Experimental and Numerical Study on the Seismic Performance of Self-Centering Isolated Piers
Publication: Journal of Bridge Engineering
Volume 29, Issue 10
Abstract
A self-centering isolated pier (SIP) with an elliptical rocking interface is proposed to enhance the seismic performance of bridge piers. Pseudostatic tests were conducted on two SIPs (one with and the other without tie bars) to study their damage patterns and hysteretic characteristics. Additionally, a finite-element model of a SIP was constructed to study the effect of SIP parameters on its hysteretic characteristics, such as the long radius of the ellipse, the ratio of the long to the short radii of the ellipse, the distance from the tie bar to the centerline of the pier, and the axial compression ratio. The results indicated that the pier bodies of the two SIPs are in the elastic stage. Increasing the long radius of the ellipse and axial compression ratio can enhance the hysteretic characteristics of the SIP. However, these larger values could lead to yield failure of the pier bottom. Furthermore, an increase in the ratio of the long to the short radii of the ellipse results in a progressively less plump hysteretic curve for the SIP, leading to a reduction in energy dissipation capacity. Nevertheless, an increase in this ratio can improve the self-centering ability of SIPs. The distance from the tie bar to the centerline of the pier has little effect on hysteretic characteristics of the SIP.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request, such as the detailed information of the experimental results of the SIPs with and without tie bars, and numerical results of the SIPs.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant Number 51778022), Beijing Postdoctoral Research Foundation (Grant Number 2023-zz-137) and Young Teachers’ Research Ability Enhancement Program of Beijing University of Civil Engineering and Architecture (Grant Number X23006).
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 29 • Issue 10 • October 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Sep 7, 2023
Accepted: Feb 23, 2024
Published online: Jul 22, 2024
Published in print: Oct 1, 2024
Discussion open until: Dec 22, 2024
ASCE Technical Topics:
- Analysis (by type)
- Base isolation
- Coasts, oceans, ports, and waterways engineering
- Compression
- Continuum mechanics
- Design (by type)
- Dynamics (solid mechanics)
- Earthquake engineering
- Engineering fundamentals
- Engineering mechanics
- Finite element method
- Geotechnical engineering
- Hydraulic engineering
- Hydraulic structures
- Methodology (by type)
- Numerical analysis
- Numerical methods
- Piers
- Ports and harbors
- Seismic design
- Seismic effects
- Seismic tests
- Solid mechanics
- Structural design
- Structural dynamics
- Structural engineering
- Structures (by type)
- Tests (by type)
- Water and water resources
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