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Project Number 128
Date of Summary March 31, 1991
Subject Response of Piles to Earthquake Ground Motions
Performing Activity University of Houston
Principal Investigator Dr. Michael O'Neill
Contracting Agency Minerals Management Service
Estimated Completion Complete
Description This was a Joint Industry Project (JIP) consisting of the MMS and four industry participants. The objective of this study was to develop engineering guidelines to verify the holding capacity of a pile foundation for an offshore structure subject to a strong earthquake ground motions. The project simulated the response of axially-loaded piles in a specially designed test pit that allows actual data from recorded earthquakes to be used as forcing functions. The concern is if the seismic motion produces loss of capacity of the pile foundation during or after a period of strung-ground shaking. A series of controlled laboratory tests will be conducted on model pile segments that are loaded with a static uplift bias and that are simultaneously subject to seismic excitation through the soil. The ground acceleration time histories will be from the SEMS unit in Project No. 68.
Progress Complete

Reports
AA (5 pages)  File in Adobe's Portable Document Format (PDF) . O'Neill, M. W., and Vipulanandan, C., Response of Tension Piles to Vertical Seismic Motion in Saturated Fine Sand, Progress Report No. 1, University of Houston, Houston, Texas, February 10, 1989.
AB (166 pages) File in Adobe's Portable Document Format (PDF) . O'Neill, M. W., Vipulanandan, C., and Ocha, M., Response of Tension Piles to Vertical Seismic Motion in Saturated Fine Sand, Final Report, Report No. UHCEE 89-14, University of Houston, Department of Civil and Environmental Engineering, Houston, Texas, December 1989.
AC (309 pages) File in Adobe's Portable Document Format (PDF) . O'Neill, M. W., Vipulanandan, C., and Ocha, M., Response of Tension Piles to Simulated Seismic Motion in Saturated Fine Sand, Final Report, Report No. UHCEE 90-09, University of Houston, Department of Civil and Environmental Engineering, Houston, Texas, December 1990.
AD (1 page) File in Adobe's Portable Document Format (PDF) . O'Neill, M. W., Vipulanandan, C., and Ocha, M., Response of Tension Piles to Simulated Seismic Motion in Saturated Fine Sand, Paper for the Transportation Research Record, University of Houston, Department of Civil and Environmental Engineering, Houston, Texas, May 1991.

 

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