Numerical investigation of nonlinear static and dynamic behaviour of self-centring rocking segmental bridge piers
Numerical investigation of nonlinear static and dynamic behaviour of self-centring rocking segmental bridge piers
Accelerated Bridge Construction (ABC) philosophy has resulted in extensive developments of precast post-tensioned segmental (PPS) bridge piers in the bridge construction. Currently, there is a significant paucity in the literature on nonlinear mechanics and dynamics of PPS piers. Hence, this wok numerically investigates the nonlinear static and dynamic behaviour of PPS piers using a finite element (FE) framework. Nonlinear static and dynamic analyses are performed, and the results are compared for non-tapered and tapered PPS as well as cast-in-place (CIP) piers. It is found that post-tensioning force, aspect ratio, axial force of the pier, and number of segments highly affect nonlinear behaviour of the PPS piers. High levels of excitation amplitudes exhibit co-existing (high/low) amplitude responses at and around the resonant frequency of the PPS piers, and tapering enhances the probability of dynamic instability in the PPS pier. It is also shown that the fundamental mode of the PPS piers is similar to the first mode of a CIP bridge pier.
Precast post-tensioned segmental piers, Rocking mechanism, Accelerated bridge construction, Nonlinear dynamic, Rocking dynamic, Frequency response functions
1-14
Ahmadi, Ehsan
f1994ae0-2b3e-43c9-a595-032e801aae70
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
1 January 2020
Ahmadi, Ehsan
f1994ae0-2b3e-43c9-a595-032e801aae70
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
Ahmadi, Ehsan and Kashani, Mohammad
(2020)
Numerical investigation of nonlinear static and dynamic behaviour of self-centring rocking segmental bridge piers.
Soil Dynamics and Earthquake Engineering, 128, , [105876].
(doi:10.1016/j.soildyn.2019.105876).
Abstract
Accelerated Bridge Construction (ABC) philosophy has resulted in extensive developments of precast post-tensioned segmental (PPS) bridge piers in the bridge construction. Currently, there is a significant paucity in the literature on nonlinear mechanics and dynamics of PPS piers. Hence, this wok numerically investigates the nonlinear static and dynamic behaviour of PPS piers using a finite element (FE) framework. Nonlinear static and dynamic analyses are performed, and the results are compared for non-tapered and tapered PPS as well as cast-in-place (CIP) piers. It is found that post-tensioning force, aspect ratio, axial force of the pier, and number of segments highly affect nonlinear behaviour of the PPS piers. High levels of excitation amplitudes exhibit co-existing (high/low) amplitude responses at and around the resonant frequency of the PPS piers, and tapering enhances the probability of dynamic instability in the PPS pier. It is also shown that the fundamental mode of the PPS piers is similar to the first mode of a CIP bridge pier.
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16Oct_S0267726119307249-main
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More information
Accepted/In Press date: 26 September 2019
e-pub ahead of print date: 30 September 2019
Published date: 1 January 2020
Keywords:
Precast post-tensioned segmental piers, Rocking mechanism, Accelerated bridge construction, Nonlinear dynamic, Rocking dynamic, Frequency response functions
Identifiers
Local EPrints ID: 434923
URI: http://eprints.soton.ac.uk/id/eprint/434923
ISSN: 0267-7261
PURE UUID: ed16738b-3217-4103-bd44-0d920952cac0
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Date deposited: 16 Oct 2019 16:30
Last modified: 18 Mar 2024 03:40
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