Postearthquake Analysis of a Piled Foundation
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 139, Issue 10
Abstract
On December 13, 1990, a moderate earthquake ( and MKS intensity equal to VII) struck the southern part of eastern Sicily causing intense damage in some localized areas and the loss of 19 human lives. At Augusta, which has soft-soil conditions, amplification phenomena were observed, and RC frame buildings based on piles were severely damaged. Because seismic regulations were not enforced in the area during construction, the buildings were designed only for static loads. An investigation was conducted on the superstructures, soil, and piled foundations for evaluating the potential to repair and retrofit these buildings. The site has been subjected to extensive soil investigations. Loading tests on single piles and a three-pile group were conducted to test the integrity of the piles after the seismic event. To simulate the behavior of piles subjected to both inertial and kinematic effects resulting from the earthquake, a pseudostatic pushover analysis was carried out. Seismic loading was evaluated by a deterministic approach based on accelerograms measured during the earthquake. Because the load-bearing capacity of the existing foundation was insufficient to resist the design seismic loading, retrofitting of the piled foundation required the enlargement of the foundation and new bored piles.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 139 • Issue 10 • October 2013
Pages: 1822 - 1827
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Nov 17, 2011
Accepted: Feb 1, 2013
Published online: Feb 4, 2013
Published in print: Oct 1, 2013
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