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    Lateral Behavior of Precast Segmental UHPC Bridge Columns Based on the Equivalent Plastic-Hinge Model

    Source: Journal of Bridge Engineering:;2019:;Volume ( 024 ):;issue: 003
    Author:
    Zhen Wang; Jingquan Wang; Yuchuan Tang; Yufeng Gao; Jian Zhang
    DOI: 10.1061/(ASCE)BE.1943-5592.0001332
    Publisher: American Society of Civil Engineers
    Abstract: The concept of an equivalent plastic-hinge model was used to evaluate the lateral behavior of precast segmental ultra-high-performance concrete (UHPC) bridge columns. The columns consist of precast UHPC segments that were integrated by unbonded post-tensioning (PT) tendons and complemented with energy dissipation (ED) bars. The equivalent constitutive relationships of the PT tendons and the ED bars were analytically derived to meet the plane section assumption for the sectional analysis. Cyclic loading tests were conducted on three specimens to validate the proposed equivalent plastic-hinge model. The test results revealed that the proposed model showed good accuracy for predicting the lateral skeleton curve, stiffness, and opening at the base joint. Using the validated model, a parametric study was conducted to investigate the effects of nine main design parameters on the lateral behavior of the column. The parametric study showed that increasing the PT level is more economical to enhance the PT force than relying on the larger ratio of the PT tendons when the PT level is no more than 44% of the yield strength. Finally, a simplified formula for the effective stiffness was developed through regressive analysis. The effective stiffness depended on the aspect ratio, the number and unbonded length of ED bars, and axial loading ratio.
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      Lateral Behavior of Precast Segmental UHPC Bridge Columns Based on the Equivalent Plastic-Hinge Model

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4255416
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    • Journal of Bridge Engineering

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    contributor authorZhen Wang; Jingquan Wang; Yuchuan Tang; Yufeng Gao; Jian Zhang
    date accessioned2019-03-10T12:22:25Z
    date available2019-03-10T12:22:25Z
    date issued2019
    identifier other%28ASCE%29BE.1943-5592.0001332.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4255416
    description abstractThe concept of an equivalent plastic-hinge model was used to evaluate the lateral behavior of precast segmental ultra-high-performance concrete (UHPC) bridge columns. The columns consist of precast UHPC segments that were integrated by unbonded post-tensioning (PT) tendons and complemented with energy dissipation (ED) bars. The equivalent constitutive relationships of the PT tendons and the ED bars were analytically derived to meet the plane section assumption for the sectional analysis. Cyclic loading tests were conducted on three specimens to validate the proposed equivalent plastic-hinge model. The test results revealed that the proposed model showed good accuracy for predicting the lateral skeleton curve, stiffness, and opening at the base joint. Using the validated model, a parametric study was conducted to investigate the effects of nine main design parameters on the lateral behavior of the column. The parametric study showed that increasing the PT level is more economical to enhance the PT force than relying on the larger ratio of the PT tendons when the PT level is no more than 44% of the yield strength. Finally, a simplified formula for the effective stiffness was developed through regressive analysis. The effective stiffness depended on the aspect ratio, the number and unbonded length of ED bars, and axial loading ratio.
    publisherAmerican Society of Civil Engineers
    titleLateral Behavior of Precast Segmental UHPC Bridge Columns Based on the Equivalent Plastic-Hinge Model
    typeJournal Paper
    journal volume24
    journal issue3
    journal titleJournal of Bridge Engineering
    identifier doi10.1061/(ASCE)BE.1943-5592.0001332
    page04018124
    treeJournal of Bridge Engineering:;2019:;Volume ( 024 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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