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A new approach to model rocking motion of post-tensioned segmental columns

A new approach to model rocking motion of post-tensioned segmental columns
A new approach to model rocking motion of post-tensioned segmental columns
Application of post-tensioned segmental columns are increasing in accelerated bridge construction, where rocking motion of the segments results in lateral displacement of the column and the post-tensioning tendon provides self-centering capacity of the system. Analytical solution of such system is very complex as the equations of rocking motion are highly nonlinear, and it is almost impossible to solve such systems for seismic excitations. Furthermore, using finite element-based software such as ABAQUS and ANSYS make the dynamic analysis very time consuming and, so computationally inefficient. Therefore, this paper introduces a new technique for modelling of post-tensioned segmental columns in OpenSees program, which is computationally efficient, and exhibits a good agreement with analytical approaches and experimental results. Using the developed model, the frequency response function and seismic response of an exemplary column are extracted which exhibits a lower and an upper branch around the resonance.
Post-tensioned segmental columns, Rocking motion, Accelerated bridge construction, Numerical modelling
2311-9020
1634-1641
The European Association for Structural Dynamics
Ahmadi, Ehsan
f1994ae0-2b3e-43c9-a595-032e801aae70
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
Papadrakakis, Manolis
Fragiadakis, Michalis
Papadimitriou, Costas
Ahmadi, Ehsan
f1994ae0-2b3e-43c9-a595-032e801aae70
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
Papadrakakis, Manolis
Fragiadakis, Michalis
Papadimitriou, Costas

Ahmadi, Ehsan and Kashani, Mohammad (2020) A new approach to model rocking motion of post-tensioned segmental columns. Papadrakakis, Manolis, Fragiadakis, Michalis and Papadimitriou, Costas (eds.) In EURODYN 2020 - 11th International Conference on Structural Dynamics, Proceedings. vol. 1, The European Association for Structural Dynamics. pp. 1634-1641 .

Record type: Conference or Workshop Item (Paper)

Abstract

Application of post-tensioned segmental columns are increasing in accelerated bridge construction, where rocking motion of the segments results in lateral displacement of the column and the post-tensioning tendon provides self-centering capacity of the system. Analytical solution of such system is very complex as the equations of rocking motion are highly nonlinear, and it is almost impossible to solve such systems for seismic excitations. Furthermore, using finite element-based software such as ABAQUS and ANSYS make the dynamic analysis very time consuming and, so computationally inefficient. Therefore, this paper introduces a new technique for modelling of post-tensioned segmental columns in OpenSees program, which is computationally efficient, and exhibits a good agreement with analytical approaches and experimental results. Using the developed model, the frequency response function and seismic response of an exemplary column are extracted which exhibits a lower and an upper branch around the resonance.

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Accepted/In Press date: 1 September 2020
Published date: 2020
Venue - Dates: 11th International Conference on Structural Dynamics, EURODYN 2020, , Virtual, Athens, Greece, 2020-11-23 - 2020-11-26
Keywords: Post-tensioned segmental columns, Rocking motion, Accelerated bridge construction, Numerical modelling

Identifiers

Local EPrints ID: 446416
URI: http://eprints.soton.ac.uk/id/eprint/446416
ISSN: 2311-9020
PURE UUID: 9ca8da52-9962-4c74-91a1-8864ce9ef239
ORCID for Mohammad Kashani: ORCID iD orcid.org/0000-0003-0008-0007

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Date deposited: 08 Feb 2021 17:31
Last modified: 28 Apr 2022 02:19

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Contributors

Author: Ehsan Ahmadi
Editor: Manolis Papadrakakis
Editor: Michalis Fragiadakis
Editor: Costas Papadimitriou

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