Number of the records: 1
Dynamic stability loss and post-critical behaviour of an auto-parametric non-linear system with three degrees of freedom
- 1.
SYSNO ASEP 0399324 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Dynamic stability loss and post-critical behaviour of an auto-parametric non-linear system with three degrees of freedom Author(s) Náprstek, Jiří (UTAM-F) RID, ORCID, SAI
Fischer, Cyril (UTAM-F) RID, SAI, ORCIDNumber of authors 2 Source Title COMPDYN 2009, ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering. - Atény : National Technical University of Athens, 2009 / Papadrakakis M. ; Lagaros N.D. ; Fragiadakis M. - ISBN 978-960-254-682-6 Number of pages 18 s. Publication form Medium - C Action COMPDYN 2009 Event date 22.06.2009-24.06.2009 VEvent location Rhodos Country GR - Greece Event type WRD Language eng - English Country GR - Greece Keywords dynamic stability ; auto-parametric response ; non-linear dynamics ; semi-trivial solution Subject RIV JM - Building Engineering R&D Projects IAA200710805 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GA103/09/0094 GA ČR - Czech Science Foundation (CSF) IAA200710902 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) Institutional support UTAM-F - RVO:68378297 Annotation Slender structures exposed to a strong vertical component of an earthquake excitation are endangered by auto-parametric resonance effect. This non-linear dynamic process in a post-critical regime caused heavy damages or collapses of many towers, bridges and other structures due to earthquake attack in the epicenter area. If an amplitude of a vertical harmonic excitation in a structure foundation exceeds a certain limit, vertical response on the structure top looses its stability and a dominant horizontal response component arises. In subcritical linear regime only semi-trivial solution being represented by the vertical response component is observed, while horizontal components remain trivial. Therefore, vertical and horizontal response components are independent. In post-critical regime (auto-parametric resonance) the dynamic non-linear interaction of vertical and horizontal response components occurs. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2014
Number of the records: 1