Response of Piles during Earthquakes: Dynamic Soil-Pile-Superstructure211 Interaction

摘要

The dynamic response of pile foundations in soft clay and liquefiable sand during211u001estrong earthquake shaking was evaluated. The research consisted of two major 211u001ecomponents: (1) a series of dynamic centrifuge tests of pile-supported structures 211u001ein soft clay and liquefiable sand; and (2) an evaluation of dynamic 'beam on a 211u001enonlinear Winkler foundation' (BNWF) analysis methods against the centrifuge 211u001emodel results. Several BNWF computer programs were shown to give consistent 211u001eresults for similar idealizations of a physical problem. Two men p-y elements 211u001ewere implemented into the program GeoFEAP. The representation of radiation 211u001edamping was shown to be important in certain cases, with series radiation damping 211u001ebeing technically preferred over parallel radiation damping in such cases. 211u001eCalculated responses for a single pile in soft clay were in good agreement with 211u001ethe centrifuge data when using series radiation damping and a p-y element with 211u001egapping ability.