings will be improved using the rebar drawing system developed in this research.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2009.04a
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• pp.72-75
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• 2009

본 논문에서는 현재 국내에서 구축되어 있지 않은 3차원 BIM 기반 설계 및 시공 환경으로의 패러다임 전환에 대비하여 3차원 BIM 지향적 구조설계 프로그램인 SDP 제품군을 사용하여 BIM 프로그램들을 연동한 3차원 BIM 철근배근 자동생성 시스템을 개발하고자 한다. 현재 국내 건설업계의 치열한 수주경쟁으로 수익률저하/철근 등 자제가 폭등/인건비 상승/배근시공도 작성 인력 부족 및 신뢰성 저하 및 납기 지연 등의 기존 현황의 문제점 등을 SDP 제품군을 이용하여 구조설계/배근시공도 작성/정밀 골조물량 산출을 통합 지원하는 엔지니어링 컨설팅 환경을 구축하여 구조설계 시 V/E 동시 수행, 골조공사비 10% 절감, 배근시공도 및 물량산출 납기 최소로 단축, 배근시공도 정확성 향상/설계 및 시공 변경에 신속 대응, 공정 대비 발주 물량 관리 기능을 제공함으로써 고수익, 고효율, 고품질 의 엔지니어링 컨설팅 수행이 가능하다. 3차원 BIM 을 기반으로 철근현장가공에서 공장가공 전환 가속화로 국가적 물량 절감을 기대할 수 있고, 3차원 BIM 구조설계 및 골조공사 환경 구축 및 기술 자립을 통해 건설시공 분야의 기술력 향상을 기대할 수 있다.

• Journal of the Earthquake Engineering Society of Korea
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• v.23 no.1
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• pp.43-54
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• 2019

Existing reinforced concrete frame buildings designed for only gravity loads have been seismically vulnerable due to their inadequate column detailing. The seismic vulnerabilities can be mitigated by the application of a column retrofit technique, which combines high-strength near surface mounted bars with a fiber reinforced polymer wrapping system. This study presents the full-scale shaker testing of a non-ductile frame structure retrofitted using the combined retrofit system. The full-scale dynamic testing was performed to measure realistic dynamic responses and to investigate the effectiveness of the retrofit system through the comparison of the measured responses between as-built and retrofitted test frames. Experimental results demonstrated that the retrofit system reduced the dynamic responses without any significant damage on the columns because it improved flexural, shear and lap-splice resisting capacities. In addition, the retrofit system contributed to changing a damage mechanism from a soft-story mechanism (column-sidesway mechanism) to a mixed-damage mechanism, which was commonly found in reinforced concrete buildings with strong-column weak-beam system.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.27 no.4
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• pp.289-296
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• 2014

The rebar detailing is an important work influencing the final performance and quality of RC structures. But it is one of the most irrational and illogical activity in construction site. Many groups of workers, including main contractors, structural engineers, shop drawers, rebar fabricators, and etc., participate in this activity. A loosely-organized process for this activity is apt to produce a big amount of rebar loss or even degraded structures. A 3-dimensional rebar auto-placing system, called as Rebar Hub, has been designed and implemented in this research. Rebar Hub provides a totally integrated service from 3D structural modeling of buildings to rebar auto-placing considering anchorage, splice, and the length of ordered rebar. In addition, Rebar Hub can recognize the 2D drawing CAD files and then build 3D structural models which are used for the start point of 3D rebar auto-placing. After rebar auto-placing, each members of the 3D structural model have rebar information belonging to them. It means that the rebar information can be used for the afterward works such as quantity-survey, manufacturing and fabrication of rebars. Rebar Hub is showing outstanding performance while applying to practical projects. It has almost five times productivity and reduces the rebar loss up to 3~8% of the initially-surveyed amount of rebar.