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Completed Projects

Intuitive Eco-Simulator for Planning Roads with Minimized Environmental Costs (NRF-2010-0014365)

Principal Investigator: Hyoungkwan Kim

with the support of Korea Research Foundation

2010.5~2013.4

The main objective of this study is to develop a system to choose the optimized rode routes with minimized economic, environmental loads and costs. The proposed system is to be used in the early planning stage where the level of project definition is low. In particular, augmented reality technology is used to create the user-friendly visualization interface for intuitive and collaborative road planning process.

This study has two main components: development of models for predicting economic, environmental loads and costs during the life cycle of road construction, and development of an intuitive, interactive platform where the models are implemented in the augmented reality environment. The three main engines of the proposed system are: 1) a model for predicting the life cycle environmental cost, 2) a model for predicting the life cycle economic cost, and 3) an augmented reality-based interactive simulator.1) A prediction model is developed to incorporate the paradigm change caused by greenhouse gas emission trade into the rode routes selection process. 2) A model is developed to predict the life cycle cost of road construction considering the high variabilities of regional characteristics. Statistically valid costs are extracted using quantitative methodologies such as an outlier mining algorithm.3) Based on the models developed in the above approaches, an intuitive eco-simulator is developed to maximize the communication efficiency among project participants. The eco-simulator consists of a 3D model authoring tool, a simulator for alternative road routes, and an intuitive visualization interface.

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저탄소 도로노선 선정을 위한 실감형 시뮬레이터 개발

본 연구는 건설사업의 환경 부하 및 비용(Environmental Loads and Costs)을 노선대안 평가기준에 포함하고, 환경적·경제적 관점에서 최적 노선선정을 위한 의사결정을 지원하는 시스템 개발을 목적으로 한다. 특히, 가용정보의 수준이 낮은 계획단계에 적합한 시스템을 개발하고자 하며, 증강현실 기반의 실감형 시각화 인터페이스를 활용함으로써 설계업무에 대해 이해가 낮은 사용자도 노선선정을 직접 수행할 수 있고, 여러 사용자가 협력적으로 활용할 수 있는 사용자 친화적 시스템을 지향한다.

본 연구는 도로의 생애주기 동안 발생하게 되는 환경적 부하 및 경제적 비용을 예측하는 모형 개발과, 이러한 모형을 증강현실 환경 안에서 구현하는 연구내용을 두 축으로 가지고 있다. 이러한 내용을 바탕으로 개발될 시스템은 핵심적인 엔진으로: 1) 도로의 생애주기 환경부하량 예측모형; 2) 도로의 생애주기비용 예측모형; 3) 증강현실 기반의 시뮬레이터 등을 포함한다.1) 범지구적 쟁점이 되고 있는 탄소배출권으로 인한 경제적 패러다임 변화를 도로 노선 선정과정에도 반영시키기 위하여, 도로 생애주기 동안 배출되는 온실가스의 양을 예측하는 환경 부하 예측모형을 BIM(Building Information Modelling)과 데이터 마이닝 기법을 활용하여 개발한다.  2) 도로의 생애주기 동안 소요되는 비용을 예측하는 모형을 개발한다. 도로는 건설지역의 특성에 따라 공사비 편차가 매우 높으므로 이상치 추출 알고리즘을 활용해 이상치가 제거된 평균적인 수준의 데이터를 선별하고, 통계적 기법을 적용해 표준공사비를 도출한다.3) 본 연구에서는 ①과 ②의 연구를 통하여 도출된 내용을 바탕으로 사용자의 활용성을 극대화하고 다양한 참여주체들 간의 원활한 의사소통을 위하여 증강현실 기반의 시뮬레이터를 개발한다. 이 시뮬레이터의 핵심적 구성요소는 3차원 모델 저작도구, 노선대안 시뮬레이터, 실감형 인터페이스 등이다.

Interactive Modeller for Equipment Operation in Long-Span Bridge Construction (NRF-2009-0075985)

Principal Investigator: Hyoungkwan Kim

with the support of Korea Science Foundation

2009.5~2012.4

The purpose of this research is to develop equipment operation modeller for the safe and efficient construction long-span bridges and to provide the virtual interactive environment where equipment, materials, and temporary structures can be freely placed and various construction scenarios can be tested. The proposed interactive modeller can also be applied to other project types such as other civil engineering, architectural, and plant constructions for improved safety and productivity analyses.

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장대교량 시공을 위한 실감형 장비운영 시나리오 모델러

본 연구의 목표는 장대교량의 안전하고 효율적인 시공을 위한 장비운영 시나리오 모델러(Modeller) 개발하고 사용자가 장비, 부재, 가설구조물 등 필요한 건설 자원들을 가상세계에서 배치하며 다양한 운영시나리오를 실감할 수 있는 환경을 제공하는 것이다. 이를 통하여 장대교량의 시공단계에서 필요한 장비와 가설구조물 그리고 건설자재의 합리적인 배치 등을 통하여 생산성, 시공성, 안전성을 획기적으로 개선할 수 있을 것으로 기대되며 실감형 모델러에서 개발되는 기술은 장대교량뿐만 아니라 다른 대형 토목, 건축, 플랜트 공사의 시공성, 생산성, 안전성 분석에 활용 가능 할 것이다.

Mega Project Management for Urban Regeneration (3-4-4)

Principal Investigator: Hyoungkwan Kim

with the support of Korea Ministry of Construction and Transportation

2009.10~2011.4

Urban regeneration projects are getting bigger and more complex. It is essential to look at the means available, in order to improve the efficiency and effectiveness of the mega projects in urban regeneration. This research aims to develop an integrated system for mega project management in urban regeneration. Important risk factors are identified and their related data are obtained to develop an intelligent system where such advanced database techniques as data warehousing and mining are effectively used. The proposed system enables project managers to analyze on-going urban mega construction projects from various perspectives on a wide range of scales, so that appropriate solutions can promptly be obtained. This will lead to the optimized management practices for the successful cost, time, quality, and safety performance of mega projects. 

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메가프로젝트 종합 사업 성과관리 효율화 및 최적화

메가프로젝트란 일반적으로 1조원이 넘는 초대형 건설공사로 정의되며, 최근 활발히 벌어지고 있는 용산개발, 세운상가 재개발 등의 도시재생사업에서 흔히 찾아볼 수 있다. 이러한 대규모 사업의 성공적인 수행을 위하여는 기획, 설계, 시공, 유지관리로 이어지는 전 생애주기단계에서 합리적인 의사결정이 내려져야 하는데, 이의 전제조건은 현재 벌어지고 있는 상황의 정확한 성과측정이다. 즉, 현재 진행되고 있는 프로젝트의 품질, 공기, 공사비, 만족도, 지속가능성 등의 다양한 성과가 정량적으로 측정되어야 이를 바탕으로 필요한 경영조치를 적시에 취할 수 있고, 이는 또 향상된 건설성과로 이어진다. 본 연구는 도시재생 메가프로젝트의 성공적인 수행을 위하여 종합적인 성과관리 효율화 및 최적화 기술을 개발하고자 한다.  
 

4D Cable-stayed Bridge Modeling Using Advanced Sensor Technologies (KRF-331-2008-1-D00611)

Principal Investigator: Hyoungkwan Kim

with the support of Korea Research Foundation

2008.7~2010.6

Develop a cable-stayed bridge construction monitoring system using RFID. Flash Ladar, and Image Processing. The methodologies developed in this research will enable minimization of the change order caused by inaccurate construction design and planning of cable-stayed bridge. This research, also, allows for the prediction of potential technical risks, which will lead to improved safety and disaster management.

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첨단센서기술을 활용한 사장교 사차원 모델링

본 연구는, 사장교의 안전하고 효율적인 건설을 위한 첨단 센서기반의 사장교 모니터링 시스템을 개발하는 것을 목표로 한다. 즉, 컴퓨터상의 가상현실 모델에 불과한 4D CAD가, 시공이 시작된 이후에도 그 효용을 다할 수 있도록, 다양한 건설현장의 동적인 조건(건설진척율, 장비와 자재의 이동상황 등)을 파악하는 기술체계를 개발하는 것이 본 연구의 주요 목표라고 할 수 있다. 궁극적으로는, 현장에서 수집된 정보들이 기존의 4D CAD로 반영이 되어, 관리자가 적시에 필요한 자원들을 가장 최적화된 방식으로 운영할 수 있도록 도와주는 의사결정시스템이 개발된다.

Virtual Bridge Construction

Principal Investigator: Moon-Kyum Kim, Hyoungkwan Kim

with the support of Daelim Industrial Company Limited, Korea

2008.1~2009.12

The practical benefit of so-called 4D CAD has been increasingly recognized in the area of general building construction. Its potential and limitations are understood, and it helps people strategize how to make the best use of computer graphical model for building construction. However, the real value of computer graphical model in civil construction projects has not yet been substantiated. This research aims to assess the technical and economic feasibility of the concept of virtual construction applied to bridge projects. Graphical simulation is combined with process simulation to graphically show the most optimized construction simulation results. This research is expected to initiate the paradigm shift where construction related risks are premeasured and addressed for the significant improvement of construction process.

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가상 교량건설

교량과 같은 대규모의 선형적인 토목공사는 공정이 정형화 되어 있지 않고, 동일한 구조물이라고 하더라도 지반조건, 시공방법에 따라 그 일정이 상이하기 때문에 공기지연의 원인 및 지연책임들을 쉽게 파악하기 어렵다. 이러한 문제들은 거시적인 프로젝트 관리의 미흡에서 발생하며 각 공사 주체들 간의 미흡한 의사소통에서도 기인한다. 체계적인 프로젝트 관리 및 원활한 의사소통을 위하여 구조물의 설계 및 현장조건, 원자재 조달 등의 정보를 기반으로 한 통합 정보시스템의 구축이 절실하며 시공 과정 시뮬레이션을 통한 최적 사업관리전략 구축이 이루어져야 한다. 이러한 프로세스 시뮬레이션 모듈을 통하여 시공 중 발생할 수 있는 공기 지연 인자를 파악하여 방지하고, 공기에 따른 3차원 정보를 통하여 공사 주체들에게 설계 도면을 초월한 총체적인 프로젝트의 진행 프로세스를 설명하여 시공과정에 대한 이해도를 높이고자 한다.

Concrete Maturity for Industrial Construction Projects

Principal Investigator: Hyoungkwan Kim

with the support of FIATECH, USA

The objective of this study is to assess the reliability and potential benefits of using the concrete maturity method in cold weather.  This research reviews the concrete maturity method, describes the technology, field observations, and discusses potential benefits of using concrete maturity in cold climates.  The concrete maturity method is based on the idea that concrete strength development is strongly correlated with the curing temperature history. Modern sensor and processing devices (loggers) are able to measure and record the temperature of concrete over time. This information could be used to predict concrete strength over time. Findings from a case study in application of the maturity method in an industrial construction project in Edmonton, Alberta indicated a significant potential time and cost reduction. The study also indicated that the concrete maturity methodology enables reliable quality control through the accurate estimation of in-place concrete strength. The real time information available through the concrete maturity method allowed the project manager to be proactive in managing heating and protection to ensure that the proper level of concrete strength was developed. 

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Construction Operation Simulation and Visualization

Principal Investigator: Hyoungkwan Kim, Mohamed Al-Hussein

with the support of Canadian NSERC/Alberta Construction Industry Research Chair

Most high-rise building construction projects rely on tower cranes to perform lifting and hoisting activities. In practice, tower cranes are managed based on demand, urgency, and prioritized work tasks that must be performed within a set period of time in the field. As a computer tool, simulation has proved to be effective in modeling complex construction operations and can be a substantial help in aiding practitioners in construction planning. However, the use of simulation has fallen far below its maximum potential due to a lack of appropriate support tools which would allow construction managers to use simulation tools for themselves. Special purpose simulation (SPS) and 3D visualization of simulated operations are two potential means that enable domain experts, who are knowledgeable in give domains, but not familiar with simulation, to easily model an operation within their domain and analyze the simulation results. This research aimed to develop a practical methodology for integrating 3D visualization with SPS for tower crane operation. An integrated system was built in a 3D Studio MAX environment and tested in the construction of the new civil and environmental engineering building at the University of Alberta. This study demonstrated that 3D visualization is helpful in the verification and validation of simulation results, and can effectively communicate the essence of a simulated operation, thus improving the accessibility of simulation as a decision making aid.

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Construction Risk Management Program Development

Principal Investigator: Hyoungkwan Kim

with the support of Korea Engineering and Consulting Association

Unanticipated market conditions as well as project-related risks can easily lead to cost overruns in international construction projects. For a contractor to be financially successful in international projects, a careful examination of the project is prerequisite to understand the cost variance characteristics. Based on the reasonably accurate characterization of the cost performance, the markup or contingency amount is determined to ensure both a decent level of profit and a good chance of winning the contract. This research aimed to develop an educational program for construction management practicioners. Special emphasis was placed upon on architect/engineers for their hands-on experience of risk management in international construction projects. 

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Construction Technology Roadmap Development

Principal Investigator: Moon Kyum Kim, Seung H. Han, Hyoungkwan Kim

with the support of Korea Ministry of Construction and Transportation

We see the rapidly increasing trend of traditional construction technologies being merged with other advanced technologies, such as information, bio-, and nanotechnologies. A consensus has already been formed that one of the most effective research strategies is to break down the walls between divisions and departments, so that people with different expertise can come together to cooperate. Simply put, to meet the new challenges that our society will bring, civil engineers have to learn, use, and research what is being studied and developed outside of the traditional realm of civil engineering. In September, 2005, the Center for Technology Fusion (C4TF) was established, to promote multidisciplinary research for the significant advancement of construction industry practices. Technology fusion means truly significant interdisciplinary research. One of the main goals of C4TF is to develop research programs that can improve the productivity and safety performances of construction projects throughout their entire life cycle.  After almost two years, we have identified 30 research programs as the most important objectives of C4TF. We certainly hope that C4TF’s comprehensive technology roadmap will be executed as planned and acknowledge the great contributions of many experts all around the world to its development.

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첨단융합건설연구단

Decision Support for Construction Equipment Management

Principal Investigator: Hyoungkwan Kim

with the support of Canadian NSERC/Alberta Construction Industry Research Chair

Equipment logistics, maintenance, and repair are important aspects of construction equipment management. A well-managed equipment fleet helps reduce downtime, as well as total maintenance and repair costs. With the fast increase in number of equipment, large contractors tend to divert the maintenance and repair of equipment from the equipment manager to project managers. As a result, the equipment manager of the contractor shifts his/her attention from operational-level decision making to corporate-level strategic decision making regarding equipment management, which is often a challenging job with the current equipment management system. This research aimed to develop an equipment data warehouse and a prototype decision support system using this data warehouse as a backend. The proposed equipment data warehouse enabled equipment managers to visually analyze the equipment fleet data from different perspectives and at various levels. The warehouse-based decision support facilitated high level fact-based decision making regarding equipment logistics, supplies, maintenance, repair and replacement, and showed superior performance and flexibility over current equipment management systems.

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Image Processing for Project Monitoring

Principal Investigator: Hyoungkwan Kim

with the support of University of Alberta, Canada

Accurate analyses of equipment idle time are crucial for the efficient utilization of construction equipment in large construction projects. The less idle time the equipment has, the higher productivity it can achieve. However, it is not feasible for field personnel to visually observe the operation of construction equipment all day. An image processing-based methodology was developed in this research to automatically quantify the idle time of hydraulic excavators. The image color space (hue, saturation, and value), which shows significant advantages over the red, green, and blue color space in identifying and tracing hydraulic excavators, was used as the base for image segmentation and tracing algorithms. Experimental results showed that the presented methodology has a promising application potential for effective equipment management in construction projects.

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