SSI-BRIDGE: SOIL-BRIDGE INTERACTION DURING LONG-DURATION EARTHQUAKE MOTIONS FINAL PROJECT REPORT by Andre R. Barbosa, Ph.D. H. Benjamin Mason, Ph.D. and Kyle Romney, M.S. Oregon State University for Pacific Northwest Transportation Consortium (PacTrans) USDOT University Transportation Center for Federal Region 10 University of Washington More Hall 112, Box 352700 Seattle, WA 98195-2700