Seismic Response of Tieback Retaining Walls. Phase 1

摘要

The current design practice used by WSDOT for the design of permanent tieback walls is to assume that the static design of a tieback wall retaining clayey soils provides an adequate reserve of strength to prevent failure during seismic loading. The design procedure is based largely on the assumption that the soil and the wall move together during ground shaking and that significant dynamic loads are not produced. For tieback walls retaining sandy soils, it is assumed that dynamic loads are produced. Mononobe-Okabe dynamic soil pressures are added to the static design pressure to account for the dynamic load. The validity of these assumptions and the resultant design practices is evaluated in the study.