The basic principles of dynamic centrifuge model testing are explained and some advantages and disadvantages of centrifuge modeling are described. Two examples of centrifuge model tests relevant to the performance of transportation structures during earthquakes are described: (a) a study of Struve Slough Bridge, which collapsed in theLoma Prieta Earthquake, and (b) mechanisms of liquefaction and development of sand boils. Two themes emerged from the examples cited. First, the results from centrifuge testing often provide an improved understanding of the deformation and failure mechanisms. Second, theimproved understanding provides a basis for the development of simplified but adequate methods of analyzing full-scale geotechnical structures.
Abstract