Interaction Between Tracks and Continuous Rigid-Frame Bridge Carrying High-Speed Railway

Yan, Bin; Zhang, Gaoxiang; Xie, Haoran

doi:10.1007/978-981-15-2349-6_27

Cited by 1 publication

(1 citation statement)

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“…Then, time-dependent properties may lead to the surface cracking of concrete [8]. Lastly, creep accelerates structural deformation and increases deflection, consequently causing an increase in initial eccentricity and generating secondary internal forces due to creep [9,10], especially during the winter period [11] This weakens the bearing capacity of the control section. Numerical simulation methods have been widely accepted and recognized by scientific researchers since their inception due to the convenience of their application, the accuracy of their calculations and their clear theoretical foundations [12].…”

Section: Introductionmentioning

confidence: 99%

Long-Term Deflection Analysis of Large-Span Continuous Prestressed Concrete Rigid-Frame Bridges Based on a Refined Modeling Approach

Han,

Li,

2023

Applied Sciences

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Numerical modeling approaches are favored for performing long-term analyses of continuous prestressed concrete rigid-frame (CPCR) bridges due to the complexity and high cost of experimental testing on such structures. In this study, a refined numerical modeling approach is first presented and validated by comparing the field monitor data of an existing long-span CPCR bridge in China. Then, long-term deflection analysis—considering box girder cracks, concrete creep, joint damage behavior and prestress—is conducted based on the proposed refined modeling approach. It is found that the time-dependent loss of longitudinal prestress has the most significant influence on the long-term structural stiffness, while joint damage between different segments has limited impact on overall structural performance, especially for large-span bridge cases. The local stress distribution is significantly influenced by typical damage, albeit with a different scope of impact. Therefore, targeted reinforcement has to be performed to achieve satisfactory repair results under different damage conditions.

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