• International conference on construction engineering and project management
• /
• 2013.01a
• /
• pp.553-557
• /
• 2013

Roof and exterior wall are designed and constructed in a manner that prevents the accumulation of water within the wall and roof assembly in the formal building. However, in a freeform building there is no clear distinction between exterior wall and roof. In other words, the exterior walls and roof systems of the freeform building are integrated as a surface, unlike the formal building envelope. Therefore, freeform architecture needs a systemized envelope design method to perform functions of exterior wall and roof. However, in many cases, construction methods for roof and exterior wall are applied to freeform buildings without necessary alterations, which lead to incomplete design, leakage, cracks and other problems. Freeform architecture is thus designed and constructed differently from formal buildings. In order to more easily and inexpensively actualize freeform architecture, Building Information Modeling (hereinafter referred to as BIM) has recently been applied in the construction industry. The studies and case analysis are not sufficient to identify the implications and contributions of freeform buildings in future similar projects. Therefore, this research will study design and construction methods for freeform surfaces. This study attempts to analyze the pros and cons of each method for the concrete surface frame, and then presents the panel options for envelope system of the freeform architecture.

• Korean Journal of Construction Engineering and Management
• /
• v.12 no.5
• /
• pp.23-34
• /
• 2011

Reliable progress management at construction requires integrated information of cost and schedule, and information is used as a basis for project performance measurement. However, separate handling of cost and schedule information at construction projects makes objective measurement more difficult and decreases management productivity due to additional works for breaking down bill of quantities into corresponding activities. Recently, research related to BIM addresses issues on effective progress management based on BIM with incorporation of daily progress management. Therefore, the objective of this paper is to propose information model for daily progress rate and budgeted cost of work performed by utilizing BTM-based quantity and location information.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2013.05a
• /
• pp.164-165
• /
• 2013

Currently, the process of selecting products such as construction materials and equipment in the design phase proceeds based on the reuse of products used in the previous projects or samples from design companies as well as information on the limited products provided from the website of several manufactures. In particular, it is urgently required to formulate a standard product information management system that can be utilized in the BIM-based design environment these days. In Korea, domestic construction information classification system was developed, but its utilization has been underestimated since continuous studies on the practical usability are still lacking. Therefore, this paper derived problem of domestic construction materials information system by comparing with abroad material information system. Issues and implication is derived in terms of (1) Input information (2) Provide information, and (3) Utilize Information.

• Korean Journal of Construction Engineering and Management
• /
• v.24 no.4
• /
• pp.60-73
• /
• 2023

The need for adopting automation technologies to improve inefficiencies in interior finishing modeling work is increasing during the Building Information Modeling (BIM) design stage. As a result, the use of visual programming languages (VPL) for practical applications is growing. However, undefined or incorrect space designations in BIM models can hinder the development of automated finishing modeling processes, resulting in erroneous corrections and rework. To address this challenge, this study first developed a rule-based automated interior finishing detailing module for floors, walls, and ceilings. In addition, an automated space integrity checking module with 86.69% ACC using the Multi-Layer Perceptron (MLP) model was developed. These modules were integrated into a design automation module for interior finishing, which was then verified for practical utility. The results showed that the automation module reduced the time required for modeling and integrity checking by 97.6% compared to manual work, confirming its utility in assisting BIM model development for interior finishing works.

• Proceedings of the Computational Structural Engineering Institute Conference
• /
• 2011.04a
• /
• pp.243-246
• /
• 2011

본 논문에서는 최근에 개발되어 지하철 919공구에 적용된 BIM 기반 통합 공사관리 시스템의 구축방법과 적용성에 대해 검토하였다. 최근 대형 국책사업이 발주, 시공되면서 효율적인 공사관리를 위한 PMIS 도입이 보다 활발해지고 있는 가운데, 기존의 텍스트와 그래프 위주에서 BIM(Building Information Modeling) 기법의 하나인 4D, 5D 시스템을 이용한 다양한 시도가 되고 있다. 한편, BIM은 건설 전 생애주기에 걸쳐 활용되어야 그 도입목적을 극대화할수 있으나, 현 단계에서는 계획 및 설계단계에만 초점이 맞춰져 있어 실제 공사중에는 그 활용도가 상당히 낮은 수준이었다. BIM 기반의 통합 공사관리 시스템은 공사중, 현장과 본사를 비롯해 발주처와 감리단 등 다수의 공사 주체들이 계획, 설계시 구축된 BIM을 보다 효과적으로 사용하도록 함으로써, BIM의 공사중 활용성을 높일 뿐 아니라 유지관리 단계까지 확장하여 이용될 수 있다. 본 논문에서는 BIM 기반 통합 공사관리 시스템을 구축하기 위한 절차를 살펴보고, 최종 구축된 통합시스템의 적용성 분석후 활용방안을 제시하였다.

• Proceedings of the Computational Structural Engineering Institute Conference
• /
• 2010.04a
• /
• pp.81-84
• /
• 2010

본 연구는 Building Information Modeling(이하 BIM)의 본연의 목표인 정보의 통합 관리 및 재활용 측면에서 모델의 정보를 정확하고 체계적으로 구축될 수 있는 품질검증의 필요성을 인지하고 이를 위해 BIM 모델의 품질검증 방안에 관하여 논의하고자 한다. 이를 위해 국내외 BIM 관련 품질관리 현황을 파악하고 국내 정보시스템 구축에 관한 지침으로 한국데이터베이스 진흥 센터의 데이터 품질관리 지침을 분석하여 BIM 품질검증 방안을 도출하고자 하였다. 그 결과 BIM 모델의 품질검증 방안을 구축하기 위해 첫쩨 사전적 의미로부터 품질관리의 개념을 수립하고, 그 대상을 설정 하였으며, 둘째로 품질관리의 최종 목표인 정보의 재활용 관점에서 단계적 접근방안으로 5단계의 전략적 방향을 제시 하였다. 마지막으로 BIM 모델의 품질검증 방안을 구축하기 위해 사례 분석을 토대로 BIM 모델 관점에서 품질 검증 시기, 기준, 방법을 제시하였다.

• International conference on construction engineering and project management
• /
• 2015.10a
• /
• pp.259-262
• /
• 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.

• International conference on construction engineering and project management
• /
• 2011.02a
• /
• pp.7-11
• /
• 2011

Quantity take-off (QT) is one of the most important tasks for determining the total cost of a construction project, and it requires accuracy and reliability for the result. Accuracy and reliability in BIM-based QT are also required to assure the completeness of the result. However, there has been no basis to measure the completeness of the BIM-based QT result. As BIM is increasingly being adopted in the construction industry with a wide variety of purposes, it becomes more important to have a method to improve the completeness of BIM-based QT and criteria to measure it. This research focuses on the hypothesis that the completeness of BIM-based QT relies on the accuracy and reliability of BIM and the BIM-based QT process. As a basic research to determine the completeness of BIM-based QT, this research analyzes and derives factors that affect the completeness of BIM-based QT.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.6 no.5
• /
• pp.789-795
• /
• 2011

This paper aims to develop authoring tools and services platform that can be Immediate response through supervisor's intuitive understanding based 3d-Building Information mode about overall security situation of building by mapping many CCTV images on 3D space information from traditional observation way that make simply visualize CCTV images on the Situation Board.

• Journal of KIBIM
• /
• v.12 no.3
• /
• pp.1-17
• /
• 2022

As the technology of Smart City and Digital Twin is developing, techniques to integrate BIM data of infrastructure facilities into GIS are becoming more critical. Hence, this study aims to manage BIM data representing bridge and tunnel structures through the Industry Foundation Classes (IFC) standard and to develop a method to link these IFC-compliant files to the GIS standard CityGML without loss of information. We analyze the criteria for creating BIM data for bridges and tunnels by reviewing the BIM guidelines set by each client. We use these criteria to suggest methods for data management based on InfraBIM as a specific IFC class standard. Furthermore, we perform model analysis to determine the necessary design and construction field-appropriate model process and Level of Detail (LOD). From the model analysis, we conclude that the classified BIM models can be used as base data to generate BIM models of bridges and tunnels for facility management.