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Experimental investigation of a novel class of self-centring spinal rocking column

Experimental investigation of a novel class of self-centring spinal rocking column
Experimental investigation of a novel class of self-centring spinal rocking column
This paper explores a proof of concept self-centring spinal column concept experimentally. The idea of the system is inspired by the mechanical interaction of the vertebral bones and intervertebral discs in human spine. Experimental tests are undertaken to explore whether a similar bridge pier system could be constructed to withstand seismic dynamic loading in an equally efficient manner. The experimentation is performed on tied (pre-tensioned) wooden blocks (vertebrae) with and without rubber strips between the vertebrae acting as the intervertebral discs. Small-scale test specimens are excited sinusoidally using a small-scale shake table, and the response of the system recorded through triaxial accelerometers attached to the structure. The nonlinear dynamic response and mechanics of the system are then investigated under sinusoidal dynamic excitation. It is found that the integration of intervertebral rubber discs into wooden vertebrae reduces the nonlinearity of the system, and increases the flexibility and damping. The experimental results show that the proposed system can sustain large lateral displacement without any residual deformation after the excitation.
Rocking column, Accelerated bridge construction, Vertebral bridge pier, Backbone curve, Nonlinear dynamics, Frequency Response Function
0022-460X
308-324
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
Gonzalez-Buelga, Alicia
24a77867-2776-4a13-84c9-1ff2a7f0f1de
Thayalan, Rachael
1d442b16-1b9e-433d-95c1-ed6ad9308bf5
Thomas, Alistair
7c85bbf2-92ec-4e8a-8591-8ede8406ac0a
Alexander, Nicholas
1427c28c-d5ed-4b3f-a40d-6a4c6be67c6b
Kashani, Mohammad
d1074b3a-5853-4eb5-a4ef-7d741b1c025d
Gonzalez-Buelga, Alicia
24a77867-2776-4a13-84c9-1ff2a7f0f1de
Thayalan, Rachael
1d442b16-1b9e-433d-95c1-ed6ad9308bf5
Thomas, Alistair
7c85bbf2-92ec-4e8a-8591-8ede8406ac0a
Alexander, Nicholas
1427c28c-d5ed-4b3f-a40d-6a4c6be67c6b

Kashani, Mohammad, Gonzalez-Buelga, Alicia, Thayalan, Rachael, Thomas, Alistair and Alexander, Nicholas (2018) Experimental investigation of a novel class of self-centring spinal rocking column. Journal of Sound and Vibration, 437, 308-324. (doi:10.1016/j.jsv.2018.08.034).

Record type: Article

Abstract

This paper explores a proof of concept self-centring spinal column concept experimentally. The idea of the system is inspired by the mechanical interaction of the vertebral bones and intervertebral discs in human spine. Experimental tests are undertaken to explore whether a similar bridge pier system could be constructed to withstand seismic dynamic loading in an equally efficient manner. The experimentation is performed on tied (pre-tensioned) wooden blocks (vertebrae) with and without rubber strips between the vertebrae acting as the intervertebral discs. Small-scale test specimens are excited sinusoidally using a small-scale shake table, and the response of the system recorded through triaxial accelerometers attached to the structure. The nonlinear dynamic response and mechanics of the system are then investigated under sinusoidal dynamic excitation. It is found that the integration of intervertebral rubber discs into wooden vertebrae reduces the nonlinearity of the system, and increases the flexibility and damping. The experimental results show that the proposed system can sustain large lateral displacement without any residual deformation after the excitation.

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1-s2.0-S0022460X18305406-main - Accepted Manuscript
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More information

Accepted/In Press date: 16 August 2018
e-pub ahead of print date: 10 September 2018
Published date: 22 December 2018
Keywords: Rocking column, Accelerated bridge construction, Vertebral bridge pier, Backbone curve, Nonlinear dynamics, Frequency Response Function

Identifiers

Local EPrints ID: 424225
URI: http://eprints.soton.ac.uk/id/eprint/424225
ISSN: 0022-460X
PURE UUID: f00d1fc5-f104-4d61-9cab-7ef55166d87d
ORCID for Mohammad Kashani: ORCID iD orcid.org/0000-0003-0008-0007

Catalogue record

Date deposited: 05 Oct 2018 11:35
Last modified: 07 Oct 2020 05:23

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Contributors

Author: Alicia Gonzalez-Buelga
Author: Rachael Thayalan
Author: Alistair Thomas
Author: Nicholas Alexander

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