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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국계산역학회 Computers and Concrete, An International Journal Computers and Concrete, An International Journal Vol.19 No.1
- 발행연도
- 2017.1
- 수록면
- 1 - 6 (6page)
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초록· 키워드
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Prestressed concrete I-girders are subject to different load types at their construction stages. At the time of strand release, i.e., detensioning, prestressed concrete girders are under the effect of dead and prestressing loads. At this stage, the camber, total net upward deflection, of prestressed girder is summation of the upward deflection due to the prestressing force and the downward deflection due to dead loads. For the calculation of the upward deflection, it is generally considered that prestressed concrete I-girder behaves linear-elastic. However, the field measurements on total net upward deflection of prestressed I-girder after detensioning show contradictory results. In this paper, camber calculations with the linear-elastic beam and elastic-stability theories are presented. One of a typical precast I-girder with 120 cm height and 31.5 m effective span length is selected as a case study. 3D finite element model (FEM) of the girder is developed by SAP2000 software, and the deflections of girder are obtained from linear and nonlinear-static analyses. Only geometric nonlinearity is taken into account. The material test and field measurement of this study are performed at prestressing girder plant. The results of the linear-elastic beam and elastic-stability theories are compared with FEM results and field measurements. It is seen that the camber predicted by elastic-stability theory gives acceptable results than the linear-elastic beam theory while strand releasing.
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참고문헌 (24)
참고문헌 신청
AASHTO / 2012 / LRFD Bridge Design Specifications
ACI Committee 318 / 2008 / ACI 318-08 Building Code Requirements for Structural Concrete and Commentary / American Concrete Institute
Carrasquillo, R. L. / 1981 / Properties of high strength concrete subject to short-term loads / ACI J. 87(3):171~178
Chajes, A. / 1974 / Principles of Structural Stability Theory / Department of Civil Engineering, University of Massachusetts, Prentice-Hall, Inc.
Piero Colajanni / 2014 / Design procedure for prestressed concrete beams / Computers and Concrete, An International Journal 13(2):235~253
ACI Committee 318 / 2008 / ACI 318-08 Building Code Requirements for Structural Concrete and Commentary / American Concrete Institute
Carrasquillo, R. L. / 1981 / Properties of high strength concrete subject to short-term loads / ACI J. 87(3):171~178
Chajes, A. / 1974 / Principles of Structural Stability Theory / Department of Civil Engineering, University of Massachusetts, Prentice-Hall, Inc.
Piero Colajanni / 2014 / Design procedure for prestressed concrete beams / Computers and Concrete, An International Journal 13(2):235~253
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