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Title :Numerical study on the temporal changes of the principal stresses at the ends of the hollow PC-girders to control horizontal end cracks
Authors :Karimi, Abdul Khaliq
Uchida, Ryota
Aasim, Bashir Ahmad
Tomiyama, Jun
Suda, Yuya
Issue Date :7-May-2021
Abstract :Background/Objectives: To professionally meet bridge load demands, hollow PC-girders are recently considered for bridge construction, particularly in Japan. Hollow girders are pretensioned girders, which can be a good alternative for ordinary PC-girders by having lightweight, using less material than other beams, and spanning long distances. Hollow PC-girders can be vulnerable to horizontal end cracking at the time of prestressing strand release. Methods: In this study, a nonlinear finite element analysis was performed to investigate the occurrence of horizontal cracks at the time of prestressing at the ends of hollow PC-girders. First, the selected hollow girder was miniaturized to a span length of 4 m required for sufficiently prestressing; then, a standard static prestressing analysis was performed using a finite element analysis software Midas FEA. This software is an analysis tool with standard FEM analysis functions in the construction field and can perform detailed analysis for reinforcements and concrete crack analysis. The software was used to model the girder and investigate the temporal changes of principal stresses at hollow PC-girders’ ends. Findings: The study showed that placing only end-zone reinforcements cannot reduce principal stresses to the level to be less than the concrete’s tensile strength. However, debonding four PC-strands at the ends of the girder alongside the placement of end-zone reinforcements could sufficiently reduce principal stresses to the level to be less than the tensile strength of concrete, and consequently, horizontal cracks were eliminated at the ends of the hollow PC-girder.
URL :https://doi.org/10.17485/IJST/v14i16.2280
Type Local :雑誌掲載論文
ISSN :0974-6846
Publisher :Indian Society for Education and Environment
URI :http://hdl.handle.net/20.500.12000/49792
Citation :Indian Journal of Science and Technology Vol.14 no.16 p.1283 -1295
Appears in Collections:Peer-reviewed Journal Articles (Faculty of Engineering)

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