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Design Optimization and Structural Performance Evaluation of Plate Girder Bridge Constructed Using a Turn-Over

Gi-Ha Eom1, Sung Jae Kim2, Tae-Hee Lee3

  • 1School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Korea. gheom@hanmail.net.

Materials (Basel, Switzerland)
|August 5, 2017
PubMed
Summary

Engineers developed a new Turn-Over (TO) wheel system for constructing I-girder bridges. This innovation optimizes bridge performance and cost by enabling easier girder inversion and varied cross-sectional designs.

Keywords:
precasted girderpreflex methodturn over constructiontwo- or three- girder plate bridge

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Area of Science:

  • Civil Engineering
  • Structural Engineering
  • Materials Science

Background:

  • Bridge construction focuses on optimizing cost-to-performance ratios.
  • Two- or three-girder plate superstructures are common, but I-girder performance enhancements are under-researched.
  • The preflex method improves I-girder performance but faces construction challenges with girder inversion.

Purpose of the Study:

  • To introduce and evaluate a novel Turn-Over (TO) wheel system for preflex construction.
  • To investigate the impact of varying concrete confinement section locations in I-girder/concrete plate systems.
  • To determine the optimal cross-sectional design for I-girder/concrete plate systems using the TO method.

Main Methods:

  • Developed and utilized a new Turn-Over (TO) wheel system for easier girder inversion.
  • Varied design parameters such as effective height, flange thickness, and confining concrete section width.
  • Constructed and tested a 20 m TO girder/plate system and two 20 m TO girder bridges.

Main Results:

  • Achieved an optimized cross-sectional design for the I-girder/concrete plate system.
  • Evaluated the performance of TO girder systems, obtaining data on failure behavior, load capacity, and crack patterns.
  • Demonstrated the feasibility and advantages of the TO construction method for diverse I-girder designs.

Conclusions:

  • The TO wheel system facilitates preflex construction, overcoming inversion difficulties.
  • Optimized I-girder cross-sections enhance bridge performance and cost-effectiveness.
  • The study provides valuable data for the design and construction of efficient I-girder bridges.