Lateral Loading Test on Model Pile in Saturated Sands
Date Issued
2011
Date
2011
Author(s)
Lin, Chang-Liang
Abstract
Two lateral load tests on a model aluminum pile buried in saturated dense sands were conducted and analyzed in this study. The tests were performed at the National Center for Research on Earthquake Engineering (NCREE) of Taiwan. The first test was a displacement-controlled cyclic test with displacement amplitude of 5 mm at the pile head. The second test was a monotonic load test up to a maximum displacement of 70 mm at the pile head. The lateral displacement of the first test was small and the pile response was elastic during the whole loading process; the lateral displacement of the second test was large and the pile response gradually moved from the elastic state to the inelastic state with lateral loading. Besides, a two-point bending test on the model pile itself was conducted to obtain the nonlinear moment-curvature relationship of the model pile.
On the basis of the beam theory, the pile responses, including the deflection, slope, moment, and shear force of the pile shaft, and the corresponding soil reactions are computed using the strain measurements from the strain gauges on the pile. Collecting the pile displacements and soil reactions deduce the p-y curves. In the process of developing the p-y curves, it is found that the actual nonlinear property of the pile section is essential to deduce correct p-y relationships. This study also compares the characteristics of the p-y curves in dense sand with those in loose sand.
Finally, the program SAP2000 is used to simulate the lateral load tests. The numerical model uses the Winkler-beam model to simulate the pile-soil system. The results of simulation are satisfactory.
Subjects
Model Pile test
Lateral load test
Regressive analysis
p-y curve
Pile-soil interaction
Bending test
Type
thesis
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