Freddi, Fabio;
Shen, Yu;
Li, Jianzhong;
Li, Yongxing;
(2022)
Seismic Design and Performance Assessment of the Post-tensioned Bridge Piers.
In: Cimellaro, Gian Paolo, (ed.)
Seismic Isolation, Energy Dissipation and Active Vibration Control of Structures.
(pp. pp. 438-446).
Springer Nature
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Abstract
Post-tensioned (PT) rocking piers have emerged as a promising solution for bridge substructures, significantly increasing their seismic performance and resilience. These piers are characterized by unbonded PT tendon and energy dissipation (ED) components providing, respectively, self-centering and dissipating capacities. Despite the potential advantages, their practical applications are still limited due to the lack of design standards and guidelines. In this context, developing a simple design procedure represents an essential step in making the use of such systems more accessible to the bridge design community. The present study introduces a design procedure for PT bridge piers by defining a performance index λ related to both initial PT force level and ED device amount. The design process is based on the improvement of a conventional monolithic bridge pier (i.e., similar dimensions and steel amount with superior self-centering behavior and load resistance). For illustration purposes, the design procedure is applied to a case study bridge pier, and its seismic performance is compared with the corresponding conventional monolithic pier. The results show that a PT bridge pier that satisfies the design objectives of residual drift and lateral force (i.e., superior self-centering behavior and load resistance) can be conceived and designed through the proposed simple design approach.
| Type: | Proceedings paper |
|---|---|
| Title: | Seismic Design and Performance Assessment of the Post-tensioned Bridge Piers |
| Event: | 17th World Conference on Base Seismic Isolation (WCSI) |
| Location: | Turin, Italy |
| Dates: | 11th-15th September 2022 |
| ISBN-13: | 978-3-031-21187-4 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1007/978-3-031-21187-4_36 |
| Publisher version: | https://doi.org/10.1007/978-3-031-21187-4_36 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| Keywords: | bridge engineering, unbonded post-tensioned piers, performance index, seismic, design approach |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10195481 |
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