Summary The response of pile foundations to lateral soil deformation induced by liquefaction during an earthquake is a key design consideration in seismically active regions. Liquefaction can increase the cost of bridge and building projects if not properly and timely identified prior to construction. In this training, a 2D finite-element (FE) model of a bridge abutment with piles is developed and used to identify and quantify the liquefaction regions and potential reductions
in the bridge foundation due to lateral spreading. The training will focus on how to set up the material model UBC Sand as well as how to set up special dynamic boundary, load conditions, and time steps for liquefaction analysis. It will conclude on how to use GTS NX advance features to inspection the structural demands as well as identifying the liquefied regions over the scope of the earthquake.
Learning Objectives Definition of advance parameters for Liquefaction material UBC Sand Meshing of 2D soil layers and 1D piles Application of Dynamic Free Field Boundary Condition Import of seismic acceleration function Time history analysis case set with time steps and initial stresses consideration Key soil and pile results review including liquefaction region identification (Pore Pressure Ratio, Normalized Max Stress Ratio)
Key Points UBC SAND Non Linear Time History Liquefaction Analysis Free Field Boundary Conditions Time History Functions Bridge Abutment Modeling Pile Foundation Design