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Characterization of the Lateral Response of Base Rocking Steel Bridge Piers
In light of the need to mitigate direct and indirect losses due to earthquakes, research in the recent decades has focused on the development of high-performance seismic resisting systems that possess a high level of protection and sustain minimal structural damage during an earthquake. Rocking structures are amongst such technologies that have garnered a great deal of attention. This paper summarizes the results of an experimental program on the lateral cyclic behaviour of post-tensioned rocking steel bridge column specimens designed to rock at the interface with the foundation. The effect of column wall thickness, presence of a base plate and supplemental energy dissipation devices is briefly discussed. The finite element (FE) simulation procedure and verification of 3D continuum models of the tested specimens are presented. It is shown that the FE method is able to accurately predict the cyclic response of the system. Then, the model is simplified for a parametric study to characterize the lateral cyclic response of the system. The varied parameters are diameter and thickness of the tube, diameter and thickness of the base plate, initial axial force ratio due to superstructure load, cross-sectional area of the tendon, and the amount of posttensioning force. It is demonstrated that cyclic performance of the system is dependent on the total initial axial force and diameter-to-thickness ratio of the tube. By proper selection of these two parameters, local buckling can be avoided, and the system is able to maintain its self-centering property in multiple earthquakes.
Characterization of the Lateral Response of Base Rocking Steel Bridge Piers
In light of the need to mitigate direct and indirect losses due to earthquakes, research in the recent decades has focused on the development of high-performance seismic resisting systems that possess a high level of protection and sustain minimal structural damage during an earthquake. Rocking structures are amongst such technologies that have garnered a great deal of attention. This paper summarizes the results of an experimental program on the lateral cyclic behaviour of post-tensioned rocking steel bridge column specimens designed to rock at the interface with the foundation. The effect of column wall thickness, presence of a base plate and supplemental energy dissipation devices is briefly discussed. The finite element (FE) simulation procedure and verification of 3D continuum models of the tested specimens are presented. It is shown that the FE method is able to accurately predict the cyclic response of the system. Then, the model is simplified for a parametric study to characterize the lateral cyclic response of the system. The varied parameters are diameter and thickness of the tube, diameter and thickness of the base plate, initial axial force ratio due to superstructure load, cross-sectional area of the tendon, and the amount of posttensioning force. It is demonstrated that cyclic performance of the system is dependent on the total initial axial force and diameter-to-thickness ratio of the tube. By proper selection of these two parameters, local buckling can be avoided, and the system is able to maintain its self-centering property in multiple earthquakes.
Characterization of the Lateral Response of Base Rocking Steel Bridge Piers
Lecture Notes in Civil Engineering
Walbridge, Scott (editor) / Nik-Bakht, Mazdak (editor) / Ng, Kelvin Tsun Wai (editor) / Shome, Manas (editor) / Alam, M. Shahria (editor) / el Damatty, Ashraf (editor) / Lovegrove, Gordon (editor) / Rahmzadeh, A. (author) / Alam, M. S. (author) / Tremblay, R. (author)
Canadian Society of Civil Engineering Annual Conference ; 2021
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2021 ; Chapter: 46 ; 545-552
2022-04-14
8 pages
Article/Chapter (Book)
Electronic Resource
English
Dynamic seismic response of controlled rocking bridge steel-truss piers
| Online Contents | 2008
Dynamic seismic response of controlled rocking bridge steel-truss piers
| Online Contents | 2008