000015636 001__ 15636
000015636 005__ 20161115135325.0
000015636 04107 $$aeng
000015636 046__ $$k2013-06-12
000015636 100__ $$aRacic, V.
000015636 24500 $$aDynamic Loading Factors of Individual Jogging Forces

000015636 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015636 260__ $$bNational Technical University of Athens, 2013
000015636 506__ $$arestricted
000015636 520__ $$2eng$$aWith increasingly popular marathon events in urban environments, such as in London and New York City, structural designers are faced with a great deal of uncertainty when assessing dynamic performance of bridges occupied and dynamically excited by people running. While the dynamic loads induced by people walking have been intensively studied since the infamous lateral sway of the London Millennium Bridge in 2000, reliable and practical descriptions of running excitation are still very rare and limited. This paper makes a step forward by bringing together a unique database of individual jogging force records and their simple mathematical model which can be used in everyday design practice. The forcing data has been collected in Vibration Engineering Section Laboratory in the University of Sheffield using a state-of-the-art instrumented treadmill, which is commonly used in clinical studies of human gait and sports biomechanics. The modelling strategy featuring Fourier harmonics of measured jogging force-time histories is adopted from a popular design guidelines for human walking excitation of structures. The results show a great scatter in the DLF data and no strong link with jogging footfall rate, which is the case with walking forces. This clearly suggests that traditional deterministic Fourier based approach is not the best modelling strategy for jogging loading. Uncertainty and inter-personal randomness of the force amplitudes indicate that stochastic - rather than deterministic models of jogging forces should provide more reliable predictions of the bridge dynamics. These forces could be modeled in a similar fashion as other key dynamic loading of structures characterized by great randomness and uncertainty, such as wind and earthquake.

000015636 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015636 653__ $$ahuman-induced vibrations, footbridges, running, dynamic loading.

000015636 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015636 720__ $$aRacic, V.$$iBrownjohn, J.$$iPavic, A.
000015636 8560_ $$ffischerc@itam.cas.cz
000015636 8564_ $$s379796$$uhttps://invenio.itam.cas.cz/record/15636/files/1180.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 38 HUMAN INDUCED VIBRATIONS
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000015636 962__ $$r15525
000015636 980__ $$aPAPER