Ahmadi, Ehsan, Caprani, Colin, Živanović, Stana, Evans, Neil D. and Heidarpour, Amin (2018) A framework for quantification of human-structure interaction in vertical direction. Journal of Sound and Vibration, 432 . pp. 351-372. doi:10.1016/j.jsv.2018.06.054 ISSN 0022-460X.
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Abstract
In lightweight structures, there is increasing evidence of the existence of interaction between pedestrians and structures, now commonly termed pedestrian-structure interaction. The presence of a walker can alter the dynamic characteristics of the human-structure system compared with those inherent to the empty structure. Conversely, the response of the structure can influence human behaviour and hence alter the applied loading. In the past, most effort on determining the imparted footfall-induced vertical forces to the walking surface has been conducted using rigid, non-flexible surfaces such as treadmills. However, should the walking surface be vibrating, the characteristics of human walking could change to maximize comfort. Knowledge of pedestrian-structure interaction effects is currently limited, and it is often quoted as a reason for our inability to predict vibration response accurately. This work aims to quantify the magnitude of human-structure interaction through an experimental-numerical programme on a full-scale lively footbridge. An insole pressure measurement system was used to measure the human-imparted force on both rigid and lively surfaces. Test subjects, walking at different pacing frequencies, took part in the test programme to infer the existence of the two forms of human-structure interaction. Parametric statistical hypothesis testing provides evidence on the existence of human-structure interaction. In addition, a non-parametric test (Monte Carlo simulation) is employed to quantify the effects of numerical model error on the identified human-structure interaction forms. It is concluded that human-structure interaction is an important phenomenon that should be considered in the design and assessment of vibration-sensitive structures.
| Item Type: | Journal Article |
|---|---|
| Subjects: | T Technology > TG Bridge engineering |
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering |
| Library of Congress Subject Headings (LCSH): | Structural dynamics, Lightweight construction, Footbridges -- Design and construction, Footbridges -- Vibration, Structural analysis (Engineering) |
| Journal or Publication Title: | Journal of Sound and Vibration |
| Publisher: | Elsevier Ltd. |
| ISSN: | 0022-460X |
| Official Date: | 13 October 2018 |
| Dates: | Date Event 13 October 2018 Published 30 June 2018 Available 22 June 2018 Accepted |
| Volume: | 432 |
| Page Range: | pp. 351-372 |
| DOI: | 10.1016/j.jsv.2018.06.054 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| Date of first compliant deposit: | 13 July 2018 |
| Date of first compliant Open Access: | 30 June 2019 |
| Funder: | Monash-Warwick Alliance Seed Grant, Monash Graduate Scholarship |
| RIOXX Funder/Project Grant: | Project/Grant ID RIOXX Funder Name Funder ID Seed Grant Monash-Warwick Alliance UNSPECIFIED |
| URI: | https://wrap.warwick.ac.uk/103971/ |
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