• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.93-96
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• 2010

현재 국내외에서 Building Information Modeling을 적용한 여러 분야의 연구가 활발하게 진행되고 있으며, 일부 국외에서는 3D 기반의 견적을 실제 프로젝트에 반영하고 있다. 반면, 국내 건설 프로젝트에서는 여전히 2D 설계도면과 물량산출 프로그램을 이용하여 견적이 이루어지고 있다. 작업의 신속성 및 정확성을 중요시하는 국내 견적 문화에서는 3D 기반의 물량산출 방식 도입을 부정적으로 바라보는 시각이 있으나, 향후 건설 산업의 경쟁력 확보를 위해서 3D 기반 견적작업이 필요하다. 이에 국외에서 상용화된 견적 시스템을 국내 건설 프로젝트에 적용한 결과, 몇 가지 한계점이 있는 것으로 드러나 국내 견적 방식에 적합한 3D기반의 물량산출 프로그램 개발이 절실한 상황이다. 따라서 본 연구에서는 국내 건설 산업에서의 물량 산출 특성을 반영한 공법기반 견적자동화 시스템 개발 및 검증을 통해 국내 3D 기반의 견적 도입을 앞당기고자 한다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.38 no.3
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• pp.477-485
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• 2018

To control manage environmental load during construction work, it is required to ascertain an accurate quantity for materials those are using during the construction. In construction industrial nowadays, especially on design part, there are lots of mistakes occurred on quantity take-off between plan documents and actual work. That mistakes are caused by omission of design items, overcount because of interference each materials or simple calculate error. Besides, in case of a construction project, engineers are impossible to design perfectly due to a lot of invalid variable in a construction site. Thus, design errors and changes occur frequently in the process of construction work or design due to such unclear elements. And in case of LCA assessment based on 2D design, there is difficult for an engineer who is in charge to calculate the volume of materials manually using drawings and relevant specifications. This study is aimed for examining and verifying a high reliable method of evaluating environmental load which is useful in construction process through comparing LCA analysis. In addition, this study provides the method of calculating the volume of materials and LCA assessment in working on the basis of 2D design, using the specifications which is used for LCA evaluation, and possibility of utilizing the LCA assessment by introducing BIM design technic to improve the former problem through comparing and analyzing the previous method with 3D-based evaluation process.

• Korean Journal of Computational Design and Engineering
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• v.18 no.2
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• pp.93-103
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• 2013

In the situation where there should be a gap between the design environments of 2D drawing and 3D BIM modeling, it is unavoidable aspect to face confusion caused by parallel usage of both technologies unless the project delivery systems are entirely upgraded to 3D. Therefore, it is critical to make efforts to minimize this confusion. Meanwhile, detailed drawings have very important roles in the construction process because they do not only concretely express construction methods for a given design plan but also provide basis for quantity takeoff and construction cost estimation etc. This paper suggests a plan to standardize detailed information based on BIM standard framework in order to make BIM realize the information. In the short term, this plan provides improved environment where both BIM and CAD technologies can be applied and, in the long term, it provides bases for BIM to replace CAD technology.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.517-520
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• 2010

BIM 설계시 의무사항으로 포함되어 있는 원지형과 암층별 지층, 흙막이 공법 중 CIP(Cast in Place Pile)공법, 구조물 형상을 3차원 정보 모델로 생성하고, 모델을 통해 정확한 2D 도면의 생성, 각 공정간의 간섭검토, 암층별 토공량 및 흙막이의 수량을 산출하였다. 최종 설계안을 도출하기 위해 3차원 기법이 설계 초기에 도입되어 반복적인 노력과 시간을 최소화하여 많은 설계대안을 제시하도록 하였으며, 정확한 설계결과를 얻기 위해, 2D 설계와 3D 설계를 병행 수행함과 동시에 이 과정과 결과를 비교하여 3차원 모델의 효과를 검증하였다.

• Journal of the Society of Naval Architects of Korea
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• v.54 no.4
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• pp.344-351
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• 2017

CAD systems used in various manufacturing industries have been rapidly switched from 2D to 3D. 3D-based design is becoming common in the shipbuilding industries too. However, there is still a demand for 2D drawings for ship production. So, it is necessary to continually improve 2D drawings. One way to improve 2D drawings is to add production information to the drawings. To do this, it is necessary to define the relation between the geometry information and the production information. Various types of drawings, which is inevitable because each drawing has its own purpose, make it difficult to define relations. This process can be simplified if the drawing information is neutralized. XML is a standard format for defining neutral data, and is already being used in various fields. In this study, a neutral augmented drawing has been defined by neutralizing the drawing information based on XML, and implemented for the allocation of their information with high quality of readability as well.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2020.06a
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• pp.105-106
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• 2020

Recently, a method of deriving an efficient 2D floor plan has been attracting attention for remodeling of old buildings with inaccurate 2D floor plans, and thus, studies on reverse engineering of indoor Point Cloud Date(PCD) have been actively conducted. However, in the case of a indoor PCD, due to interference of indoor objects, available equipment is limited to Mobile Laser Scanner(MLS), which causes a efficiency reduction of data processing. Therefore, this study proposes an automatic derivation algorithm for 2D floor plan of indoor PCD based on pixelation. First, the scanned indoor PCD is projected on the XY coordinate plane. Second, a point distribution of each pixel in the projected PCD is derived using a pixelation. Lastly, 2 floor plan derivation based on the algorithm is performed.

• Proceedings of the KAIS Fall Conference
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• 2010.11a
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• pp.32-35
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• 2010

바람직한 도시의 건설계획을 위해 2차원 적인 도면의 활용은 한계가 있다. 지방자치단체의 도시계획심의와 민원의 처리에도 3차원 도시모델을 활용하는 추세에 있다. 현장에 가지 않고 사무실에서 업무를 처리하기 위해서는 정밀한 3차원 지형모델이 구축되어야 한다. 또한 건물의 3차원모델링도 신속하고 편리한 방법을 이용해야만 실무에 활용이 가능하다. 본 연구에서는 이를 위해 고해상 고정밀 3차원 지형모델링은 물론 스케치업을 이용한 효율적인 건물모델링방법 강구하여 실무에 적용가능성을 제시하였다.

• Proceedings of the Korea Database Society Conference
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• 1996.04a
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• pp.151-185
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• 1996

개발된 시스템의 특징 ■ 웹을 이용한 대규모 멀티미디어 데이타베이스 서비스 ■ 고품질의 방대한 데이타 서비스 $\textbullet$전문정보, 이미지, 비디오, 3D비디오와 설계도면 $\textbullet$ 8,000여건의 문화재 정보, 1,000여건의 유물정보, 2,000여건의 미술 작품과 작가정보 ■ DB 검색기능과 정보검색기능의 상호보완적인 통합 ■ 객체관계 DBMS 기술을 이용한 DB관리 ■ UniWeb을 이용한 웹과 DBMS의 연동(중략)

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1994.10a
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• pp.725-730
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• 1994

2차원 도면으로부터 3차원 입체형상으로의 재구성은 CAD/CAM에서 많이 연구되어 온 분야이다. 이 논문에서는 건축에서 쓰이는 3점 소실법을 이용하여, 자유곡선을 포함하는 하나의 투시도로부터 3차원 정보를 추출하고, 그 위상학적 관계와 loop detection 알고리즘을 통해서 면정보를 추출한다. 추출된 면정보를 입체 구조로 변환하고 연속성을 부여한다. 그리고 쉬운 사용자 인터페이스를 제공하여 사용자의 의도에 맞는 적절한 입체영상을 만들어 내고자 하였다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1995.04a
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• pp.891-895
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• 1995

This paper describes a solid modeling system based on a systematic description of techniques for analyzing and understanding on engineering drawings. Main stress is placed on clarifying the difference between the drawing understanding and the drawing recognition. The former, in which we feel major interest, is intrinsically a difficult problem because it inherent contains combinatorial search to require more than polynomial time. Actually, understanding drawings is regarded as a process to recover the information lost in projection 3-D objects to 2-D drawings. But, solid modeling by automatic understanding of the given drawings is one of the promising approach, which is described precisely in the text. Reviewing the studies performed so far, we summarize the future direction of the project and inevitable open problems left.