Computational Mechanics and Design Group

Department of Civil & Structural Engineering

Research Seminar - Inverse analysis of soil properties from physical models

Date/time

12/02/2014 - 16:15 to 16:45

Speakers

Dr Samuel Hawksbee

Venue

Mappin Building,MAPP-J Carr Lib

About the event

Physical modelling can be used to understand complex soil-structure interactions, which might be difficult to model numerically.  Modern instrumentation (e.g. LVDTs, strain gauges, load cells) allows accurate information to be gathered on the displacement of structural elements. Additionally, modern digital image correlations (DIC) techniques allow displacements within the soil mass to be determined.  Using this information, a variety of techniques can be used to determine strain throughout the system. Typically, simple analytical and/or numerical tools are used to interpret the resulting data. However, more sophisticated methods including automated back calculation (i.e. inverse analysis) of soil properties from test responses might yield important insights. In this presentation, an optimization technique capable of fitting a strain field, to the known boundary conditions, simple material assumptions (e.g. rigid body motion, incompressibility) and displacement data, from both instrumentation and DIC, will be described. Furthermore, an inverse method for determining soil properties using the derived strain fields is described.