• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.929-934
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• 2005

The complex and dynamic job nature and the ever-changing working environment of construction projects inevitably present uncertainties to construction operations. Identification, evaluation and control of uncertainties constitute main elements of risk management and critical tasks of project management in construction. This paper is focused on application of a simplified discrete-event simulation approach in management of schedule-overrun risks, each being the combination of the occurrence probability of an uncertain interruptive factor and its potential consequence in terms of time delay. A case study observed from a concreting operation in Hong Kong is converted into a simulation model and analyzed with an in-house-developed simulation package for demonstrating how the proposed approach can be implemented to manage multiple schedule-overrun risks on construction projects.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2008년도 정기학술발표대회 논문집
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• pp.525-530
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• 2008

건설 산업은 수주 산업으로서 시설물의 수요자인 발주자에 의해서 생산 활동이 발생되고 시장이 형성된다는 특성을 가지고 있기 때문에 발주자의 기능과 역할이 사업의 성패에 미치는 영향이 타 산업에 비해서 매우 크다고 할 수 있다. 특히 사회기반시설(infrastructure)을 건설하는 공공 건설 산업의 경우 발주자의 기능과 역할에 따라 국가 재정에 큰 영향을 미치게 되므로, 민간사업에 비하여 발주자의 중요성이 더욱 더 강조된다. 하지만 이러한 발주자 및 발주기관의 기능과 역할에 대한 중요성에도 불구하고 현재까지 국내 건설 산업의 주요 수요자인 공공 발주기관의 기능과 역할의 전문성, 전반적인 수준이나 역량에 대한 객관적이고 의미 있는 평가에 대한 연구는 미흡한 실정이다. 이에 본 연구는 공공 발주기관의 역량에 대한 객관적인 평가를 실시할 수 있는 발주 역량 평가 지표를 개발하기 위하여 발주 역량의 평가 영역 및 요소를 정의하고자 한다. 이러한 평가 영역 및 요소를 활용하여 발주자의 현재 수준을 판단하고, 이를 통해 부족한 역량에 대한 정확한 판단을 하고 미래지향적인 전략을 수립할 수 있다면 발주자 조직 관리의 효율성을 높일 수 있을 것이다.

• 한국건설관리학회논문집
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• 제17권2호
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• pp.118-126
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• 2016

해외건설 시장은 정부와 건설기업들의 적극적인 노력에 힘입어 2015년 6월 누계 7,000억 불 수주를 돌파하는 경이로운 성장을 이루었다. 이러한 양적인 성장에도 불구하고 질적인 면에서 역량 부족, 기술력 부족 등이 대두되면서 내실화 문제가 지속적으로 제기되고 있다. 이를 극복하기 위하여 해외건설 성공요인에 대한 연구가 국내외적으로 활발히 이루어지고 있으며, 전문건설기업 선정이 핵심적인 성공요인으로써 그 중요성이 강조되고 있다. 그러나 기존 전문건설기업 선정 평가체계의 기준 미비 및 신뢰성 부족으로 인해 해외건설 시장에 진출한 국내기업의 합리적인 의사결정이 어려운 실정이다. 본 논문은 상관분석 및 다중회귀분석을 통하여 기존 사전역량평가와 사후수행평가의 문제점을 도출하였고, 세부 평가지표의 조정을 통해 개선된 평가체계를 제시하고자 한다. 제시된 평가체계는 성공적인 해외사업 수행을 위한 이상적인 전문건설기업 선정에 유용한 참고 자료로 활용 될 수 있을 것이라 기대된다.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.144-152
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• 2009

Construction contracts involve the allocation or distribution of the risks inherent to a construction project between or among contracting parties. However, it has been a common practice that only one party drafts the contract due to practical reasons and particular policies of various organizations. Interviews were conducted on some local contractors to gain their meaningful insights and standpoints on the allocation of each risk. These results were compared with the actual risk allocation using the Philippine government standard contract and risk principles from the literature to determine if their considered opinions provide a plausible alternative. A sample application of this evaluation is presented for construction-related risks and risk allocation recommendations are provided in the end.

• Architectural research
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• 제16권3호
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• pp.93-100
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• 2014

Existing BIM(Building Information Modeling) based energy evaluation tools cannot be utilized enough for the potential performance of BIM because most of them have not provided the integrated model for energy evaluation, assessment of the material, cost of the construction, and so on. This research aims to propose and develop a new application, EcoBIM, to support an integrated evaluation of the energy and cost efficiencies of the design alternatives within the design process. The proposed application functions as a BIM-based evaluation system that calculates energy-savings performance as well as the construction cost of the alternatives at the design stage. This study mainly focuses on the possibilities of developing the proposed technology. We also suggest an advanced design process using the proposed system, corresponding to changes of national regulations in Korea. This study deduce that EcoBIM can allow architects to make suitable decisions regarding energy- and cost-efficient designs. The proposed design process will allow architects not only to check the eco-friendly performance of design alternatives but also predict the operation cost in a certain period in the future. EcoBIM can prevent large-scale design changes required to obtain environmental certification and enable the owner to make an informed decision about the initial investment of construction according to the result of the analysis of the energy requirement at the design stage.

• 한국건설관리학회논문집
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• 제17권5호
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• pp.130-137
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• 2016

건설프로젝트의 성공은 프로젝트 관리자로서의 발주자의 참여가 중요하다. 그 이유는 일반적으로 프로젝트의 성공을 공기단축, 비용절감 등으로 측정하지만, 기존 성공을 측정하는 방법으로는 발주자의 역할을 고려하지 않고 있기 때문이다. 따라서 본 연구는 프로젝트 관리자로서 발주자를 위한 사업수행평가서를 개발하기 위해 통해 총 9개의 프로젝트 CSF와 27개의 sub-CSF를 도출하였다. 도출된 CSFs의 중요도를 평가하기 위해 AHP 기법을 활용하였으며, 기존 존재하던 PDRI 방법을 활용한 사업수행평가서를 개발하였다. 사업수행평가서를 활용하면 각 CSFs에 대한 초기 목표값을 설정하고 프로젝트 완료 후 평가 결과의 비교를 통해 프로젝트를 효과적으로 관리하고 평가할 수 있다. 평가결과를 실무적으로 활용하기 위한 솔루션 맵을 제시하고 활용 가능한 솔루션 툴을 제안한다. 추후 연구에는 실질적인 검증을 위해 다양한 프로젝트 사례를 추가할 뿐만 아니라 평가를 통해 현장에 적용 가능한 솔루션 툴을 지속적으로 개발해야한다.

• 한국건축시공학회지
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• 제11권4호
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• pp.387-395
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• 2011

In the construction of tall-building, concrete pumping influences the success of the project. In order to establish pumping technology for high speed construction of tall building, study for quantitative evaluation of flow characteristics and pumpability should be conducted. So in this study, the characteristics including the inner pipe pressure, rheological properties of concrete and mortar through the continuous pumping test were evaluated. Then we analyzed the relations between rheological properties and pumpability. In the result of test, there are high correlations between the rheological characteristics which represented by yield stress and plastic viscosity and pressure loss with pipe length. Also, we estimated pressure loss according to conditions of concrete mix and pumping through the evaluation of inner pipe friction.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2004년도 가을 학술발표회 논문집
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• pp.517-526
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• 2004

In the resent years, the early evaluation of concrete quality, construction and maintenance has been considered as all is of major concern due to the increase of loading and the degradation of structures related with time. This paper presents evaluation of structural safety performance using measured data of construction, on the basis of a field measurements for the prevention of unreliable concrete works. Measurements analyzed in this paper are early quality condition and performance assessment, serviceability performance by cracks and deflection, rating performance by loading, durability performance by chloride attack and carbonation. Thus, a quantitative assessment model of resistance capacity was developed here to meet the requirement for deteriorated concrete structures. The model focuses on damage mechanical of concrete structures deteriorated by initial damage factors for concrete quality and environment factors such as chloride and carbonation attacks. These results could provide useful information for concrete structures interested in design, construction and maintenance.

• 국제학술발표논문집
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• The 2th International Conference on Construction Engineering and Project Management
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• pp.563-572
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• 2007

Transportation infrastructure is critical to economic growth of a country such as China. Careful evaluation of investments in traffic infrastructure projects is therefore pertinent. As traditional evaluation methods do not consider the uncertainty of future cash flows and mobility during project execution, the real option approach is gradually gaining recognition in the context of valuing construction and infrastructure projects. However, many of the cases only evaluate individual options separately although multiple options often exist in a typical large infrastructure project. Using a highway project in China as a case study, this paper first evaluates a deferment option and a growth option embedded in the project. Subsequently, the values are combined using the fuzzy analytical hierarchy process. It is found that the combined value is less than the sum of the two option values. This finding is consistent with the theoretical observations given in past real option literature despite the use of a different approach.

• 국제학술발표논문집
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• The 4th International Conference on Construction Engineering and Project Management Organized by the University of New South Wales
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• pp.229-233
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• 2011

Recently, the scale of buildings has been increasing because of the high-rise trend and complexity of underground spaces. A significant number of steel structures have therefore been adopted for building construction. Since workers need to work in high places to install steel beams, many industrial accidents easily occur during steel-frame work. Furthermore, considering the increasing trend of building steel structures, the safety of the workers during the steel beam erection work is of concern. To improve the safety, a new type of joint, located between the steel column and beam, which can eliminate the need for working at the elevated height during steel beam erection has been developed in Korea. Using the newly developed technology in the construction field, the safety performance needs to be evaluated. This study presented the safety evaluation approach for the newly developed technology from the literature review, and applied the method to a self-supported steel joint. The result showed that applying the self-supported steel joint improved the safety of the steel erection work in terms of working posture, working environment, and risk exposure time.