Numerical Investigation of Seismic Rehabilitation of Mass Concrete Piers of a Railway Bridge Using Post-Tensioning Technique
Lightly reinforced mass concrete piers are seismically vulnerable due to their excessive weight and inadequate reinforcement. The present paper aims to outline an innovative method for seismic rehabilitation of such piers using post-tensioning technique. In the numerical case study carried out in the paper, it is shown that a prescribed compressive stress about five percent of the pier axial strength can promote the lateral load-carrying capacity by 60 percent. Moreover, the piers with originally brittle behavior show proper ductility applying adequate prescribed compression. The capability of the rehabilitated piers to reveal stable non-linearity is resulted in a minimum seismic response modification factor of 3.0, approximately. This value is comparable with unity considered for the existing piers. The nonlinear analysis conducted under cyclic loading confirms that the efficiency of this method does not considerably degrade during the loading excursions. Finally, a simplified method is proposed to estimate the amount of compression needed to achieve required strength and ductility.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/15732487
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Supplemental Notes:
- ©2018 IOS Press and A Moslehi Tabar and M R Rahbar. All rights reserved.
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Authors:
- Moslehi Tabar, A
- Rahbar, M R
- Publication Date: 2018
Language
- English
Media Info
- Media Type: Print
- Features: References;
- Pagination: pp 147-157
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Serial:
- Bridge Structures - Assessment, Design & Construction
- Volume: 14
- Issue Number: 4
- Publisher: IOS Press
- ISSN: 1573-2487
- EISSN: 1744-8999
- Serial URL: https://content.iospress.com/journals/bridge-structures
Subject/Index Terms
- TRT Terms: Bridge piers; Compressive strength; Concrete bridges; Ductility; Earthquake resistant design; Posttensioning; Railroad bridges; Rehabilitation
- Subject Areas: Bridges and other structures; Maintenance and Preservation; Materials; Railroads;
Filing Info
- Accession Number: 01714555
- Record Type: Publication
- Files: TRIS
- Created Date: Aug 23 2019 5:02PM