SUPERSTRUCTURAL REDESIGN OF A POST-TENSIONED PRESTRESSED CONCRETE BRIDGE
DOI:
https://doi.org/10.26740/rekats.v13n02.p275-287Keywords:
Redesign, Bridge, Prestressed Concrete, Post-Tensioned, PCI GirderAbstract
Bridge construction is one of the key infrastructures actively developed to support highway transportation needs. This study focuses on the redesign of a prestressed concrete bridge using post-tensioned PCI girders for the superstructure of the bridge by extending the length from 45.8 m to 50 m. The bridge is constructed to facilitate the production of nickel. The PCI girders used in this study refer to WIKA Beton’s H-210 cm production with a concrete strength of 70 MPa. The results of the study indicate a prestressing force of 19,434.34 kN and an effective prestressing force of 14,413.13 kN. Additionally, the total prestress loss was determined to be 19.88%. The prestressing system applied to each girder consists of five tendons, with each tendon containing 27 parabolically arranged strands. The bridge modeling was conducted using SAP2000 software to analyze internal forces and deflections. The bridge loading data is based on the existing traffic conditions, specifically 50-ton and 60-ton trucks. The PCI girder design follows guidelines from the Prestressed Concrete Institute, AASHTO LRFD 2012, SNI 1725:2016 as the bridge loading standard and other relevant sources for further technical considerations.
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