Auto-parametric multi-modal vibration of a continuous slender structure due to seismic excitation

0431463 - ÚTAM 2015 RIV TR eng O - Others
Náprstek, Jiří - Fischer, Cyril
Auto-parametric multi-modal vibration of a continuous slender structure due to seismic excitation.
Proceedings of the second European conference on earthquake engineering and seismology. Istanbul, 2014. s. 235
R&D Projects: GA ČR(CZ) GC13-34405J
Institutional support: RVO:68378297
Keywords : non-linear dynamic effects * slender structures * seismic excitation
Subject RIV: JM - Building Engineering
http://www.eaee.org/Media/Default/2ECCES/2ecces_eaee/126.pdf

Non-linear dynamic effects are the most dangerous processes endangering structures during a seismic attack. Among them, auto-parametric non-linear vibration in state of post-critical auto-parametric resonance can lead to collapse particularly in case of high slender systems or large dynamically sensitive structures. The main cause of these effects is a strong vertical component of an earthquake excitation in epicentre area. In sub-critical linear regime vertical and horizontal response components are independent and therefore no horizontal response component is observed in such case. If the amplitude of a vertical excitation in a structure foundation exceeds a certain limit, a vertical response component loses dynamic stability; dominant horizontal response component arises and can lead to failure of the structure.
Permanent Link: http://hdl.handle.net/11104/0236051