• Title/Summary/Keyword: 탄성지반 위의 보이론

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An Exact Analysis of Steel Box Girders with the Effects of Distortional Deformation of Sections (단면변형의 효과를 포함한 강상자형 거더의 엄밀한 해석)

  • 진만식;이병주;김문영
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.17 no.1
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    • pp.11-20
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    • 2004
  • The main goal of this study is to develop MATLAB programming for an analysis of distortional deformations and stresses of the straight box girder. For this purpose, a distortional deformation theory is firstly summarized and then a BEF (Beam on Elastic Foundation) theory is presented using analogy of the corresponding variables. Finally, with governing equations of the beam-column element on elastic foundation, an exact element stiffness matrix of the beam element and nodal forces equivalent to concentrated and distributed loads are evaluated via a generalized linear eigenvalue problem. In order to verify the efficiency and accuracy of this method, distortional stresses of box girders with multiple diaphragms are presented and compared with results by FEA.

Anlysis and Design of Wale in Innovative Prestressed Support(IPS) System (혁신적 프리스트레스트 가시설(IPS)공법에 적용되는 띠장의 설계 및 해석)

  • Kim, Sung-Bo;Han, Man-Yop;Kim, Moon-Young;Kim, Nak-Kyung;Ji, Tea-Sug
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.18 no.1
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    • pp.79-91
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    • 2005
  • The behaviors and design procedures of wale in innovative prestressed support(IPS) system are presented in this paper. Using the theory of the beam on elastic foundation, the member forces of the wale under initial pretension are evaluated. Choosing cable tensions as redundant forces, member forces subjected to earth pressure are calculated by the statically indeterminate analysis. The computer analysis model under uniform and non-uniform earth pressure is constructed using beam element for the IPS wale, tension-only element for cable, and compression-only element for soil. Axial forces and bending moments of IPS wale under initial pretension and design earth pressure are calculated. The combined stresses due to these axial force and bending moment are estimated to satisfy the design formula.