Journal
ENGINEERING STRUCTURES
Volume 38, Issue -, Pages 142-152Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2012.01.001
Keywords
Piers; Seismic; FRP tubes; Bridges; Segmented; Rocking; Finite element; Post-tensioning
Categories
Funding
- Transportation Northwest (TransNow) [463258]
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Precast segmental construction technique is an excellent candidate for economic rapid bridge construction in highly congested urban environments and environmentally sensitive regions. This paper presents three dimensional nonlinear finite element models using ABAQUS\Standard for evaluating the behavior of segmental precast post-tensioned piers under lateral loads. The piers were constructed by stacking precast concrete filled fiber reinforced polymer tube segments one on top of the other and then connecting the assembly structurally with vertical post-tensioning tendons passing through ducts located in the precast segments. A stress-strain relationship for confined concrete was used to model the concrete. The post-tensioning tendons were modeled with beam elements. The model was able to predict the backbone curves for two piers subjected to cyclic loads. A parametric study indicated that increasing the applied post-tensioning force increases nominal strength. Finally, the model showed that the pier aspect ratio, cross sectional diameter size, pier size, and confinement have significant effects on the performance of the investigated piers. (C) 2012 Elsevier Ltd. All rights reserved.
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