Nonlinear Finite Element Analysis of a FRP-Strengthened Reinforced Concrete Bridge
Publication: Journal of Bridge Engineering
Volume 11, Issue 1
Abstract
Three-dimensional nonlinear finite element (FE) models are developed to examine the structural behavior of the Horsetail Creek Bridge strengthened by fiber-reinforced polymers (FRPs). A sensitivity study is performed varying bridge geometry, precracking load, strength of concrete, and stiffness of the soil foundation to establish a FE model that best represents the actual bridge. Truck loadings are applied to the FE bridge model at different locations, as in an actual bridge test. Comparisons between FE model predictions and field data are made in terms of strains in the beams for various truck load locations. It is found that all the parameters examined can potentially influence the bridge response and are needed for selection of the optimal model which predicts the magnitudes and trends in the strains accurately. Then, using the optimal model, performance evaluation of the bridge based on scaled truck and mass-proportional loadings is conducted. Each loading type is gradually increased until failure occurs. Structural responses are compared for strengthened and unstrengthened bridge models to evaluate the FRP retrofit. The models predict a significant improvement in structural performance due to the FRP retrofit.
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Acknowledgments
This project was supported by the Oregon Department of Transportation (ODOT), Salem, Ore., and the Department of Civil, Construction, and Environmental Engineering, Oregon State University, Corvallis, Ore. The writers wish to thank the reviewers for their valuable suggestions and comments.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 11 • Issue 1 • January 2006
Pages: 21 - 32
Copyright
© 2006 ASCE.
History
Received: May 28, 2003
Accepted: Dec 30, 2004
Published online: Jan 1, 2006
Published in print: Jan 2006
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