AU - AU - TI - Centrifuge Modeling of Permeabilty and Pinning Reinforcement Effects on Pile Response to Lateral Spreading/ T2 - Technical report (Multidisciplinary Center for Earthquake Engineering Research (U.S.); SN - ISSN 1520295X U1 - 624 PY - 2007/// CY - New York: PB - University at Buffalo KW - MODELOS CENTRIFUGOS KW - ESTUDIOS DE VULNERABILIDAD SISMICA KW - PUENTES KW - DESPENDIMIENTO DE TIERRAS KW - CIMENTACIONES KW - PERMEABILIDAD DE SUELOS KW - INGENIERÍA CIVIL KW - CARRETERAS KW - INFRAESTRUCTURA N1 - Incluye bibliografía p. 323 N2 - The vulnerability of highway bridges to earthquake-induced ground failures arising from liquefaction has been clearly demonstrated by the extensive damage observed in the past earthquakes, particularly when a nonliquefied soil layer rides on top of the liquefied soil. Liquefaction induced lateral spreading may be reduced by the restraining forces provided by pile group foundations. This reduction in lateral displacement reduces the loads and displacement demands that are imposed on the piles. The first part of this work presents experimental results and analyses of six centrifuge tests that were conducted at the 150 g-ton RPI centrifuge to investigate the effect of soil permeability in the response of single piles and pile groups to lateral spreading. In the models that simulate a liquefiable coarse sand layer (saturated with water), the piles bounced back after a couple of cycles of shaking ER -