Behavior of Model Pile in Saturated Sand Subjected to Cyclic Lateral Load
Date Issued
2008
Date
2008
Author(s)
Tzeng, Yung-Cheng
Abstract
In order to understand the behavior of soil-pile interaction for a pile foundation subjected to lateral loading, a series of lateral load tests were conducted on the instrumented model pile with a length of 1.50 m﹐an outer diameter of 101.6 mm and a wall thickness of 3 mm within a saturated Vietnam sand specimen inside the laminar shear box at National Center for Research on Earthquake Engineering (NCREE).he lateral load tests on the model pile with and without sand were performed under static and cyclic loading conditions. The input motions of cyclic loading included sinusoidal waves with amplitudes ranging from 1 mm to 5 mm and frequencies of 0.5 Hz﹐1 Hz and 2 Hz. The dial gages, strain gages and piezometers were installed at various locations to measure the responses of pile and soil under different loading conditions.he moment-curvature relation of model pile without sand specimen presented a linear-elastic behavior in the lateral load test. The stiffness of pile top displacement of model pile in the sand specimen decreases with increase of deflection at pile top and increases with frequency. The damping ratios of the model pile within the sand specimen in lateral load test increase with increase of deflection and decrease with frequency. The p-y curves were obtained based on the measured pile curvatures along the pile. The modulus of p-y curve increases with the depth of the pile﹐and the modulus of p-y curve at the same depth of the pile increases with loading frequency. It was observed that the generated excess pore water pressure mainly occurred near the pile perimeter when the model pile subjected to lateral load. The positive excess pore water pressures were generated on the compression side of pile, while on the extension side, the negative excess pore water pressures were occurred.
Subjects
pile
lateral load
soil-pile interaction
model pile test
saturated sand
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-97-R95521104-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):b453277d475f5287c5ec74f074d6ec5a