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    Finite-Element-Based Study on Girder Behavior and Load-Sharing of Shear-Connected Multigirder Prestressed Concrete Bridges

    Source: Journal of Bridge Engineering:;2024:;Volume ( 029 ):;issue: 001::page 04023107-1
    Author:
    Jiadaren Liu
    ,
    John Alexander
    ,
    Shasha Song
    ,
    Yong Li
    DOI: 10.1061/JBENF2.BEENG-6064
    Publisher: ASCE
    Abstract: This paper aimed to study the girder behavior and load sharing of multigirder prestressed concrete (PC) bridges using an efficient nonlinear analysis tool based on finite-element (FE) modeling. A newly developed nonlinear beam element, which considers flexure–shear coupling, was adopted to model each girder. Nonlinear macroelements were adopted to model the shear connectors between adjacent girders. Nonlinear beam element modeling was validated by the experimental tests from one interior girder of the bridge considered in this study. The load–deformation relationship for the macroelement was obtained from a three-dimensional continuum-based FE model of shear connectors. The nonlinear analysis apparatus for multigirder bridge systems was applied to study the girder behavior and load sharing of the studied bridge under both flexure-dominant and shear-critical loading scenarios. The advantage of the nonlinear analysis tool, using a nonlinear beam element that considers flexure–shear coupling, was demonstrated through comparison to the model using the conventional nonlinear beam element that neglects shear deformation or flexure–shear coupling. Moreover, the influence of shear connectors on load-carrying capacity and load sharing was quantified by comparing the bridge system behavior of shear-connected girders and that of disconnected girders (with isolated individual girders). It is found that shear connectors play a significant role, but less under shear-critical scenarios than under flexure-dominated scenarios. The influence of losing shear connectors (e.g., due to corrosion damage) and increasing shear connectors on the bridge system behavior (e.g., during rehabilitation or upgrading) was studied. The results indicated that one single shear connector loss out of five between two adjacent girders could result in an overall load-carrying capacity loss of up to 14.32% for the considered multigirder bridge while adding more shear connectors between adjacent girders (e.g., from 5 to 9) can effectively improve the overall load-carrying capacity.
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      Finite-Element-Based Study on Girder Behavior and Load-Sharing of Shear-Connected Multigirder Prestressed Concrete Bridges

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4297257
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    contributor authorJiadaren Liu
    contributor authorJohn Alexander
    contributor authorShasha Song
    contributor authorYong Li
    date accessioned2024-04-27T22:41:11Z
    date available2024-04-27T22:41:11Z
    date issued2024/01/01
    identifier other10.1061-JBENF2.BEENG-6064.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4297257
    description abstractThis paper aimed to study the girder behavior and load sharing of multigirder prestressed concrete (PC) bridges using an efficient nonlinear analysis tool based on finite-element (FE) modeling. A newly developed nonlinear beam element, which considers flexure–shear coupling, was adopted to model each girder. Nonlinear macroelements were adopted to model the shear connectors between adjacent girders. Nonlinear beam element modeling was validated by the experimental tests from one interior girder of the bridge considered in this study. The load–deformation relationship for the macroelement was obtained from a three-dimensional continuum-based FE model of shear connectors. The nonlinear analysis apparatus for multigirder bridge systems was applied to study the girder behavior and load sharing of the studied bridge under both flexure-dominant and shear-critical loading scenarios. The advantage of the nonlinear analysis tool, using a nonlinear beam element that considers flexure–shear coupling, was demonstrated through comparison to the model using the conventional nonlinear beam element that neglects shear deformation or flexure–shear coupling. Moreover, the influence of shear connectors on load-carrying capacity and load sharing was quantified by comparing the bridge system behavior of shear-connected girders and that of disconnected girders (with isolated individual girders). It is found that shear connectors play a significant role, but less under shear-critical scenarios than under flexure-dominated scenarios. The influence of losing shear connectors (e.g., due to corrosion damage) and increasing shear connectors on the bridge system behavior (e.g., during rehabilitation or upgrading) was studied. The results indicated that one single shear connector loss out of five between two adjacent girders could result in an overall load-carrying capacity loss of up to 14.32% for the considered multigirder bridge while adding more shear connectors between adjacent girders (e.g., from 5 to 9) can effectively improve the overall load-carrying capacity.
    publisherASCE
    titleFinite-Element-Based Study on Girder Behavior and Load-Sharing of Shear-Connected Multigirder Prestressed Concrete Bridges
    typeJournal Article
    journal volume29
    journal issue1
    journal titleJournal of Bridge Engineering
    identifier doi10.1061/JBENF2.BEENG-6064
    journal fristpage04023107-1
    journal lastpage04023107-14
    page14
    treeJournal of Bridge Engineering:;2024:;Volume ( 029 ):;issue: 001
    contenttypeFulltext
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