Dynamic analysis of bridges with plastic hinges under extreme earthquakes

T. Y. Lee, K. J. Chung

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This study is aimed to develop the model of fiber element in the Vector Form Intrinsic Finite Element (VFIFE) to analyze the plastic hinges of reinforced-concrete columns for bridges subjected to extreme earthquakes. The VFIFE, a new computational method, is adopted in this study because of the superior in managing the engineering problems with material nonlinearity, discontinuity, large deformation and arbitrary rigid body motions of deformable bodies. In the past study, a plastic hinge is idealized as a bilinear elastoplastic model with a fracture moment. In order to analyze the realistic behavior of the plastic hinge, especially in ultimate state, the fiber element is developed to simulate the plastic hinge by using stress-strain relations in cover concrete, core concrete and steel fibers. The developed fiber element is verified to be feasible and accurate through numerical simulation. A three-span-continuous isolated bridge is analyzed to investigate the function of the columns and unseating prevention devices and to predict the collapse situation of the whole bridge. In addition, the analysis results are compared between the fiber element and bilinear elastoplastic element.

Original languageEnglish
Title of host publicationISEC 2015 - 8th International Structural Engineering and Construction Conference
Subtitle of host publicationImplementing Innovative Ideas in Structural Engineering and Project Management
EditorsSwapan Saha, Yixia X. Zhang, S. Yazdani, Amarjit Singh
PublisherISEC Press
Pages175-180
Number of pages6
ISBN (Electronic)9780996043717
DOIs
StatePublished - 2015
Event8th International Structural Engineering and Construction Conference: Implementing Innovative Ideas in Structural Engineering and Project Management, ISEC 2015 - Sydney, Australia
Duration: 23 Nov 201528 Nov 2015

Publication series

NameISEC 2015 - 8th International Structural Engineering and Construction Conference: Implementing Innovative Ideas in Structural Engineering and Project Management

Conference

Conference8th International Structural Engineering and Construction Conference: Implementing Innovative Ideas in Structural Engineering and Project Management, ISEC 2015
Country/TerritoryAustralia
CitySydney
Period23/11/1528/11/15

Keywords

  • 3D VFIFE
  • Bridge
  • Fiber element
  • Ultimate state

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