• 대한토목학회논문집
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• 제38권2호
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• pp.369-376
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• 2018

대부분의 건설 프로젝트는 초기단계에서부터 준공 운영단계에 이르기까지 다양한 유형의 부패에 영향을 받고 있다. 개발 도상국인 이란은 입찰, 투찰 과정, 계약 등에서 부패 문제로 어려움을 겪고 있다. 본 연구에서는 이란 건설 프로젝트를 대상으로 부패의 원인을 파악하고 그 중요도를 평가하고자 한다. 이를 위해 문헌연구를 통해 다양한 유형의 부패에 대해 조사하고 건설 프로젝트에 부패를 유발할 수 있는 잠재적 요소를 설문조사를 통해 파악하고자 한다. 설문지는 이란 건설 프로젝트에서 77가지 부패 원인을 포함하여 12 가지 유형의 부패를 고려하여 고안되었다. 수집된 설문지의 분석 및 탐색적 요인분석(EFA)을 통하여 "부적절한 권한 배분" 등 4가지의 주요 요인이 도출되었다. 본 연구 결과는 건설관계자와 학자들에게 도움이 될 것으로 사료된다.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제52권3호
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• pp.101-106
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• 2003

The high temperature superconductor transformers gain interests from the industries. This paper described construction and test results of 10㎸A HTS transformer Three phase transformer with double pancake windings were constructed. To reduce the leakage magnetic field, secondary coil were placed between the two primary coils. BSCCO-2223 wire. silicon sheet steel core and FRP cryostats were used to construct the transformer. Three coils were stacked in one cryostat. Two double pancake coils were connected in series for the primary coil and one double pancake coil was used for the secondary coil. Total number of turns of the primary winding and the secondary winding were 112turns and 98urns, respectively, The rated voltages of each winding were 440/220V. The rated currents of each winding were 13.1/26.2A. After the tests of basic properties of the three phase HTS transformer using no-load test, short-circuit test and full-load test, continuous operation of 100 hours with pure resistive load has been carried out. Test results proved over-load capability and reliability of the HTS transformer.

• 한국건축시공학회지
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• 제15권6호
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• pp.653-660
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• 2015

Technologies for reducing construction duration are key factors in nuclear power plant construction projects, as a reduction in construction duration at the construction phase leads to a reduction in construction cost and an increase in profits through the early operation of the nuclear power plant. To analyze the constructability of the height of single-layer placement of formwork for the Reactor Containment Building (RCB) exterior wall through lateral pressure according to the height of concrete placement, the deformation criteria for formwork, and a new form design, 'MIDAS GEN (hereinafter referred to as MIDAS)' is used in this study. The cost and workload of formwork are derived according to the unit of height of the RCB exterior wall. Based on the result, it was found that the higher the RCB exterior wall, the higher the material cost, and the less the construction duration and the less the total number of formwork layers. Based on this result, it is believed that the material cost and the construction duration can be appropriately determined according to the formwork height.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.639-640
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• 2015

Traditional construction planning based on historical data and heuristic adjustment can no longer incorporate all the operational details and guarantee the expected performance. The variation between the expected and the actual production leads to cost overruns or delay. Although predicting reliable productivity on construction site is getting more important, the difficulty of this increases. In this regard, this paper suggested to develop BIM-integrated simulation framework. This framework could predict productivity dynamics by considering factors affecting on construction productivity at operational phase. We developed the following processes; 1) enabling a BIM model to produce input data for simulation; 2) developing the construction operation simulation; 3) running simulation using BIM data and obtaining productivity results. The BIM-integrated simulation framework was tested with structural steel erection model because steel erection work is one of the most critical process influencing on the whole construction budget and duration. We could improve to predict more dynamic productivity from this framework, and this reliable productivity helps construction managers to optimize resource allocation, increase schedule reliability, save storage cost, and reduce material loss.

• 한국건설관리학회논문집
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• 제17권6호
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• pp.40-52
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• 2016

과거 1960~70년대에 급격한 경제발전으로 인하여 국내에는 수많은 건물이 건설되었으며, 특히 2000년 이후에는 대형화, 첨단화된 수많은 건물들이 건설이 되고 있다. 이러한 건물의 전 생애주기 비용 (Life Cycle Cost) 중, 운영 및 유지관리 단계 비용은 전체의 약 85%를 차지 (Teicholz 2004)하고 있어 건축물에 대한 효율적인 자산관리가 강조된다. 하지만 운영 및 유지관리 단계에서 필요한 정보들은 초기 기획 단계부터 설계, 시공 단계를 넘어오면서 각각의 정보들의 호환이 부족하다. 단계를 거듭할수록 정보에 대한 가치는 증가하지만 정보의 상호 호환의 부족으로 인하여 비효율적인 부분이 발생하고 있다 (Foster 2011). 본 연구에서는 먼저 발주자 관점에서 자산관리의 주요 업무기능을 3개의 대분류와 19개의 중분류로 도출하였다. 다음으로는 도출한 항목들을 바탕으로 자산관리 업무량의 비중, 자산관리 업무별 소요 데이터의 비중, 그리고 생애주기 단계별로 발생하는 데이터의 비중에 대한 평가방법론을 제안함으로써, 효율적인 운영 및 유지관리를 위한 방안을 제안하였다. 마지막으로, 제안된 방법론은 공공 및 민간 기업의 사례를 바탕으로 적용성을 검토하였다.

• 대한토목학회논문집
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• 제44권2호
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• pp.223-229
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• 2024

국토교통부에서는 설계 BIM 데이터를 시공 단계에 반영하기 위해 『건설산업 BIM 시행지침 시공자 편』을 제시하였다.(이하, '시행지침'이라 함.) 시행지침은 건설산업 전 분야의 전면 BIM 적용을 위하여 발주, 설계, 시공단계에 필요한 최소한의 BIM 업무 방법 및 절차 등의 세부 공통 실행방안의 가이드라인을 제공하기 위한 목적으로 작성되었다. 본 연구에서는 시행지침을 기준으로 간섭 및 설계오류를 검토하고, 장비배치 및 운영계획을 수립했던 다양한 현장에 대해 적용 효과를 파악하였다. 그 결과, 디지털 현장 3D 모델과 계획 모델을 한 공간에서 비교하여 직관적인 검토가 가능하였고, 시공 단계별 시뮬레이션 검토를 통해 최적의 장비배치 및 운용계획을 도출하였다.

• 설비공학논문집
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• 제25권4호
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• pp.216-224
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• 2013

Facility data is created throughout the design and construction phase. But the most facility managers bear significant costs that arise from the lack of interoperability with facility lifecycle. This paper is concerned with the way to collect facility data using BIM technology. The aim of this paper is to suggest BIM data modeling guide for the facility management using the information that need to be delivered from design and construction phase to operation and management phase. The BIM data modeling guide focus on the properties of mechanical equipment. It is to be hoped that this study will contribute to collect facility data from as-built BIM data and to build facility management system database without difficulty.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제19권4호
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• pp.47-60
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• 2013

Purpose: This study examines construction core plans for the users of vertical-typed general hospitals to effectivly use the flow line. Methods: The study sampled representative 9 hospitals, calculated the depth value through Convex Map of Space Syntax and Justified Graph according to the determination of form of construction cire, and analyzed its functional connectivity. Results: The analysis of the connectivity between operation core part and emergency part of core space with high importance in the hospitals showed that the types of hospital and hospital have the lowest depth value in the spatial phase diagram, where central treatment part and outpatient part are arranged well vertically. Elevators for patients at these hospitals are close to operation and emergency parts actually separated from the elevators for passengers. For shortening of flow line of patients and private movement environment, however, it is desirable to arrange the elevators for patients to be adjacent to the operation parts and to arrange the emergent patient entrances more effectively to separate them from the flow line of visitors and guardians. Implications: Consideration should be taken into account for the effective flow line design. This study hopefully may serve as a stepping stone for the standard design of horizontal/vertical flow line.

• Journal of Construction Engineering and Project Management
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• 제3권3호
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• pp.17-22
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• 2013

In many urban cities, super-tall buildings have been being constructed around New York and Chicago as the center since 1930 to improve the efficiency of land use and respond to new residential type. In terms of energy consumption, super-tall buildings are classified as a top energy consumption building. Also, as time passed, the degradation of energy performance occurs in super-tall buildings like general things so that these cannot show the initial performance planned in the design phase. Accordingly, building owners need to make a plan to apply energy saving measures to existing building during the operation phase. In order to select energy saving measures, calculus-based methods and enumerative schemes have been typically used. However, these methods are time-consuming and previous studies which used these methods have problems with not considering the initial construction cost. Consequently, this study proposes a model for selecting an optimal combination of energy saving measures which derives maximum energy saving within allowable cost using genetic algorithms. As a contribution of this research, it would be expected that a model is utilized as one of the decision-making tools during the planning stage for energy saving.

• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.294-299
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• 2013

In many urban cities, super-tall buildings have been being constructed around New York and Chicago as the center since 1930 to improve the efficiency of land use and respond to new residential type. In terms of energy consumption, super-tall buildings are classified as a top energy consumption building. Also, as time passed, the degradation of energy performance occurs in super-tall buildings like general things so that these cannot show the initial performance planned in the design phase. Accordingly, building owners need to make a plan to apply energy saving measures to existing building during the operation phase. In order to select energy saving measures, calculus-based methods and enumerative schemes have been typically used. However, these methods are time-consuming and previous studies which used these methods have problems with not considering the initial construction cost. Consequently, this study proposes a model for selecting an optimal combination of energy saving measures which derives maximum energy saving within allowable cost using genetic algorithms. As a contribution of this research, it would be expected that a model is utilized as one of the decision-making tools during the planning stage for energy saving.