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    Beam Finite Element Including Shear Lag Effect of Extra-Wide Concrete Box Girders

    Source: Journal of Bridge Engineering:;2018:;Volume ( 023 ):;issue: 011
    Author:
    Zhou Guangpan;Li Aiqun;Li Jianhui;Duan Maojun;Spencer Billie F.;Zhu Li
    DOI: 10.1061/(ASCE)BE.1943-5592.0001297
    Publisher: American Society of Civil Engineers
    Abstract: The paper presents a new formulation of a beam finite element for the time-dependent analysis of self-anchored suspension bridges, considering the shear lag in a multicell concrete box girder. The beam kinematics are deduced using a displacement-based approach. Warping of the girder section is captured with a warping intensity function representing the warping magnitude along the girder axis and a series of segmental shape functions describing the warping shape of the asymmetrical multicell box section, which is deduced based on shear flow transmission. A three-dimensional 14 degree-of-freedom (dof) beam finite element employing hermitian polynomials to ensure consistent displacement interpolation is proposed. The proposed beam element is implemented in ANSYS as a user-defined element. The convergence test results and comparisons with the refined analyses using a solid finite-element model demonstrate the accuracy of the proposed element. Time-dependent behavior of concrete is calculated using the B3 prediction model and the age-adjusted elastic modulus method. The moment estimation method is adopted to conduct the random analysis, which yields the 95% confidence limits of the structural responses obeying approximately the normal distribution. Application to a full-scale bridge structure shows the efficiency and accuracy of the proposed method and its ability to describe the elastic and time-dependent behavior of a self-anchored suspension bridge with extra-wide concrete girders.
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      Beam Finite Element Including Shear Lag Effect of Extra-Wide Concrete Box Girders

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4248443
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    contributor authorZhou Guangpan;Li Aiqun;Li Jianhui;Duan Maojun;Spencer Billie F.;Zhu Li
    date accessioned2019-02-26T07:38:27Z
    date available2019-02-26T07:38:27Z
    date issued2018
    identifier other%28ASCE%29BE.1943-5592.0001297.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4248443
    description abstractThe paper presents a new formulation of a beam finite element for the time-dependent analysis of self-anchored suspension bridges, considering the shear lag in a multicell concrete box girder. The beam kinematics are deduced using a displacement-based approach. Warping of the girder section is captured with a warping intensity function representing the warping magnitude along the girder axis and a series of segmental shape functions describing the warping shape of the asymmetrical multicell box section, which is deduced based on shear flow transmission. A three-dimensional 14 degree-of-freedom (dof) beam finite element employing hermitian polynomials to ensure consistent displacement interpolation is proposed. The proposed beam element is implemented in ANSYS as a user-defined element. The convergence test results and comparisons with the refined analyses using a solid finite-element model demonstrate the accuracy of the proposed element. Time-dependent behavior of concrete is calculated using the B3 prediction model and the age-adjusted elastic modulus method. The moment estimation method is adopted to conduct the random analysis, which yields the 95% confidence limits of the structural responses obeying approximately the normal distribution. Application to a full-scale bridge structure shows the efficiency and accuracy of the proposed method and its ability to describe the elastic and time-dependent behavior of a self-anchored suspension bridge with extra-wide concrete girders.
    publisherAmerican Society of Civil Engineers
    titleBeam Finite Element Including Shear Lag Effect of Extra-Wide Concrete Box Girders
    typeJournal Paper
    journal volume23
    journal issue11
    journal titleJournal of Bridge Engineering
    identifier doi10.1061/(ASCE)BE.1943-5592.0001297
    page4018083
    treeJournal of Bridge Engineering:;2018:;Volume ( 023 ):;issue: 011
    contenttypeFulltext
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