Response, Analysis, and Design of Pile Groups Subjected to Static & Dynamic Lateral Loads. Final 1999-2003

摘要

Static and dynamic lateral load tests were performed on four full-scale pile groups driven at four different spacings. P-multipliers to account for group interaction effects were back-calculated for each test. P-multipliers were found to be a function of row position within the group but were independent of position within a row. Curves were developed to define p-mulipliers as a function of pile spacing. Using these p-multipliers along with soil properties obtained from site characterization work, excellent agreement between measured and computed response could be obtained. Dynamic load tests were performed using the Statnamic load system. Dynamic lateral resistance was consistently higher than the measured static resistance, however, resistance was dynamic resistance was greater for the virgin load than for reloading. Simple one degree-of-freedom models were successfully used to interpret the static load-deflection curve from the dynamic load-deflection curves. These analyses indicate that the increased dynamic lateral resistance was largely due to damping.