Rate of loading parameters for vertically loaded piles in clay

Conference · Tue May 01 04:00:00 EDT 1984 · Proc., Annu. Offshore Technol. Conf.; (United States)

OSTI ID:6458048

Briaud, J L; Felio, G Y; Garland, E

The analysis of 152 laboratory tests and 32 pile load tests confirms that for clays, the faster the rate of loading, the higher the undrained shear strength and the higher the pile capacity. The data shows that the gain in undrained shear strength due to increasing rate of loading increases with increasing water content, plasticity index, liquidity index, overconsolidation ratio but with decreasing undrained shear strength. A simple model is proposed to quantify the rate of loading effects on undrained shear strength. The viscous exponent n which is the main parameter of the model can be measured by conventional laboratory tests or possibly by cone penetrometer testing, or as a last resort by the proposed empirical correlations to index properties. This model is used to develop rate dependent t-z curves and a computer program to predict the response of a pile subjected to a certain rate of vertical loading. The model and the program are checked by comparing the predicted and measured behavior of two piles.

• Research Organization: Texas A and M U.
• OSTI ID: 6458048
• Report Number(s): CONF-8405208-
• Conference Information: Journal Name: Proc., Annu. Offshore Technol. Conf.; (United States) Journal Volume: 1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603 -- Materials-- Properties
42 ENGINEERING
423000* -- Engineering-- Marine Engineering-- (1980-)
CLAYS
COMPUTER CODES
CORRELATIONS
DIAGRAMS
FORECASTING
FOUNDATIONS
LOADING
MATERIALS HANDLING
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MECHANICAL PROPERTIES
MECHANICAL STRUCTURES
MOISTURE
PENETROMETERS
PLASTICITY
SHEAR PROPERTIES
SUPPORTS
TESTING
VISCOSITY