• Journal of KIBIM
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• v.9 no.3
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• pp.30-40
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• 2019

Extraction of fabrication documents is very important because it provides information related to tasks of fabrication and construction. Therefore, in the case of a prefabricated member such as a steel structure, it is necessary to improve the productivity of fabrication documents through 3D BIM. However, research and evidence data on direct comparison analysis of 3D BIM-based documents extraction versus 2D CAD-based documents extraction are hard to find. Thus, this study focuses on productivity analysis of 3D BIM based fabrication documents extraction. In this study, the productivity data of fabrication documents extraction for module construction of EPC project was analyzed. For the productivity analysis, a case study on the fabrication documents of Module A (1,965 sheets) and Module B (1,216 sheets) was conducted. Fabrication documents for each module include general arrangement drawing, assembly drawing, single part drawing and single plate drawing. Comparison of 2D CAD based fabrication documents extraction and 3D BIM based fabrication documents extraction, the productivity for the entire work was improved from 17 hours to 16 hours for Module A and 12 hours to 7 hours for Module B. Especially, the productivity of the assembly drawings, which occupies a large part of the fabrication documents, was improved by about 48.75% from the total time required from 281 hours to 144 hours.

• Korean Journal of Construction Engineering and Management
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• v.22 no.3
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• pp.40-51
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• 2021

MLS (Mobile Laser Scanning) which is a scanning method done by moving the LiDAR (Light Detection and Ranging) is widely employed to capture indoor PCD (Point Cloud Data) for floor plan generation in the AEC (Architecture, Engineering, and Construction) industry. The movement and rotation of LiDAR in the scanning phase cause deformation (i.e. skew) of PCD and impose a significant impact on quality of output. Thus, a de-skewing method is required to increase the accuracy of geometric representation. De-skewing methods which use position and pose information of LiDAR collected by IMU (Inertial Measurement Unit) have been mainly developed to refine the PCD. However, the existing methods have limitations on de-skewing PCD without IMU. In this study, a novel algorithm for de-skewing 2D PCD captured from MLS without IMU is presented. The algorithm de-skews PCD using scan matching between points captured from adjacent scan positions. Based on the comparison of the deskewed floor plan with the benchmark derived from TLS (Terrestrial Laser Scanning), the performance of proposed algorithm is verified by reducing the average mismatched area 49.82%. The result of this study shows that the accurate floor plan is generated by the de-skewing algorithm without IMU.

• Journal of the Korea Institute of Building Construction
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• v.14 no.5
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• pp.407-413
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• 2014

Appropriate selection of lifting equipments for a high-rise building construction project is one of the important factors to the project's success. Proper position of a tower crane on a construction site is so important to be determined by an expert or an experienced construction manager who draws working range of a tower crane and moves it over 2D(dimensional) site layout plan. 3D CAD, BIM, and virtual reality are is used for building design and construction, but it is not usual to use them for temporary facility planning or selection of a tower crane. This study proposes a suitable method to use augmented reality to select proper position of tower cranes. An augmented reality prototype is implemented by Vuforia and Unity 3D on a smart device to verify the practicability of the proposed method. The prototype application installed on a smart device shows several tower cranes on different markers in a real architectural drawing to locate the proper tower crane.

• 건축구조
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• v.18 no.6
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• pp.53-60
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• 2011

Revit Structure(이하 Revit)는 Autodesk사에서 만든 BIM Tool이다. Revit에 관한 특징은 본 회지 7.8월호에 다루었다. Revit은 현재 국내에 가장 많이 보급되어 있고 관련 서적도 많은 BIM Tool로써 BIM작성, 물량산출, 도면작성 등을 수행할 수 있다. 지금까지 많은 프로젝트가 Revit으로 수행되었고 사용자도 많다. 그럼 7 8월호에 제시한 구조BIM 프로세스에 따른 간단한 설명과 Revit을 통한 BIM작성에 대해 소개하겠다. 자세한 내용은 추후에 BIM교육에서 다룰 예정이다.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2021.05a
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• pp.329-330
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• 2021

The calculation of the correct construction value in the construction should be investigated after the quantity is calculated. In order to calculate the quantity requires a lot of cost and time, and the initial accurate quantity calculation is not possible. Therefore, in the planning step in order to successfully complete the project to demonstrate the practicality of the difference between the construction cost by the construction design by presenting a method for calculate the quantity through the estimate with the construction open, floor plan, surface view, section.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2015.11a
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• pp.64-65
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• 2015

As construction projects have increased in size and height recently, lifting accounts for increasingly greater portion and tower cranes are used more frequently. At present, the selection and arrangement of tower crane are depend on the experience of experts. However, since the number of experts is fairly limited and a database for tower cranes regarding lifting capacity, operation properties, rent, etc has not been widely employed, tower cranes are often not effectively selected and arranged which can cause cost overruns and delays in the lifting work. To address such issues, this study attempts to perform a basic study for development of automatic arrangement algorithm of tower crane using drawing recognition. If relevant database is established and the algorithm suggested in this study is refined more systematically, even beginning level engineers will be able to plan tower crane arrangement in a way comparable to experienced experts.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.20 no.2
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• pp.191-197
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• 2002

Recently, with the eye-opening progress in the related field of computer, the development of high resolution digital camera enables more precise positioning in digital photogrammetry, and a lot of interest has been concentrated on its application. In this study, the algorithm and system which enable the measurement of 3D point more easily was developed by image pointing method using digital image, when the digital map of the Cultural Properties of Architectures in Modern Ages is drawn by photogrammetry. As a result, we can reduce the limitation of surveying control point, exposure condition, and construct the digital map and 3D model of architecture more efficiently.

• The Journal of Society for e-Business Studies
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• v.9 no.2
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• pp.87-108
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• 2004

The current construction industry mainly uses paper-based construction documents which are produced during the whole life cycle. The paper-based information hinders to reuse the construction information, due to the inefficiency to exchange and share the construction information between designers and constructors. To overcome these problems, construction CALS/EC (Continuous Acquisition and Life Cycle Support/Electronic Commerce) has been proposed by the government. It supports efficient reusing, sharing and exchanging the construction information using digitalized drawings and documentations. This study intends to show the future applying methodologies of using the standardized key technologies in the construction CALS/EC based on the case study of Korea and several countries.

• Korean Architects
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• no.1 s.333
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• pp.67-107
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• 1997

과거에 일부 대형 프로젝트를 중심으로 국내 설계사무소와 공동설계 형식으로 행해지던 외국설계사무소의 국내진출이 최근에 급격히 증가하고 있다. 그러나 대부분의 경우 공동설계 작업이라 하더라도 외국설계사무소가 계획설계(디자인)를 주도하고 국내사무소는 실시설계(실시도면 작성, 법규검토, 허가 등)를 맡아하는 역할분담하에 설계작업이 이루어지고 있으며, 또 이와는 다르게 여러 형태로 외국건축가가 국내설계에 참여하고 있는 실정이다. 이에 대해 일부에서는 한국건축의 현실과 정체성이 무시된 채 여러가지 모순점을 드러내고 있는 현재의 공동설계방식은 한국건축의 대외 종속화를 부추긴다는 우려의 목소리 또한 적지 않다. 이와 같은 상황에서 본지는 이번 특집을 통해 외국건축 설계사무소와의 공동설계 작업의 실상과 문제점을 진단하고 나아가 건축시장개방에 따른 공동설계의 바람직한 방향을 모색코자 한다. 다만, 이번 특집으로 시장개방에 따라 더욱 증가할 것으로 예상되는 외국 설계사무소와의 공동설계 작업에 대한 명확한 결론을 기대하기 보다는, 좀 더 정확한 핵심을 짚어내고 또한 우리가 처한 현실적ㆍ현재적 당면과제들을 풀어나가는데 있어 건축계내의 다양한 의견을 전달함으로써 국제화의 흐름속에서 한국건축문화의 바람직한 방향을 찾는 활발한 논의를 증폭시키는 계기가 되었으면 한다. 아울러 본지에서는 외국건축설계사무소와의 설계공동 작업에 대해 지속적인 관심을 가지고 2회에 걸쳐 기획특집으로 다루고자 하며 이번호에 다룬 '문제점과 개선방향'에 이어 다음호(97년3월호)에는 좀 더 핵심적인 부분을 심층적으로 다루고자 '당면과제와 바람직한 방향'이라는 주제로 좌담을 개최할 예정이다.

• Journal of The Korea Institute of Healthcare Architecture
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• v.8 no.2
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• pp.67-72
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• 2002

본 연구는 경제성장과 함께 빠르게 발전하고 있는 중국의료시설의 최근 의료 환경과 의료시설의 변화 동향을 분석한 것으로 병원의 디자인, 병동 유니트 계획, 의료자원의 지역적 불균형과 건축기준 등 다각도의 변화 동향을 사진, 도면과 함께 제시하였으며, 중국 의료시설의 문제점과 과제를 정리하였다. 중국의 의료시설은 현재 급속한 성장기에 놓여 있으며, 그 과정에서 의료자원의 대도시 집중과 병원의 대형화 현상으로 지역적 의료자원의 불균형 문제가 나타나고 있고, 환자부족으로 중소병원의 경영문제가 심각한 반면, 대규모 병원은 환자집중으로 긴 대기시간과 혼잡함 등의 문제가 나타나고 있다. 또한 대규모병원과 중소병원 간 의료자원의 과다한 중복으로 비효율성 문제가 지적되고 있어 합리적인 경제기반에 기초한 효율적인 의료시설과 건물시스템을 어떻게 개발할 것인가 하는 점이 중국 의료시설의 큰 과제중의 하나가 되고 있다.