Bocian, M., Brownjohn, J.M.W., Racic, V. et al. (3 more authors) (2016) A framework for experimental determination of localised vertical pedestrian forces on full-scale structures using wireless attitude and heading reference systems. Journal of Sound and Vibration, 376. pp. 217-243. ISSN 0022-460X
Abstract
A major weakness among loading models for pedestrians walking on flexible structures proposed in recent years is the various uncorroborated assumptions made in their development. This applies to spatio-temporal characteristics of pedestrian loading and the nature of multi-object interactions. To alleviate this problem, a framework for the determination of localised pedestrian forces on full-scale structures is presented using a wireless attitude and heading reference systems (AHRS). An AHRS comprises a triad of tri-axial accelerometers, gyroscopes and magnetometers managed by a dedicated data processing unit, allowing motion in three-dimensional space to be reconstructed. A pedestrian loading model based on a single point inertial measurement from an AHRS is derived and shown to perform well against benchmark data collected on an instrumented treadmill. Unlike other models, the current model does not take any predefined form nor does it require any extrapolations as to the timing and amplitude of pedestrian loading. In order to assess correctly the influence of the moving pedestrian on behaviour of a structure, an algorithm for tracking the point of application of pedestrian force is developed based on data from a single AHRS attached to a foot. A set of controlled walking tests with a single pedestrian is conducted on a real footbridge for validation purposes. A remarkably good match between the measured and simulated bridge response is found, indeed confirming applicability of the proposed framework.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | Loading from walking pedestrians; Force location tracking; Human–structure interaction; Wireless sensor network; Vibration serviceability of structures; Pedestrian dead reckoning |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 13 Jul 2016 10:38 |
Last Modified: | 13 Jul 2016 10:43 |
Published Version: | http://dx.doi.org/10.1016/j.jsv.2016.05.010 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.jsv.2016.05.010 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:102400 |