• Title/Summary/Keyword: Steel Box Girder Production Process

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Work Breakdown Structure(WBS) based on the Steel Box Girder Production Process Model (강교량 제작 프로세스 모델을 기반으로한 WBS구축)

  • Ha, Seung-Ho;Kim, Seok;Kim, Kyoung-Min;Park, Chan-Hyuk;Kim, Kyong-Ju
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2004.11a
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    • pp.521-525
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    • 2004
  • The objective of this study is to implement a WBS (Work Breakdown Structure) so as to support efficient information management through the construction process of Steel Box Girder Bridge. To meet this requirement. This study performs the analysis of the business process. Through the work, information flows and information management levels are identified. Information management in each manufacturing process was various in its level. For the efficient information management, skating and utilization in schedule, cost, resource, and quality management, it is recommended to utilize a WBS composed of major work section and element structure of the steel box girder.

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INTEGRATION MODEL OF COST AND SCHEDULE IN STEEL BOX GIRDER BRIDGE PRODUCTION PROCESS

  • Seok Kim;Kyoungmin Kim;Seung-Ho Ha ;Kyong Ju Kim
    • International conference on construction engineering and project management
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    • 2005.10a
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    • pp.1262-1267
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    • 2005
  • It is still difficult to share and utilize the information generated at each phase of a steel box girder production process due to the spatial gap and different level of management information. The physical distance results in the inefficiency of the information transmission, the accidental omission and typos of the relative information, and so on. Various levels of management information make it difficult to embody a new management system. Eventually, these factors incur the loss of cost and schedule and interrupt development of a new management system. This paper analyzes a current process and presents graphical process flow by using IDEF0. Based this analysis, the research for new production process and work breakdown structure (WBS) is conducted. At the end of this paper, the conceptual design of this system is suggested. Through new management system, it is expected that the model proposed in this study will improve the management process in the steel box production, and the improved process will reduce the redundant cost and schedule information, transmission and deposit generated by manual paper.

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Discrete Optimum Design of Sinusoidal Corrugated Web Girder (사인형 주름웨브보의 이산화 최적구조설계)

  • Shon, Su Deok;Yoo, Mi Na;Lee, Seung Jae
    • Journal of Korean Society of Steel Construction
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    • v.24 no.6
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    • pp.671-682
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    • 2012
  • The use of sinusoidal corrugated web girder for the box-type girders and gable steel main frames has recently been increasing very much. The reasons are that the thin web of the girder affords a significant weight reduction compared with rolled beam and welded built-up girder, and that corrugation prevents the buckling failure of the web. Improvements of the automatic fabrication process makes mass production of the corrugated web and unit possible, and applications of this girder have been extended considerably. Thus, the research for the optimum design processer considering the production data is needed practically. For doing this research, we develope the discrete optimum structural design program in consideration of production list data for the research, and the program apply to the single girder under the uniform load and the concentrated load as numerical example. We consider objective function as minimum weight of the girder, and use slenderness ratio, stress of flanges and corrugated web, and the girder deflection as the constraint functions. And also the Genetic Algorithms is adopted to search the global minimum point by using the production list as a discrete design variable. Finally, to verify the optimality of the design, we conduct a comparison of the results of the discrete optimum design with those of the continuous one, and also analyze the characteristics of the optimum cross-section.