Abstract
A simple identification technique is developed to visualize the dynamic deformation mechanisms of centrifuge models of saturated soil and soil-pile systems using the measurements provided by sparsely distributed sensors. Cross-correlation analyses are employed first to assess the variation of shear wave velocity profile with time as soil experiences stiffness reduction and degradation during dynamic excitations. The corresponding time-dependent modal configurations are determined using the finite-element technique. These configurations are used along with recorded motions to evaluate optimal time histories of displacement and strain fields based on a spectral motion reconstruction. Visualizations of the response of infinite slope and soil-pile centrifuge models revealed salient and complex multi-dimensional deformation patterns, especially at high pore pressure ratios. The developed technique provides an effective tool to visualize and analyze the dynamic response of centrifuge, shake-table and field soil systems.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 171-182 |
| Number of pages | 12 |
| Journal | Earthquake Engineering and Engineering Vibration |
| Volume | 5 |
| Issue number | 2 |
| DOIs | |
| State | Published - Dec 2006 |
Keywords
- Centrifuge model
- Liquefaction
- Soil dynamics
- Visualization
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Geotechnical Engineering and Engineering Geology
- Mechanical Engineering