• 한국건설관리학회논문집
• /
• 제13권3호
• /
• pp.43-55
• /
• 2012

최근 건설 산업에서 이슈가 되고 있는 BIM의 신뢰성을 판단하기 위한 방안으로 BIM 품질 검증 방안이 대두되고 있다. 그러나 현재 BIM 품질 검증은 부재간의 간섭체크, 공간 배치 등 3D Model을 검토하는 것에 국한되어 있으며, 구조, 설비, 견적과 같은 각 분야별 BIM기반 작업 결과물의 검증 방안은 부재한 실정이다. 특히 BIM기반 견적분야에서는 수량 산출의 근거인 산출식이 출력되지 않아 BIM기반 물량산출 결과물을 신뢰하지 못하는 현상이 발생하였다. BIM기반 견적 작업 결과물의 신뢰성을 향상시키기 위해 제조업에서 정의하고 있는 신뢰성 개념을 분석하고, 다년간 BIM기반 물량산출 수행 경험을 토대로 BIM기반 견적 또는 물량산출 작업의 신뢰성에 영향을 미치는 요인을 도출한 결과, 모델링 방법 및 BIM Tool의 특징에 따라 BIM기반 물량 데이터가 달라지는 것을 알 수 있었다. 따라서 본 연구에서는 BIM 기반 견적 모델링 시 모델링 방법에 따른 결과값의 분석과 IFC 파일 교환을 통해 데이터의 신뢰성을 높이는 올바른 모델링 방법 및 데이터 검증 방안을 제시하고자 한다.

• 한국CDE학회논문집
• /
• 제20권2호
• /
• pp.171-181
• /
• 2015

Building Information Modeling (BIM) provides many advantages when it is adopted in virtual design construction, to analyze constructability, etc. For this reason, advanced countries have made it mandatory to adopt BIM in public construction projects. The Korea Public Procurement Service announced that from 2016, BIM adoption will be mandatory in every construction project in Korea. Currently, however, it is not possible to fully adopt BIM in the building design process domestically because BIM-based systems have not been used broadly in Korea's building approval system (Seumter). In this research, four challenges were drawn from a focus group interview. Focusing on tackling one challenge, this paper reviewed previous research into building approval systems and the building approval systems of Singapore, the U.K. and the U.S., and identified elements of the building approval application process and presents a system to create and manage the information. The system supports the creation and management of information and 2D drawings from an IFC-based BIM model. We expect that the system will encourage designers to use BIM from the beginning of the design process and ultimately increase the efficiency of design in a BIM-based project.

• 대한화학회지
• /
• 제60권2호
• /
• pp.125-130
• /
• 2016

With the goal of developing Alzheimer’s disease therapeutics, we have designed and synthesized new triazole linked decursinol derivatives having potency inhibitory activities against cholinesterase [acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE)]. Since inhibition of cholinesterase (ChE) is still considered to be one of the most effective targets to treat AD patients, many new classes of ChE inhibitors have been synthesized. In an effort of identifying new type of cholinergic drug, decursinol derivatives 11-17 have been synthesized between decursinol and other biological interesting compounds such as lipoic acid, polyphenols, etc by using the click reaction and then evaluated their biological activities. Compound 12 (IC₅₀ = 5.89 ± 0.31 mM against BuChE) showed more effective inhibitory activity against BuChE than galantamine (IC₅₀ = 9.4 ± 2.5 mM). Decursinol derivatives can be considered a new class inhibitor for BuChE and can be applied to be a novel drug candidate to treat AD patients.

• 한국전산구조공학회논문집
• /
• 제22권2호
• /
• pp.163-172
• /
• 2009

3차원 패러매트릭 기반 솔리드모델링 방법으로 형상을 표현하고 건설산업분야에서 요구되는 다양한 정보를 처리할 수 있는 BIM기술은 2차원 도면의 자동생성, 건축요소들간의 간섭검토와 물량산출 이외에도 건물내 외 공간분석 및 관리, 구조해석 및 설계, 에너지 분석, 즉시조달, 시설물 및 재난 관리, 법규검토 등을 위한 고급 엔지니어링 업무까지 지원할 수 있게 한다. 본 논분은 이러한 IFC기반 BIM 기술을 건설분야의 각 임무에 작용하기 위하여 근원이 되는 각 건물요소의 기하형상을 추출하기 위한 연구내용을 제시하고 구현된 프로그램에 의한 적용사례를 보여준다.

• 한국CDE학회논문집
• /
• 제19권2호
• /
• pp.129-137
• /
• 2014

Due to the increase of carbon dioxide and building regulations, BIM is considered a way of low-carbon and eco-friendly building development for its many advantages. The advantages can be maximized with Open BIM since it can produce optimal results for various purposes of energy performance assessment. However there are some problems in data interoperability in the process of Open-BIM based energy performance assessment. To solve such problems, this study focuses on space boundary information interoperability between IFC of Open BIM and IDF format of Energy Plus known as the most accurate and diverse energy performance assessment. The study analyzes the analogous study then figures out the problems of IFC based energy performance analysis, and suggests the way of interoperability. Finally, the development of automation program makes this way much more effective. The study of IFC data interoperability is useful for improving the reliability of Open-BIM based energy assessment.

• Journal of Computational Design and Engineering
• /
• 제2권1호
• /
• pp.16-25
• /
• 2015

Since construction projects are large and complex, it is especially important to provide concurrent construction process to BIM models with construction automation. In particular, the schematic Quantity Take-Off (QTO) estimation on the BIM models is a strategy, which can be used to assist decision making in just minutes, because 70-80% of construction costs are determined by designers' decisions in the early design stage. This paper suggests a QTO process and a QTO prototype system within the building frame of Open BIM to improve the low reliability of estimation in the early design stage. The research consists of the following four steps: (1) analyzing Level of Detail (LOD) at the early design stage to apply to the QTO process and system, (2) BIM modeling for Open BIM based QTO, (3) checking the quality of the BIM model based on the checklist for applying to QTO and improving constructability, and (4) developing and verifying a QTO prototype system. The proposed QTO system is useful for improving the reliability of schematic estimation through decreasing risk factors and shortening time required.

• 한국CDE학회논문집
• /
• 제21권3호
• /
• pp.242-251
• /
• 2016

Around the world, BIM application has been mandated. In Korea, an announcement was made in 2016 that BIM application will be required for all public constructions ordered by the Public Procurement Service. However, BIM cannot be used for building permits as Seumter, a building permit system, doesn't support BIM, even if it was used for building design. To utilize BIM for permit application, this study introduces a method of management for BIM-used permit application information. It was done by analyzing the data entered for new building permit application in Seumter. For the analysis, the permit application information is classified as internal BIM information and external BIM information and the required information is defined. To easily create and utilize the data types at the design stage, this study introduces a method of creating and utilizing a permit template. Also, this study developed a tool for combining the area information to add up all the related information such as gross floor area and floor area ratio. This study is significant in that it analyzes the required information for new building permit application among all the permit application types in Korea.

• 한국CDE학회논문집
• /
• 제16권2호
• /
• pp.137-145
• /
• 2011

A variety of BIM libraries are required to apply BIM(Building Information Modeling) software and generate BIM data. However, enterprises are establishing their own libraries using BIM tools, the drawbacks are that these libraries are not open to other users, or they just can be used in some software packages. If IFC(Industry Foundation Classes), the standard format of open BIM, can be applied, the BIM library can be applied in all the BIM software packages. Although the enterprises can collaborate using IFC standard, it is difficult to represent all the property information of the construction materials by IFC. IFD(International Framework for Dictionaries) is used to solve these problems and add the property information of the construction materials easily. Therefore, Open RIM-based library needs to be developed using IFD. In this research, the development and application of BIM library and IFD in domestic and foreign countries were investigated and analyzed, and Open BIM-based IFD scenario was proposed for using, and finally by applying an IFD method, the IFD data was added within an IFC model. Consequently, Open BIM-based library can be extended with rich, formal, and semantic descriptions and enhance data interoperability among BIM software packages adopting Open BIM standard format, by applying the IFD.

• 한국CDE학회논문집
• /
• 제14권6호
• /
• pp.390-403
• /
• 2009

Construction industries have increasingly utilized Building information Modeling (BIM) technologies. Interoperability - the capability for BIM data to run from one computer application to another in the life cycle of a project - has become one of the principal research areas. Enhancing interoperability inevitably requires information structures that are standardized throughout the construction industries. As a candidate of the data exchange standard, Industry Foundation Classes (IFC) has been developed and several researches recently performed to measure its richness of digital data exchange. But doubts have been brought up whether IFC meets a sufficient level of interoperability since the research result revealed a number of cases of information misrepresentation and loss. This research presents the lessons learned from the interoperability tests of three widely used 3D design applications including Graphisoft's Archicad, Autodesk's Revit, and Bentley's Bentley Architecture. One building's architectural and structural design data were modeled with the three tools and exchanged through IFC respectively for interoperability test.

• 국제초고층학회논문집
• /
• 제2권2호
• /
• pp.97-104
• /
• 2013

Recently, the demand for Building Information Modeling (BIM) construction drawings and specifications has increased rapidly. Many countries have also started to implement BIM. The BIM implementation can change the design flow of buildings including high-rise buildings. Against this background, many companies are focusing on the development of BIM software. BIM involves a three-dimensional CAD program that can examine the placement of ductwork and machinery. It significantly increases the efficiency of a mechanical design through data unification using standard Industry Foundation Classes (IFC). In addition, BIM functions as a database to simplify the use of simulation technology for designing air-conditioning systems. To further develop BIM, it is important to know the expectations of mechanical engineers who will become frequent users of BIM in the future. A survey was conducted among Japanese mechanical engineers using a questionnaire to analyze the expectations of mechanical design using BIM. The results show that many respondents strongly recognize BIM as a three-dimensional CAD program. However they also expect that BIM can help the optimization of their design works and enhance design functionality by running simulations utilizing BIM.