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Technology
Assessment & Research (TA&R) Program
| Project
Number |
187 |
| Date of Summary |
September 30, 1997 |
| Subject |
Analytical Simulation of Biased
Loaded Tension Piles in Earthquakes |
| Performing Activity |
University of Houston |
| Principal Investigator |
Dr. Michael W. O'Neill |
| Contracting Agency |
Minerals Management Service |
| Estimated Completion |
Complete |
| Description |
This was a Joint Industry Project
(JIP) and is an adjunct to Project No. 128. The
study consisted of scaled laboratory tests of model piles loaded in biased tension during
simulated earthquakes under two conditions that an earlier study suggested may be critical
for the design of such piles. Piles used for foundations such as those for tension-leg
platforms and pile-supported hydraulic structures. These conditions, were addressed in two
separate tasks, including:
(1) the presence of `dirty` sandy soils with cohesion and
cementation and
(2) the overpressures generated at the soil-water interface
by the effects of the vertical component of earthquake motion.
The piles were tested in a pressure chamber and excited
through soil at the base of the pressure chamber through a closed-loop, programmable
testing machine. The behavior of the model piles under these conditions were analyzed
using state-of-the-practice computer programs with a view toward developing a soil model
that can be used in such programs by practitioners. |
| Progress |
Complete |
Reports |
AA
(29 pages; 868 KB)
 |
O'Neill, M. W.,C. Vipulanandan,
M. Ochoa, Response of Tension Piles to Simulated Seismic Motion in Saturated Fine Sand,
71st Annual Meeting, Transportation Research Board, Washington, D.C. January 12-16, 1992. |
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AB
(69 pages; 1,657 KB)
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Model testing of the Effects of
the Oceanside Event on Biased Loaded Tension Piles, Interim Report submitted by the
University of Houston, Houston, TX, June 13, 1994. |
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AC
(306 pages; 9,617 KB)
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Rao, Pramod M.,Cumaraswamy
Vipulanandan, and Michael W. O'Neill, Performance of Tension Piles During Simulated Ground
Shaking and Seaquakes, University of Houston, Department of Civil and Environmental
Engineering, August 1997. |
AB
(8308 KB; 198 pages) |
Horton, T. E., HYDAMP II: A Joint
Industry Program on Hydrodynamic Damping and Combined Motion, Final technical report
submitted by T. E. Horton, February 1995. |
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