[논문]Flexural analysis of transverse joints of prefabricated T-girder bridge superstructure

Kye, Seungkyung; Jung, Hyung-Jo; Park, Sun-Kyu

doi:10.12989/sem.2021.77.1.089

[국내논문] Flexural analysis of transverse joints of prefabricated T-girder bridge superstructure

Structural engineering and mechanics : An international journal, v.77 no.1, 2021년, pp.89 - 102

Kye, Seungkyung (Applied Science Research Institute, Korean Advanced Institute for Science and Technology) , Jung, Hyung-Jo (Department of Civil and Environmental Engineering, Korean Advanced Institute for Science and Technology) , Park, Sun-Kyu (School of Civil, Architectural and Environmental Engineering, Sungkyunkwan University)

Abstract ▼ AI-Helper

Rapid construction of prefabricated bridges requires minimizing the field work of precast members and ensuring structural stability and constructability. In this study, we conducted experimental and analytical investigations of transverse joints of prefabricated T-girder bridge superstructures to verify the flexural performance and serviceability. In addition, we conducted parametric studies to identify the joint parameters. The results showed that both the segmented and continuous specimens satisfied the ultimate flexural strength criterion, and the segmented specimen exhibited unified behavior, with the flexural strength corresponding to that of the continuous specimen. The segmented specimens exhibited elastic behavior under service load conditions, and the maximum crack width satisfied the acceptance criteria. The reliability of the finite element model of the joint was verified, and parametric analysis of the convexity of the joint section and the compressive strength of the filler concrete showed that the minimum deflection and crack width occurred at a specific angle. As the strength of the filler concrete increased, the deflection and crack width decreased. However, we confirmed that the reduction in the crack width was hardly observed above a specific strength. Therefore, a design suitable for prefabricated bridges and accelerated construction can be achieved by improving the joint specifications based on the required criteria.

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