• 한국CDE학회논문집
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• 제19권1호
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• pp.80-90
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• 2014

In architecture projects, BIM library has widely been using for prefabrication of products and design process. However, since the shape of structures is different by each project in civil engineering projects and a shape representation system is complicated, it is not easy to develop a standardized BIM library. To solve these issues, this study develops BIM library based on standardized 2D shop drawings for civil structures. The standardized shop drawings, which are the targets of the BIM library model, should be first selected. Besides, in order to define modeling scope with the level of general and shop drawings for each structure, LOD(Level of Detail) and breakdown structure are determined, and development methods of families of 3D object type including 2D profile and rebar through commercial software are established. With these, properties of BIM library are configured, and a utilization model of the BIM libraries is constructed for 3D modeling and a simulation using the BIM library. Therefore, this study can identify properties that are necessary when IFC schema is configured for civil engineering projects. For future, it is expected that easiness of BIM design for the civil engineering projects and generation, management, and analysis system of BIM library for road projects will be secured.

• 품질경영학회지
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• 제46권3호
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• pp.379-396
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• 2018

Purpose: The purpose of this study was to propose a standard form of noise filter drawing, which is widely used in the field of weapon systems, to define the essential specification which is not standardized at the existing drawings and to employ the reference for manufacturing and qualification test. Methods: To do that, it identifies the improvements to analyze 19 noise filter drawings, studies the principle of noise filtering to find the essential part of the spec. and reviews the MIL-STD-220C and KS IEC 60939, which is the widely used as a formal spec. pertaining to the noise filter. Throughout the study, a standard form is developed to standardize the attenuation characteristics and find eight crucial metrics to specify the noise filter. Results: The results of this study are as follows; The standardized drawings can be used as the qualification test of the item and the manufacturing and engineering documents to make the noise filter, which are also applicable to the reference document to review KDS(Korea Defense Standard) drawings.

• 한국산업융합학회 논문집
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• 제23권2_2호
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• pp.225-232
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• 2020

In this paper, we introduce the results of investigating and overhauling bearing drawings in the defense field, and propose an effective bearing drawing management system. We identify the features and performance items that must be regulated in the bearing drawing. After reviewing the validity of the bearing drawings, we classify the incorrect drawings by factor. To achieve greater effect, standardized formats are needed to incorporate into the drawing in the early stage. We propose the introduction of a bearing drawing management system so that the developing bearing technology can be applied quickly to the defense sector. As other elementary parts of the machine have similar problems, we think this study will help develop improvement plans.

• 한국CDE학회논문집
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• 제21권4호
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• pp.417-425
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• 2016

Especially for resolving BIM data compatibility issue, as one of recently raised BIM technology issues, has also been improved by using open BIM, representatively using IFC (Industry Foundation Classes) format. As shown in many case studies, usefulness of BIM technology is increasing day by day, and the IFC-based open BIM technology is essential in recent AEC projects where the productive collaboration is of importance. One of current problems in actual projects is that there is a conflict between conventional ways and newly developed BIM ways. Using both conventional and new technologies leads construction workers to having more work loads, consequently the efficiency and productivity of on-site workers have been decreased. Thus, it is strongly necessary to facilitate 3D BIM models to extract and generate 2D precision drawings in automation, especially using open BIM technologies. Some native BIM authoring tools have limitations in there automatic generation of 2D drawings, and there is no standardized mechanism to generate 2D drawings from heterogeneous applications. For this reason, this paper aims to develop an automated stand-alone program to generate 2D drawings in automation using IFC file, totally independent from various BIM authoring tools. By using the application described in this paper, any type of general drawings such as plan, section and elevation can be extracted without additional efforts. The development approach described in this paper, based on the open BIM technologies, has a strong impact to the current process especially in the perspective of enhancing productivity when we need to find out a trade-off in-between conventional and new approaches.

• 한국건축시공학회지
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• 제9권2호
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• pp.39-46
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• 2009

The erection bar is defined as the assistant bar used to fix the position of the reinforcing steel as the reinforcing steel is placed on site. As the erection bar do not bear the structural load and is not showed in the structural drawings, it is not managed importantly. But as chair bars in mat footing is used in large quantities to support the upper main bars, the detailing standards need to be suggested. and some erection bar is placed by experience of the fabricator and placer. Therefore, in this study, a survey about the erection bars was conducted to the reinforcement detailer, the fabricator and placer of domestic construction industry. 11 placing drawings is analyzed to find out the problems of detailing and the quantities of the erection bars. According to the analysis of the survey, the erection bar details in placing drawings were not standardized, and some erection bars are omitted in placing drawings. The improvement in the erection bar detailing was sought by analyzing the results of the survey.

• 한국철도학회논문집
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• 제7권1호
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• pp.20-25
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• 2004

Railroad geotechnical information management system was developed by using Web GIS and DB in this study. The standardization of railroad geotechnical information is progressed by classifying three groups as like basic informations, vibration informations along railway lines and design drawings. The basic informations consisted of basic and dynamic properties of soils, geophysical exploration and seismic survey/exploration. And the specification for 'human exposure to whole-body vibration' was adopted to construct the vibration informations along railway lines. The informations as like drawings and photographs were saved by changing to graphic files in the standardization of design drawings. In the case of standardization of geographical information, the topographical maps(NGIS, 1:5000) were primarily used as digital maps. Another digital maps(KRRI, 1:5000) and their geographical DB based on NGI code system were added on this maps. The standardized informations were used to construct their database. And railroad information management system was developed using Entity-Relation(ER) model which had a good feasibility for expansion and transition to other system in designing stage of database. This system consisted of layer selection, search and analysis of geotechnical informations and Zeus DB was adopted for GIS operating and user interface. This system could be a good tool for saving, searching and analyzing the geotechnical and geophysical informations. These DB systems would offered the basic informations to plans, design and construction of railroad lines etc. in practical use.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2006년도 춘계학술발표대회 논문집
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• pp.97-98
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• 2006

This study proposes a method of generating steel house shop drawing in an automated design method, reducing construction manpower and period. With one hour fire-resistant approval code, reflecting work ability and efficiency, steel-framed house market is expected to extend from one or two story house to multi-purpose facilities up to four story height. More models have been constructed in this system than the first appearance of fire-resistant approval in Korea in 1997 Also, cost estimation of components such as frame walls, roof trusses and floors is obtained with shop drawings. Also, the lack of suppliers of steel framed house shop drawing and unstandardized drawing method get constructors have difficulty in understanding its design. In steel framed house industry, shop drawings are essential part in building and constructing framework and they have major effects on construction deadlines and expenses. By exploring method of shop drawing automation, this study aims to optimize work flow with a standardized drawing method. The proposed system can be applied to manufacturing automation in domestic industry of factory-built panelizing method in the near future.

• 한국산학기술학회논문지
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• 제17권4호
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• pp.129-137
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• 2016

국내외에서 건축시설 중심의 BIM 라이브러리를 개발하여 보급하고 있으나, 개별 라이브러리 형상에 대한 물리적, 논리적 품질검토 방법을 정의하고 있지 않아 2D로부터 변환된 3D 라이브러리 모델의 신뢰성을 확보하는데 어려움이 있다. BIM 라이브러리는 자재 및 부재 제작업체들이 참여하여 컨텐츠를 구성하므로 개별 라이브러리의 제작 후 납품시 별도의 품질검토를 통해 인증을 받는 절차가 무엇보다 중요하다. 또한 그 활용에 범용성을 가져야 하므로 일관된 검토기준에 따라 객체의 품질을 확보하는 것이 필요하다. 따라서 본 연구에서는 국토교통부 표준도를 기반으로 작성된 토목분야 BIM 라이브러리를 토대로 기존 2D와 비교하여 물리적 및 데이터 관점에서 정확한 라이브러리 객체가 작성되었는지를 확인하기 위한 품질 검토 방법을 구성한다. 본 연구는 건축 및 토목분야의 자재 및 부재 제작업체들이 BIM 라이브러리 객체 납품 시 품질 검토 방법으로 널리 활용될 수 있을 것이다. 또한 As-Built BIM 모델의 품질검토를 위한 룰-셋(Rule-Sets) 정보로 활용되어 파라미터 기반의 자동화된 품질검증 시스템 구축에 활용될 수 있을 것이다.

• 한국지리정보학회지
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• 제24권4호
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• pp.1-25
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• 2021

정부는 지하안전사고 대응 및 예방을 위해 현행 수작업 기반의 지하공간통합지도 구축 및 갱신체계를 지하구조물을 포함한 지하정보에 대해서 자동화 기반의 3D 지하정보 구축 및 갱신체계로의 전환을 위한 준공도서제출 시스템 구축사업을 진행하고 있다. 하지만 3D 지하구조물 자동화 갱신 시 필요한 표준도면 연구가 미비하여 이에 관한 구체적인 연구가 필요한 실정이다. 본 논문에서는 지하공간통합지도를 구성하는 6종 지하구조물을 대상으로 표준도 기반의 3차원 지하구조물 구축 방안을 제시하여 신속 정확한 도면데이터 작성과 체계적인 3차원 지하구조물 도면데이터 관리가 이루어질 수 있도록 하였다. 또한, 지하정보 실무에 활용 가능한 3D 구축용 가공도면 툴을 개발하여, 일반 CAD 프로그램 사용자들도 쉽게 가공도면을 제작할 수 있도록 하였다. 본 논문에서 도출된 결과물들은 향후 3D 지하구조물 구축을 위한 표준 프레임워크 및 실무적용 지침 수립 시 주요한 참조자료가 될 것으로 기대한다.

• 한국전산구조공학회논문집
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• 제30권1호
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• pp.71-76
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• 2017

BIM 설계에서 라이브러리의 구축 및 활용은 매우 중요하다. 기존 컨텐츠의 재활용이 가능하므로, 설계를 보다 효과적이고 효율적으로 진행할 수 있다. 건축분야와 달리 토목분야, 특히 철도시설분야에서는 라이브러리의 구축 및 표준화가 미진하다. 따라서 본 연구에서는 철도시설분야에 3차원 객체 라이브러리를 구축하고 표준화하고자 한다. 철도시설물 분류체계 및 관련도면을 수집 및 분석한다. 분석된 표준도면의 항목과 분류체계 항목을 매칭하였다. 각 항목별로 라이브러리가 필요한지 여부와 그럴 경우 어떤 소프트웨어가 적절한지를 검토하였다. 사용가능한 소프트웨어는 주로 Civil 3D와 Revit 등으로 나타났다. 향후 이를 바탕으로 철도인프라 3차원 라이브러리의 속성 항목 및 명세서를 설계하고 라이브러리를 구축할 예정이다.