• Title, Summary, Keyword: 프리스트레스 박스 거더교

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Development of BIM based Programs for Design and Drawing of PSC Box Girder Bridges (BIM 기반의 PSC 박스 교량 설계 자동화 및 도면 관리 툴 개발)

  • Hwang, Kyu-Hwan;Ahn, Do-Hwan;Seok, Hyun-Su;Shim, Chang-Su
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • pp.97-100
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    • 2010
  • 3차원 정보모델에 기반한 설계 자동화 프로그램의 개발은 좀 더 완성도가 높은 설계안을 도출할 수 있는 방안을 제시할 수 있다. 콘크리트 교량의 설계 과정에서 정형화된 구조 검토 단계 부분을 자동화하고 설계자로 하여금 좀 더 창의적인 설계가 가능하도록 지원하는 시스템을 개발하였다. 특히, 3차원 Building Information Modeling 기반의 프리스트레스트 콘크리트 박스 거더교에 대한 설계 자동화 시스템을 개발하였다. 이를 위하여 3차원 렌더링 알고리즘을 사용하여, 사용자가 원하는 단면 위치 및 분류 체계에 따라 설계를 자동으로 수행할 수 있도록 적용하였다. 또한 생성된 도면은 데이터 호환이 가능함으로써, 사용자의 편의성이 향상될 것으로 판단된다. 이는 설계자동화 분야에서 강교에 국한되었던 점을 콘크리트교를 포함한 주요 교량으로 확대하고 설계 성과품으로 3차원 모델을 도출할 뿐 아니라 2차원 도면을 연계하도록 구성하여 토목 엔지니어의 기술력을 향상시킬 것으로 기대된다.

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Research on Variable Girder Types and Tendon Arrangement of PSC Box Girder Bridges by using the Optimum Design (최적설계에 의한 PSC 박스 거더교의 변단면 거더유형과 긴장재 배치에 관한 연구)

  • Kim, Ki-Wook
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.10 no.3
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    • pp.175-185
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    • 2006
  • This study performed the optimum design of balanced and unbalanced span length bridges with many variable Girder types by using the optimum design program to minimize the cost for PSC box girder bridge of the full staging method. The objective of this study is to present tendon's application direction about complicated construction hereafter by studying about optimum tendon arrangement that is worked in each variable Girder type. This program used SUMT procedure and Kavlie's extended penalty function to allow infeasible design points in the process. Powell's direct method was used in searching design points and Gradient Approximate Method was used to reduce design hours.

Optimum Design of PSC Box Girder Bridge considering the Influence of Unequal Span Length Division, Load Factor, and Variable Girder Depth (부등 경간 비율, 하중계수 및 변단면의 영향을 고려한 PSC 박스 거더교의 최적설계)

  • 박문호;김기욱
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.17 no.3
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    • pp.309-318
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    • 2004
  • This research automatically designed psc-box girder bridges by using an optimum design program and applied the results to the various types of bridges to verify if common facts used in steel bridges or concrete bridges can be applied to PSC bridges. Namely, it investigated appropriate unequal span length division by comparing with bridge of unequal and equal span length division, and verified the influence of the load factors which are changed by time or specification applying the results to various types of bridge. and it applied reinforced concrete bridge and steel bridge's variable girder depth which is slender and effective to save material costs to PSC box girder bridges. Technical solution of optimum design program used SUMT procedure, and Kavlie's extended penalty function to allow infeasible design points in the process. Powell's direct method was used for searching design points and a gradient's approximate method was used to reduce the design time.

The Optimum Design for PSC Box Girder Bridges Considering Friction Coefficient and Material Strength (마찰계수와 재료강도를 고려한 PSC 박스 거더교의 최적설계)

  • Kim, Ki Wook
    • Journal of Korean Society of Steel Construction
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    • v.18 no.2
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    • pp.181-189
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    • 2006
  • This study analyzes the effects of the curvature friction coefficient, the wobble friction coefficient, and the increased strength of concrete, reinforced tendon on optimum de signs by using the optimum-design program, to minimize the cost of a PSC box girder bridge using the full staging method. The objective of this study is to find a proper tendon for the friction coefficient, and thereafter, to indicate the direction of the study development about tendons and to indicate the direction of a study on the increased strength of used materials. This program used the SUMT procedure and Kavlie's extended-penalty function to allow infeasible design points in the process. Powel's direct method was used in searching design points, and the gradient approximate method was used to reduce the design hours.

Research on the Optimum Design for PSC Box Girder Bridges Using the Full Staging Method (FSM 공법 PSC 박스 거더교의 최적설계에 관한 연구)

  • Kim, Ki-Wook;Park, Moon-Ho;Chang, Chun-Ho
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.8 no.3
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    • pp.159-167
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    • 2004
  • The objective of this study is development of the optimum design program to minimize the cost for PSC box girder bridge using the full staging method to indicate the necessity for the optimum design applied many types of bridges. It also considered the proper span length to girder depth ratio and the cell number along the width of bridge. This program used SUMT procedure and Kavlie's extended penalty function to allow infeasible design points in the process. Powell's direct method was used in searching design points and Gradient Approximate Method was used to reduce design hours. This study showed the convergence in design parameter and correlation of totally optimized cost according to cell numbers, span lengths, and lane numbers.

The Effects of a Launching Nose on Main Girder Erected by Incremental Launching Method (압출공법에 의한 가설시 추진코가 주형에 미치는 영향)

  • Oh, Kwi Hwan;Kim, Chul Young;Park, Young Suk
    • Journal of The Korean Society of Civil Engineers
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    • v.12 no.4
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    • pp.1-10
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    • 1992
  • Since the structural system of a prestressed concrete bridge erected by Incremental Launching Method is varying continuosly during construction, the main girder bears alternating stress resultants different from those under a service load condition. The magnitude of these stress resultants depends on span lengths, nose length and stiffness ratios between girder and nose. A parametric study is performed for various span lengths, nose lengths and stiffness ratios. In order to analyze structural systems varying at every launching step two programs are developed; a pre-processor which automatically produces a data file for each stage and a main-processor which can summarize the results of all stages. From the results, the relationships between optimum nose length and stiffness ratio are proposed for various span lengths.

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