Behavior of rigid blocks with geometrical defects under seismic motion: an experimental and numerical study

Charlie Mathey 1 Cyril Feau 2, * Ioannis Politopoulos 3 David Clair 4 Laurent Baillet Michel Fogli 5
* Corresponding author
1 ENS Cachan - École normale supérieure - Cachan
2 CEA-DEN - CEA-Direction de l'Energie Nucléaire
3 EMSI - Laboratoire d'Etudes de Mécanique Sismique
SEMT - Service d'Etudes Mécaniques et Thermiques : DEN/DM2S/SEMT
4 LAMI - Laboratoire de Mécanique et Ingénieries
5 Laboratory of Research and Applications in Advanced Mechanics, French Institute of Advanced Mechanics and Blaise Pascal University
Abstract : the present work investigates 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 2000 artificial seismic horizontal bidirectional signals was compared with the stability of a symmetrical one. This study showed that the geometrical imperfections slightly increase the rocking and overturning probabilities for earthquake signals in a narrow range of peak ground acceleration.
Keywords : defects rocking rigid block
Document type :
Journal articles
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https://hal-cea.archives-ouvertes.fr/cea-02382950
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Submitted on : Wednesday, November 27, 2019 - 2:35:02 PM
Last modification on : Friday, November 29, 2019 - 2:32:26 AM

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CEA | ENS-CACHAN | INSTITUT_PASCAL | DEN | CEA-UPSAY | SIGMA-CLERMONT | DEN-SACLAY | PRES_CLERMONT | UNIV-PARIS-SACLAY

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Charlie Mathey, Cyril Feau, Ioannis Politopoulos, David Clair, Laurent Baillet, et al.. Behavior of rigid blocks with geometrical defects under seismic motion: an experimental and numerical study. unknown, 2016, 45 (15), pp.2455-2474. ⟨10.1002/eqe.2773⟩. ⟨cea-02382950⟩

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