000012579 001__ 12579
000012579 005__ 20160920162630.0
000012579 04107 $$aeng
000012579 046__ $$k2016-09-05
000012579 100__ $$aNimmen, K. Van
000012579 24500 $$aDynamic performance of a footbridge with tuned mass dampers exposed to pedestrian traffic

000012579 24630 $$n6.$$pInsights and Innovations in Structural Engineering, Mechanics and Computation
000012579 260__ $$bTaylor and Francis Group, London, UK
000012579 506__ $$arestricted
000012579 520__ $$2eng$$aThe present contribution evaluates the dynamic behaviour of a slender steel footbridge before and after installation of two Tuned Mass Dampers (TMDs). The experimental study shows that the damping devices lead to an increase of the effective damping ratio of the critical mode. Additional tests involving the structural vibrations induced by a limited number of persons, demonstrate that the TMD units are effective in reducing the structural response. However, the obtained reduction highly depends on the type of human excitation. To verify the response of the footbridge for large groups of pedestrians and crowds, a comprehensive numerical analysis is performed. It is demonstrated that the effectiveness of the damping devices is considerably less than what is expected based on the corresponding increase in effective damping ratio. This is due to the fact that crowd-induced loading is near-harmonic and transientas opposed to harmonic and the fact that the critical mode is now highly damped and no longer dominates the structural response.

000012579 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000012579 653__ $$a

000012579 7112_ $$aSixth International Conference on Structural Engineering, Mechanics and Computation$$cCape Town, South Africa$$d2016-09-05 / 2016-09-07$$gSEMC2016
000012579 720__ $$aNimmen, K. Van$$iLombaert, G.$$iRoeck, G. De$$iBroeck, P. Van den
000012579 8560_ $$ffischerc@itam.cas.cz
000012579 8564_ $$s1080966$$uhttps://invenio.itam.cas.cz/record/12579/files/027.pdf$$yOriginal version of the author's contribution as presented on CD, 027.pdf.
000012579 962__ $$r12552
000012579 980__ $$aPAPER