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Nonlinear seismic fragility analysis of a resilient precast post-tensioned segmental bridge pier

Nonlinear seismic fragility analysis of a resilient precast post-tensioned segmental bridge pier
Nonlinear seismic fragility analysis of a resilient precast post-tensioned segmental bridge pier
The use of precast post-tensioned segmental (PPS) piers is growing in bridge industry, particularly in Accelerated Bridge Construction (ABC). The PPS piers provides durable, low-maintenance and demountable accelerated bridge construction technique that could be resilient to natural hazards. To expand their application in seismic regions, it is essential to investigate the behaviour of the PPS piers subject to various types of ground motions. Hence, this study focuses on the seismic performance of the PPS piers under pulse-like near-field earthquakes. Two ensembles of 40 pulse-like near-field ground motions and 44 far-field ground motions along with three bridge piers of various heights are used in a series of incremental dynamic analyses. The piers are analysed under the original pulse-like near-field ground motions, their extracted pulse ground motions, and their corresponding non-pulse ground motions, in which the pulse ground motions are subtracted from the original ground motions. It is found that the effect of the pulse ground motion is pronounced, when the pulse period is in close proximity to the natural period of the pier (linear period prior to rocking). However, when the pulse period is far from the natural period of the pier, the effect of the pulse ground motion is negligible, and the non-pulse ground motion is a good representative of the original ground motion. It is also seen that pulse-like near-field and far-field ground motions generally have similar effects on the response of PPS piers.
Precast post-tensioned segmental columns, ; resilience-based design, accelerated bridge construction, incremental dynamic analysis, pulse-like near-field ground motions, seismic performance assessment
2378-9697
Ahmadi, Ehsan
f1994ae0-2b3e-43c9-a595-032e801aae70
Kocakaplan, Sedef
8dafcb6f-9cba-4fbc-9406-0bc4dcaf36ab
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
Ahmadi, Ehsan
f1994ae0-2b3e-43c9-a595-032e801aae70
Kocakaplan, Sedef
8dafcb6f-9cba-4fbc-9406-0bc4dcaf36ab
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d

Ahmadi, Ehsan, Kocakaplan, Sedef and Kashani, Mohammad (2022) Nonlinear seismic fragility analysis of a resilient precast post-tensioned segmental bridge pier. Sustainable and Resilient Infrastructure.

Record type: Article

Abstract

The use of precast post-tensioned segmental (PPS) piers is growing in bridge industry, particularly in Accelerated Bridge Construction (ABC). The PPS piers provides durable, low-maintenance and demountable accelerated bridge construction technique that could be resilient to natural hazards. To expand their application in seismic regions, it is essential to investigate the behaviour of the PPS piers subject to various types of ground motions. Hence, this study focuses on the seismic performance of the PPS piers under pulse-like near-field earthquakes. Two ensembles of 40 pulse-like near-field ground motions and 44 far-field ground motions along with three bridge piers of various heights are used in a series of incremental dynamic analyses. The piers are analysed under the original pulse-like near-field ground motions, their extracted pulse ground motions, and their corresponding non-pulse ground motions, in which the pulse ground motions are subtracted from the original ground motions. It is found that the effect of the pulse ground motion is pronounced, when the pulse period is in close proximity to the natural period of the pier (linear period prior to rocking). However, when the pulse period is far from the natural period of the pier, the effect of the pulse ground motion is negligible, and the non-pulse ground motion is a good representative of the original ground motion. It is also seen that pulse-like near-field and far-field ground motions generally have similar effects on the response of PPS piers.

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Accepted/In Press date: 2022
Published date: 18 May 2022
Keywords: Precast post-tensioned segmental columns, ; resilience-based design, accelerated bridge construction, incremental dynamic analysis, pulse-like near-field ground motions, seismic performance assessment

Identifiers

Local EPrints ID: 457584
URI: http://eprints.soton.ac.uk/id/eprint/457584
ISSN: 2378-9697
PURE UUID: b37ce31f-dff9-4578-a844-e1d3d8a74ca1
ORCID for Mohammad Kashani: ORCID iD orcid.org/0000-0003-0008-0007

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Date deposited: 13 Jun 2022 16:48
Last modified: 30 Nov 2022 05:01

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Contributors

Author: Ehsan Ahmadi
Author: Sedef Kocakaplan

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