Project:  A Modified Newmark Model for Lateral Spreading

PI(s):  Steve Kramer

Sponsor:  University of Washington

Objective:  To develop a practical numerical model for prediction of permanent displacements due to lateral spreading.

Research Approach:  A modified Newmark sliding block model is being developed to predict permanent displacements due to lateral spreading. The model takes the form of a nonlinear, inelastic single-degree-of-freedom (SDOF) system. The stiffness of the SDOF system is governed by an analog to the Uwsand constitutive model to allow representation of the basic aspects of cyclic mobility that govern the lateral spreading problem. By comparing the permanent displacements predicted by the nonlinear wave propagation program, WAVE, with those predicted by the modified Newmark model, functions that allow soil paramters to be mapped into SDOF parameters will be identified. With these parameters, lateral spreading displacements will be predicted by the modified Newmark model.

For more information send E-Mail to: kramer@u.washington.edu