Affiliations: Waseda Institute for Advanced Study, Suginami, Tokyo,
Japan | Chiba Institute of Technology, Narashino, Chiba,
Japan
Note: [] Corresponding author: N. Kodama, Waseda Institute for Advanced
Study, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan. E-mail:
komiya.kazuhito@it-chiba.ac.jp
Abstract: The forces applied to a structure from the soil ground during an
earthquake and the dynamic response of a structure are problems that are not
well understood. In recent years, seismic design technology aided by numerical
simulation is under active development. Successful improvement of the accuracy
and reliability of numerically simulated results relies on a clear
understanding of the seismic force transmission mechanism between the soil and
a structure associated with mechanical properties of soil. In this study, laboratory shaking tests were conducted using the
unique apparatus designed to have a structure move only by its inertial force
and the lateral earth pressure that comes from surrounding sandy soils. The
earth pressure at the structure surface and the relative displacement between
the soil and the structure were measured in the experiments under various
conditions. A new Finite Element interface model for sandy soil-structure
dynamic interaction is proposed from the experimental results. Estimated
seismic responses of a bridge pier calculated by the proposed interface model,
conventional linear elastic model and tension cut-off model are compared.
