Dynamic site response analyses using effective stress based numerical procedure

The state of art of analyzing geotechnical earthquake engineering is briefly discussed. An analysis procedure which treats dynamic loading of geotechnical engineering structures as a boundary value problem is developed and verified using analytical results, centrifuge model test results, results from verified numerical procedure and instrumented site results. This analysis procedure is based on the finite element solution of the fully coupled dynamic governing equations of saturated porous media. In this numerical procedure, the stress-strain behavior of soils are described by bounding surface plasticity models. Non-destructive in-situ electrical method was used to get most of the constitutive model constants and initial state parameters for the numerical simulation.; The numerical solution of the fully coupled dynamic Biot's equation has been considered for dynamic and pseudo-static applications in geotechnical problems using the u-p formulation. The Biot's equation for saturated porous media is derived from first principle with all the assumptions introduced.; Predictions made by the numerical procedure are verified using analytical results from a consolidation problem, centrifuge model test results, and results from verified numerical procedure. Numerical prediction of u-p formulation using bounding surface plasticity soil models show good agreement in various conditions. Conclusion of the study is included together with suggestions for future research.