Determination of pedestrian loads in the presence of multi-modal lateral bridge vibrations
conference contribution
posted on 2015-11-12, 12:29authored byMateusz Bocian, J. H. G. Macdonald, J. F. Burn
Simultaneous excitation of multiple lateral modes due to pedestrian loading has been observed on the London
Millennium Footbridge and Clifton Suspension Bridge in the UK. However, all previous experimental studies aiming to
determine the pedestrian loading on laterally oscillating ground have focused on a single mode only. This shortcoming has arisen as a result of the lack of capability of previous experimental setups to deliver multi-mode vibrations. As a consequence, in
all existing modelling approaches, the results from tests in a single mode are assumed to be representative of pedestrian
behaviour universally. Therefore, uncertainty remains as to whether the predictions of dynamic structural behaviour from these
models can be trusted. To address this problem, tests have been conducted on a newly-developed instrumented treadmill
mounted on top of a hydraulically actuated base, allowing for treadmill motion representing simultaneous motion in multiple
bridge modes. This paper presents the results of these tests and relates them to the performance of the inverted pendulum pedestrian model previously shown to be capable of generating destabilising forces on the structure in multiple modes simultaneously.
History
Citation
Proceedings of Eurodyn 2014 – 9th International Conference on Structural Dynamics
Author affiliation
/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Engineering
Source
Eurodyn 2014 – 9th International Conference on Structural Dynamics, Porto, Portugal, 30 June-2 July 2014
Version
AM (Accepted Manuscript)
Published in
Proceedings of Eurodyn 2014 – 9th International Conference on Structural Dynamics
Publisher
European Association for Structural Dynamics
isbn
978-972-752-165-4
Acceptance date
2014-03-05
Copyright date
2014
Publisher version
http://www.easd.uth.gr/
Notes
The file associated with this record is under a permanent embargo while its copyright status is ascertained.