Simulation and Performance-Based Earthquake Engineering Assessment of Self-Centering Post-Tensioned Concrete Bridge Systems
Abstract/Contents
- Abstract
- The focus of this research is on conducting a performance-based earthquake engineering assessment of self-centering bridge columns for structural concrete bridges. Standard highway bridges in highly seismic regions are typically designed for columns to undergo large inelastic deformations during severe earthquakes, which can result in residual displacements. These residual displacements are a measure of post-earthquake functionality in bridges, and can determine whether or not a bridge remains usable following an earthquake. To mitigate the effects of residual displacements, a number of self-centering systems for bridge columns using unbonded, post-tensioned reinforcing steel are proposed and investigated. The research reported herein had three objectives: (1) to assess and develop simulation methods and models that can accurately capture key performance attributes of reinforced concrete and unbonded, posttensioned concrete bridge piers, to facilitate their comparison, (2) to provide a systematic assessment of various self-centering bridge column systems in terms of engineering performance as well as expected repair costs and downtime including a quantitative comparison to current code-conforming reinforced concrete bridge designs using the Performance-Based Earthquake Engineering methodology developed by the Pacific Earthquake Engineering Research Center, and (3) evaluate the Performance-Based Earthquake Engineering methodology itself. The unbonded post-tensioned systems were found to perform comparably to the conventional reinforced concrete system in terms of peak drifts. Reductions to column damage in the case of some of the systems were found not to justify their higher initial costs. However, the unbonded post-tensioned columns sustained considerably lower residual drifts than the reinforced concrete columns, leading to significant reductions in expected bridge downtime following large earthquakes. These significant reductions in downtime make the unbonded post-tensioned systems desirable for important bridges that must remain operational following an earthquake.
Description
| Type of resource | text |
|---|---|
| Date created | March 2007 |
Creators/Contributors
| Author | Lee, W |
|---|---|
| Author | Billington, SL |
Subjects
| Subject | self-centering |
|---|---|
| Subject | seismic performance |
| Subject | risk assessment |
| Genre | Technical report |
Bibliographic information
| Related item | |
|---|---|
| Location | https://purl.stanford.edu/gz684zv9986 |
Access conditions
- Use and reproduction
- User agrees that, where applicable, content will not be used to identify or to otherwise infringe the privacy or confidentiality rights of individuals. Content distributed via the Stanford Digital Repository may be subject to additional license and use restrictions applied by the depositor.
- License
- This work is licensed under a Creative Commons Attribution 3.0 Unported license (CC BY).
Preferred citation
- Preferred Citation
- Lee, W and Billington, S. (2007). Simulation and Performance-Based Earthquake Engineering Assessment of Self-Centering Post-Tensioned Concrete Bridge Systems. John A. Blume Earthquake Engineering Center Technical Report 159. Stanford Digital Repository. Available at: http://purl.stanford.edu/gz684zv9986
Collection
John A. Blume Earthquake Engineering Center Technical Report Series
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- Contact
- jabeec-email@stanford.edu
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