• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.259-262
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• 2015

Due to the labor-intensiveness, high investment cost, long execution time, frequent change orders, and many stakeholders in a BIM project, a BIM manager is bound to face a lot of risks to make decisions in cost managing process. Since the productivity of a BIM team will affect the execution cost, this study investigates a simple method of assessing the productivity of a BIM team using the working timesheet records of the team. In this research, the productivity of a BIM team is defined as the effective working floor area (in square meters) of BIM uses per labor-time (in man-months) spent by the team. After the applicability of this method is tested by regression analysis using data from 5 real BIM projects in the construction phase, it is found that the simple productivity definition adopted in the method, although easy-to-implement, does not produce a statistically constant productivity value. More research is therefore needed in the future to devise better indicator(s) for assessing the productivity of a BIM team.

• 한국CDE학회논문집
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• 제19권3호
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• pp.263-271
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• 2014

Recent AEC industry, is introducing BIM based design process which mainly focuses on collaboration and integration. Since BIM has characteristic of utilizing several design libraries in various fields across the AEC industry, obtaining BIM libraries are essential for introducing and applying the BIM successfully. Thus, creating BIM libraries and guidelines for various fields are needed. BIM libraries can be categorized into disciplines such as architectural, structural, mechanical and electrical industries. Especially, companies in mechanical industry possesses design data for creating BIM library. Due to the fact, we standardized the property information for BIM libraries. And for BIM library production, we have developed a program which uses neutral format to convert 3D MCAD data designed by $NX^{TM}$ into $Revit^{TM}$ Family. Finally, we developed a program that merges property information to Revit Family file.

• 한국산학기술학회논문지
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• 제17권9호
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• pp.680-687
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• 2016

중소규모 설계사무소에서의 BIM(Building Information Modeling) 활용은 BIM 라이브러리 및 기술콘텐츠 등 요소 기술의 부재로 인하여 아직까지도 미흡한 실정에 놓여있다. BIM을 도입하고 활용하는 설계사무소의 기술적인 부담을 최소화하기 위해서는 BIM 라이브러리 및 기술 콘텐츠를 제공하고, 단일 BIM 정보를 다양한 용도로 공유 및 교환하는 체계가 필요하다. 왜냐하면 BIM 설계는 단순히 3D 형태로 건물의 외관만을 설계하는 것이 아니라 공사에 들어가는 물량을 산출하고, 자재 정보 등을 바탕으로 기술에 관한 설계정보 등을 제공할 수 있어야 하기 때문에 기술 콘텐츠의 마련이 필수적이라고 할 수 있다. 따라서 본 연구는 설계 업무 단계에서 BIM 데이터와 기술 콘텐츠가 연계 사용될 수 있도록 시스템 모듈 개발을 통해 BIM 기술 콘텐츠를 보급함으로써 BIM 기반 설계 업무의 효율성을 높이는 데에 목적이 있으며, 개발된 BIM 기술 콘텐츠 데이터 활용 시스템 모듈을 통하여 BIM 저변이 확대될 수 있는 근간을 마련하고자 한다.

• 한국BIM학회 논문집
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• 제6권2호
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• pp.12-18
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• 2016

The entire construction safety is significantly influenced by proper uses of temporary structures. However, in current practices, temporary structures are used without sufficient planning and analysis on their impact on safety. Consequently, problems in worker safety and loss of productivity are frequently caused related to temporary structures. This paper introduces an approach that uses Building Information Modeling (BIM) to automatically create temporary structures as part of construction plans and identifies potential safety hazards related to the temporary structures. In this study, the type of temporary structure is limited to scaffolding. Automation algorithms were developed and applied to (1) analyze daily construction site conditions (2) create required scaffolding objects, and (3) identify potential safety hazards related to scaffolding. A case study using a real-world construction project demonstrated that scaffolding objects were properly created based on user-input and potential safety hazards were successfully identified without human intervention.

• 한국BIM학회 논문집
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• 제5권3호
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• pp.19-32
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• 2015

For decades, the productivity issue has been a primary concern for the all stake-holders who participate in domestic construction industry. Especially, between a whole life cycle of building, the construction phase's productivity problem makes or break the entire project. In this respect, the general construction company, who accept the order and construct the building(so called General Contractor), should consider various strategies, such as schedule management, cost management, quality management, inner-crew management, etc., for the productivity improvement., and almost of these management methods have been studied for a long time. But, the researches and studies about the specialty contractor, who construct the building directly in construction site were not sufficiently complete yet. This research begins as an idea which tries to apply the BIM(Building Information Modeling) into the tasks of Specialty contractors for their productivity improvement. And for the effective application of construction BIM to specialty contractors, establish of the BIM project execution plan for them, not the fragmentary adoption of BIM. Therefore, in this paper, we develop the BIM project execution plan for the reinforced concrete companies who conduct the framework construction which located on CP(Critical Path) Especially, we model the "Construction BIM Use List for the RC Work", "BIM Application Master Process" and "BIM Application Detailed Process", and general contractor who use these BIM uses list and process models can manage various specialty contractors about schedule, cost, earned value, quality, safety and environment management systematically.

• 한국BIM학회 논문집
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• 제13권3호
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• pp.1-11
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• 2023

In order to use BIM as a tool for improving the productivity and quality of products in the construction industry, a BIM model must be created from the design stage first. Infrastructure structures such as bridges and tunnels are mainly created based on three-dimensional alignment in the generation of BIM models. Especially, generation of BIM models based on three-dimensional linearity has high task difficulty and algorithms for automating BIM modeling for railway infra structures have been suggested in previous studies. This study improved the BIM modeling automation algorithm of railway infrastructures and developed a system based on the algorithm so that it can be easily used by ordinary users. The system was built as an add-in system of Autodesk's Revit. As an improvement first, it is possible to arrange different libraries for each pattern, enabling various uses. In addition, it can be created models of several members with a single process and the system can automatically places structures that are added periodically, such as Rock Bolt and Fore Polling. Finally, 3D length information and volume for each pattern are automatically calculated for more accurate 3D-based volume calculation. This study contributes to increasing user accessibility by building a BIM modeling automation algorithm into a system. The system is expected to improve the efficiency of BIM modeling creation of linear-based infra structures, including railway infrastructure.

• 한국BIM학회 논문집
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• 제9권4호
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• pp.31-40
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• 2019

With Building Information Modeling(BIM) becoming the de facto standard for data sharing in the AEC industry, additional needs have increased to ensure the data integrity of BIM models themselves. Although the Industry Foundation Classes provide an open and neutral data format, its generalized schema leaves it open to data loss and misclassifications This research applied deep learning to automatically classify BIM elements and thus check the integrity of BIM-to-IFC mappings. Multi-view CNN(MVCC) and PointNet, which are two deep learning models customized to learn and classify in 3 dimensional non-euclidean spaces, were used. The analysis was restricted to classifying subtypes of architectural walls. MVCNN resulted in the highest performance, with ACC and F1 score of 0.95 and 0.94. MVCNN unitizes images from multiple perspectives of an element, and was thus able to learn the nuanced differences of wall subtypes. PointNet, on the other hand, lost many of the detailed features as it uses a sample of the point clouds and perceived only the 'skeleton' of the given walls.

• 한국멀티미디어학회논문지
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• 제18권9호
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• pp.1058-1067
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• 2015

Dweller's safety is one of the most important factors for the evaluation of building performance. The process of conventional safety design which is normally performed by the codes and designer's experiences is not enough to check the whole possibilities of unexpected accidents in the built environment. It means that the dwellers might be always exposed by the dangerous situation which should have been removed in the architectural design process. In order to solve this problem, this study intends to introduce a rule-based performance evaluation technology based on BIM(Building Information Modeling). The proposed technology focuses on the real time evaluation of dweller's safety in the ordinary life in the designed building alternatives and uses a commercial BIM tool as a design and evaluation platform.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.637-638
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• 2015

There has been growing interests in life-cycle project management in the construction industry. A lot of attention is given to Building Information Modeling (BIM) which stores and uses a variety of construction information for the life cycle of project management. However, due to the additional workload arising from BIM, its expected effects versus its input costs are still under discussion in practice. As an attempt to address this issue, one of previous studies suggested an automated linking process by developing Standard Classification Numbering System (SCNS) and Geometry Breakdown Structure (GBS) to enhance the efficiency of integration process of BIM objects, cost, and schedule. Though SCNS and GBS facilitates identifying all different dataset, making object sets and linking schedule activities still needs to be manually done without having an automated tool. In this context, the purpose of this paper is to develop and validate a fully automated integration system for 3D-objects, cost, and schedule. A prototype system for single family homes (Hanok) was developed and tested in order to verify its efficiency.

• 한국산학기술학회논문지
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• 제21권12호
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• pp.107-114
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• 2020

기계, 디자인, 중공업 분야에서 많이 사용되어오던 역설계 기법이 최근 건설 산업분야에 BIM(Building Information Modeling) 기반 역설계 기법인 Scan-to-BIM 기술로 적극적으로 도입되기 시작하였으며, 그동안 비효율적인 부분들을 개선하기 위한 알고리즘, 시스템, 장비 등의 개발이 이루어지면서 기술의 확장성이 더욱 커지고 있다. 본 연구에서는 객관적인 자료에 근거한 특허 분석을 통하여 한국, 미국, 유럽, 일본의 Scan-to-BIM 관련 기술 동향을 파악하여 한국 Scan-to-BIM 기술의 올바른 방향을 모색하고자 한다. 건설 산업기술 특허분석관련 선행 연구 분석, Scan-to-BIM 기술에 대한 이론적 고찰과 관련 선행연구 고찰, WIPSON 특허검색시스템을 사용한 한국, 미국, 유럽, 일본 네 국가의 관련 기술에 대한 공개된 특허 문헌을 검색하여 정보를 수집, 검증과정 및 유효 특허 추출이 이루어졌으며, 도출된 유효 특허 데이터를 이용하여 특허출원 연도별 동향, 국가별 동향, 그리고 국제특허분류(IPC: International Patent Classification) 코드를 통한 기술별 동향, 상위 20위 주요출원인 및 출원 주체 종류, 패밀리 특허 동향 등을 분석하였다.