Response analysis

Engineering

Soil liquefaction

Geotechnical engineering

Shear (geology)

Dilation (metric space)

Constitutive equation

Scaling

Seismology

Overburden

Geology

Finite element method

Petrology

Mathematics

Earthquake magnitude

Liquefaction

Geometry

OpenSees

Structural engineering

Soil Dynamics and Earthquake Engineering

A constitutive soil model that was originally developed to model liquefaction and cyclic mobility has been updated to comply with the established guidelines on the dependence of liquefaction triggering to the number of loading cycles, effective overburden stress (Kσ), and static shear stress (Kα). The model has been improved with new flow rules to better capture contraction and dilation in sands and has been implemented as PDMY03 in different computational platforms such as OpenSees finite-element, and FLAC and FLAC3D finite-difference frameworks. This paper presents the new modified framework of analysis and describes a guideline to calibrate the input parameters of the updated model to capture liquefaction triggering and post-liquefaction cyclic mobility and the accumulation of plastic shear strain. Different sets of model input parameters are provided for sands with different relative densities. Model responses are examined under different loading conditions for a single element.

A 3D model for earthquake-induced liquefaction triggering and post-liquefaction response