Numerical Parametric Study of Railway Self-Centering Piers with Partially Unbonded Longitudinal Reinforcement

DOI

10.2991/978-94-6239-740-8_16How to use a DOI?

Keywords

Unbonded Reinforcement; Railway Self-Centering Piers; Numerical Simulation; Parametric Study

Abstract

With the continuous expansion of railway construction in China and the increasing demand for seismic disaster prevention, the seismic performance of bridge piers has received growing attention. Self-centering piers can effectively mitigate seismic damage and control residual deformation, showing considerable potential for engineering applications. However, most existing self-centering piers rely on unbonded prestressing tendons to provide restoring force, which may suffer from prestress loss during long-term service. In addition, the high initial stiffness required for high-speed railway bridges limits the application of conventional self-centering piers in railway engineering. To address these issues, a railway self-centering pier with partially unbonded longitudinal reinforcement is proposed. Numerical simulations were carried out using the OpenSees finite element platform to investigate the key parameters affecting its dynamic response. Two parameters, namely unbonded length and pedestal width, were considered, and their effects on dynamic response indices, including pier-top acceleration and pier-top relative displacement, were systematically analyzed. The results show that an appropriate increase in unbonded length can reduce the seismic response of the structure to a certain extent, although the improvement remains limited. In contrast, an excessively large pedestal width significantly amplifies the seismic response, which is unfavorable to the seismic performance of the pier.

Copyright

© 2026 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Mingbo Ding
AU  - Zongxiang Hu
AU  - Jinhua Lu
AU  - Yuan Yao
PY  - 2026
DA  - 2026/08/14
TI  - Numerical Parametric Study of Railway Self-Centering Piers with Partially Unbonded Longitudinal Reinforcement
BT  - Proceedings of the 2026 9th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA 2026)
PB  - Atlantis Press
SP  - 172
EP  - 183
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6239-740-8_16
DO  - 10.2991/978-94-6239-740-8_16
ID  - Ding2026
ER  -