• Title, Summary, Keyword: Construction phases

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Applications of bridge information modeling in bridges life cycle

  • Marzouk, Mohamed M.;Hisham, Mohamed;Al-Gahtani, Khalid
    • Smart Structures and Systems
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    • v.13 no.3
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    • pp.407-418
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    • 2014
  • The purpose of this paper is to present an Integrated Life Cycle Bridge Information Modeling that can be used throughout different phases of the bridge life cycle including: design, construction, and operation and maintenance phases. Bridge Information Modeling (BrIM) has become an effective tool in bridge engineering and construction. It has been used in obtaining accurate shop drawings, cost estimation, and visualization. In this paper, BrIM is used as an integrated tool for bridges life cycle information modeling. In the design phase, BrIM model can be used in obtaining optimum construction methods and performing structural advanced analysis. During construction phase, the model selects the appropriate locations for mobile cranes, monitors the status of precast components, and controls documents. Whereas, it acts as a tool for bridge management system in operation and maintenance phase. The paper provides a detailed description for each use of BrIM model in design, construction, and operation and maintenance phases of bridges. It is proven that BrIM is an effective tool for bridge management systems throughout their life phases.

Risk Analysis of Suspension Bridge by a Linear Adaptive Weighted Response Surface Method (선형 적응적 가중 응답면기법에 의한 현수교의 위험도 분석)

  • Cho, Tae Jun;Kim, Lee Hyeon;Cho, Hyo Nam
    • Journal of Korean Society of Steel Construction
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    • v.20 no.1
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    • pp.93-104
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    • 2008
  • study deals with the reliability assesment for the 5-year phases of a suspension bridge construction in Korea. The main objectives of this study are; (1) the evaluation of the reliability of a suspension bridge by considering an ultimate limit state for the fracture of main cable wires, (2) the determination of the critical phases among 28 construction stages for the deck erection, and (3) the evaluation of the reliability of the limit state for the erection control during construction stages. The research and the design of the suspension bridge have been focused on the state of construction mainly based on empirical data. Based on the recent survey of the distribution of accidents in Korean railways, over 80% of the accidents related to the uncertainties in human error, planning, design, materials and loads during construction have ben reported before the completion of construction. While many researches have evaluated the safety of bridges, the uncertainties in the construction phases have not been well treated in a guidelines or a specifications. An improved adaptive response surface method is used for the risk assessment in the construction phases of the target suspension bridge.

A Study on the Analysis of the Risk Factors for Overseas Plant Construction Projects (해외 화공플랜트 건설사업 위험요인 영향도 분석)

  • Cho, Seung-Yeon;Kim, Young-Su
    • Proceedings of the Korean Institute of Building Construction Conference
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    • pp.103-108
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    • 2010
  • The purpose of this study is to analyze of the risk factors for oversea plants construction projects. For this study, risk factors data from related literature review, research organization and construction company was researched and classified under each EPC phases. In addition, a questionnaire survey by plant experts was conducted for analysis of risk weight and costs and time impact on each EPC phases. The results of this study are as follows: First, a detail design errors(engineering phase), a equipment procurement plan(procurement phase), and exchange rate fluctuations(construction phase) were analyzed the highest weight factors. Second, a financing plan(engineering phase), quantity take-off bill(procurement phase), and exchange rate fluctuations(construction phase) were analyzed the highest cost impact factors. Third, detail design errors(engineering phase), a equipment procurement plan(procurement phase), and schedule management errors(construction phase) were analyzed the highest time impact factors.

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Analysis of Dispute Cases According to the Construction Project Phases -Focused on Cases of the Supreme Court and Korean Commercial Arbitration Board- (건설프로젝트 단계별 분쟁사례 분석에 관한 연구 - 대법원 및 대한 상사 중재원 사례를 중심으로 -)

  • Lee, Yi-Do;Park, Jeong-Ro;Kim, Jae-Jun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • pp.185-189
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    • 2010
  • As recent construction project has specialization and high-level of the engineering, Although, It has always uncertainty of agreement and contract enforcement, factors of difficult to predict etc. in each phase. In this process, Various interest groups involved are continuously generated dispute of interest each others. So this paper analyzed the dispute cases in construction projects from the Supreme Court and Korean Commercial Arbitration Board in Korea, and then identified the dispute types and causes that occur during all of the construction project phases with their influence analysis. At the result, It will be contributed to the basic data for pre-dispute prevention in the construction projects.

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Process of Using BIM for Small-Scale Construction Projects - Focusing on the Steel-frame Work - (소규모 건축공사의 BIM 정보 활용을 위한 프로세스 제안 - 철골공사 중심으로 -)

  • Kim, Jin-Kwang;Yoo, Moo-Young;Ham, Nam-Hyuk;Kim, Jae-Jun;Choi, Chang-Shik
    • Journal of KIBIM
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    • v.8 no.2
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    • pp.41-50
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    • 2018
  • The current study focused on the utilization of building information modeling (BIM) data in steel-frame structures, which help to reduce project durations because they employ prefabricated structural members that are assembled on-site. In addition, a business process model was proposed using BIM data collected during the preconstruction, structural steel fabrication, and on-site construction phases of an actual steel-frame project. The ultimate expectation is that BIM data support at each phase, as well as the increased understanding among project participants, will result in an increase in project management productivity. The results from the current study are summarized as follows: To implement a BIM capable of application to steel-frame projects and data utilization, existing theories were studied to develop the construction project steps, both generally into the preconstruction (A1), steel fabrication (A2), and on-site construction phases, (A3) and specifically into 19 BIM-applicable phases. Based on the derived BIM-applicable phases, the model elements of the BIM object were identified, and the shortcomings of existing steel-frame projects were ameliorated, resulting in an improved data flow model. Moreover, for the proposed BIM data flow to progress efficiently, the BIM specialist needs to be well-acquainted with the phase-specific three-dimensional (3D) model output, and the infrastructure to construct an error-free 3D model must be provided. Based on the actual construction example, the BIM data utilized steel-frame projects - via production reports, clash checks, two-dimensional (2D) drawings, four-dimensional (4D) simulations, and 3D scanning - to make cooperation and communication among participants easier.

The Analysis of the Major Cost-increasing Risk Factors from the Perspective of Construction Management -Focusing on Pre-construction Phases- (건설사업관리자 관점에서의 주요 사업비 초과 리스크 요인 분석 -시공 전(前)단계를 중심으로-)

  • Kim, Byung-Yong;Kim, Yea-Sang
    • Korean Journal of Construction Engineering and Management
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    • v.13 no.2
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    • pp.147-155
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    • 2012
  • Recently, various construction projects are invested with plenty capital, manpower and resources. The advanced methods of the construction management is introduced to Korea. However, the cases which get involved in excessive cost frequently occur. We can explain it means that the cost management in the entire phases and the risk factors in its works has not been done yet as expected. Thus, it is necessary to unearth risk factors relative to cost management and analyse them for preventing cost-increasing and the success of projects. In this point of view, this study aims to identify the risk factors of the cost management focused on pre-construction stages from the perspective of construction management which is possible to take part in the whole phases and works in cost management. Also, the impact priority and grade of risk factors to cost-increasing are evaluated by using FMEA.

Assessment of concrete degradation in existing structures: a practical procedure

  • Porco, Francesco;Uva, Giuseppina;Fiore, Andrea;Mezzina, Mauro
    • Structural Engineering and Mechanics
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    • v.52 no.4
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    • pp.701-721
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    • 2014
  • In the assessment of existing RC buildings, the reliable appraisal of the compressive strength of in-situ concrete is a fundamental step. Unfortunately, the data that can be obtained by the available testing methods are typically affected by a high level of uncertainty. Moreover, in order to derive indications about the degradation and ageing of the materials by on site tests, it is necessary to have the proper terms of comparison, that is to say, to know the reference data measured during the construction phases, that are often unavailable when the building is old. In the cases when such a comparison can be done, the in situ strength values typically turn out to be lower than the reference strength values (tests performed on taken samples during the construction). At this point, it is crucial to discern and quantify the specific effect induced by different factors: ageing of the materials; poor quality of the placement, consolidation or cure of the concrete during the construction phases; damage due to drilling. This paper presents a procedure for correlating the destructive compressive tests and non-destructive tests (ultrasonic pulse velocity tests) with the data documenting the compressive strength tested during the construction phases. The research work is aimed at identifying the factors that induce the difference between the in-situ strength and cubes taken from the concrete casting, and providing, so, useful information for the assessment procedure of the building.

A Study on the theory and cases of Constructability for Building Projects -With Case Study Application in Japan- (건설공사의 Constructability 이론과 적용사례에 관한 연구 - 일본의 사례연구를 중심으로 -)

  • Kim, Jin-Ho;Lim, Nam-Gi
    • Journal of the Korea Institute of Building Construction
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    • v.2 no.2
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    • pp.157-164
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    • 2002
  • In this study, attempts to analyze the case study of production design were carried out through: 1) exploration of the factors influencing the interface between architectural and production design phases; 2)application of precast technologies. Building design and construction planning in Japan may be characterized by ample use of Production Design which extends over the whole projects phases. Taking a composite construction system for apartment buildings which allow for alternative combination of different technologies as a case study object, three projects have been chosen to analyze actual process of determining product sub-system and their specification. And the expectancies of this paper are that it can be used as efficient data for improvement of system to systematize Constructability(Buildability) in korea.

An Analysis of Potential Environmental Impact Reduction for Combined Sewer Overflow Project using a LCA Methodology (LCA 기법을 활용한 합류식 하수도 월류수 사업의 잠재적 환경영향 저감효과 분석)

  • Jo, Hyun-Jung;Song, Jang-Hwan;Hwang, Yong-Woo;Park, Ji-Hyoung
    • Journal of Korean Society of Water and Wastewater
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    • v.25 no.6
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    • pp.885-892
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    • 2011
  • In this study, LCA(Life Cycle Assessment) on 'Saemangum CSO Project' was carried out to evaluate environmental impact which occurred during the construction and operation periods and the potential environmental impact reduction was analyzed by comparing production and reduction level of pollution loads. LCA was conducted out according to the procedure of ISO14040 which suggested Goal and Scope Definition, Life Cycle Inventory Analysis, Life Cycle Impact Assessment and Interpretation. In the Goal and Scope Definition, the functional unit was 1 m3 of CSO, the system boundary was construction and operation phases, and the operation period was 20 years. For the data collection and inventory analysis, input energies and materials from civil, architecture, mechanical and electric fields are collected from design sheet but the landscape architecture field is excepted. LCIA(Life Cycle Impact Assessment) was performed following the procedure of Eco-Labelling Type III under 6 categories which were resource depletion, eutrophication, global warming, ozone-layer destruction, and photochemical oxide formation. In the result of LCA, 83.4% of environmental impact occurred in the construction phase and 16.6% in the operation phase. Especially 78% of environmental impact occurred in civil works. The Global warming category showed the highest contribution level in the environmental impact categories. For the analysis on potential environmental impact reduction, the reduction and increased of environmental impact which occurred on construction and operation phases were compared. In the case of considering only the operation phase, the result of the comparison showed that 78% of environmental impact is reduced. On the other hand, when considering both the construction and operation phases, 50% of environmental impact is increase. Therefore, this study showed that eco-friendly material and construction method should be used for reduction of environmental impact during life cycle, and it is strongly necessary to develop technology and skills to reduce environmental impact such as renewable energies.

A Study on the Improvement of Pfocedure Management in the Painting Works (전문건설업체의 업무관리절차 개선에 관한 연구 - 공사단계별 도장공사 참여를 중심으로 -)

  • 송천수;임상모;조형근
    • Proceedings of the Korean Institute of Building Construction Conference
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    • pp.153-156
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    • 2003
  • Recently, as changing construction environment, we have come to need rational systematic and transparent in construction industry. In other to consider application possibility of CM in specialty construction, in this study improvement of procedure management by several construction phases in the coating with paint work.

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