Full-scale experimental investigations and numerical analysis of different innovative instrumented helical screw piles under axial and lateral monotonic and cyclic loadings
Yasser Abdelghany, M. Hesham El Naggar
In the proceedings of: GEO2010 Calgary: 63rd Canadian Geotechnical Conference & 6th Canadian Permafrost ConferenceSession: M1-C
ABSTRACT: The axial and lateral monotonic and cyclic behavior of helical pile foundations was investigated and new helical screw systems suitable for seismic loadings were developed. More than one hundred full scale field load tests were conducted on instrumented helical screw piles installed in cohesive soil. The piles included: plain helical screw piles (P-HSP); grouted (G-HSPs); fiber reinforced polymer FRP-G-HSPs; and reinforced grouted RG-HSPs. The RG-HSP piles axial capacity was more than twice that for P-HSP, with minimal reduction after cyclic loading, and their lateral capacity was more than 3 times the P-HSPs capacity. A 3-D finite element model was established.
RÉSUMÉ: Le comportement monotone axiale et latérale et cyclique des fondations sur pieux hélicoïdaux ont été étudiées et de nouveaux systèmes de vis hélicoïdale adaptée pour les charges sismiques ont été développés. Plus d'une centaine à la pleine échelle des tests de charge sur le terrain ont été effectués sur des pieux instrumentés vis hélicoïdale installés dans des sols cohérents. Les piles incluses: plaine pieux vis hélicoïdale (P-HSP); injectés (G-HSP); polymère renforcé de fibres de PRF-G-HSP et renforcé injectés RG-HSP. Les pieux RG-HSP capacité axiale a été deux fois plus que pour P-HSP, avec une réduction minimale après le chargement cyclique, et leur capacité latéral a été de plus de 3 fois la capacité P-HSP. Un modèle par éléments finis 3-D a été établi. 1. INTRODUCTION
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Yasser Abdelghany; M. Hesham El Naggar (2010) Full-scale experimental investigations and numerical analysis of different innovative instrumented helical screw piles under axial and lateral monotonic and cyclic loadings in GEO2010. Ottawa, Ontario: Canadian Geotechnical Society.
@article{GEO2010_042,
author = Yasser Abdelghany; M. Hesham El Naggar,
title = Full-scale experimental investigations and numerical analysis of different innovative instrumented helical screw piles under axial and lateral monotonic and cyclic loadings,
year = 2010
}
title = Full-scale experimental investigations and numerical analysis of different innovative instrumented helical screw piles under axial and lateral monotonic and cyclic loadings,
year = 2010
}