MATEC Web of Conferences
Volume 24, 2015EVACES’15, 6th International Conference on Experimental Vibration Analysis for Civil Engineering Structures
|Number of page(s)||7|
|Section||Vibration model verification|
|Published online||19 October 2015|
Experimental and numerical response of rigid slender blocks with geometrical defects under seismic excitation
1 Laboratory of seismic mechanics CEA/DEN/DANS/DM2S/SEMT/EMSI 91 191 Gif-sur-Yvette, France
2 Institut Pascal UMR 6602 CNRS/UBP/IFMA BP 80 026, 63 171, Aubière, France
3 ISTerre, Université de Grenoble-Alpes CNRS/IRD/IFSTTAR BP 53, 38 041, Grenoble, France
a Corresponding author: firstname.lastname@example.org
The present work investigates on the influence of small geometrical defects on the behavior of slender rigid blocks. A comprehensive experimental campaign was carried out on one of the shake tables of CEA/Saclay in France. The tested model was a massive steel block with standard manufacturing quality. Release, free oscillations tests as well as shake table tests revealed a non-negligible out-of-plane motion even in the case of apparently plane initial conditions or excitations. This motion exhibits a highly reproducible part for a short duration that was used to calibrate a numerical geometrically asymmetrical model. The stability of this model when subjected to 2 000 artificial seismic horizontal bidirectional signals was compared to the stability of a symmetrical one. This study showed that the geometrical imperfections slightly increase the rocking and overturning probabilities under bidirectional seismic excitations in a narrow range of peak ground acceleration.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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