Direct Simple Shear (DSS) Model
27 Jun 2013 | Computational Models | Contributor(s): Arash Khosravifar, Ross W Boulanger, Rachelle Howell, Xiaoyue Wang
This is an OpenSees model of a simple shear test. The model can predict the drained or undrained responses of sand or clay under cyclic or monotonic loading. Two constitutive models are available for the soil, the Pressure-Dependent-Multi-Yield02 (PDMY02) model for sand and the …
RAPID: Geotechnical Engineering Reconnaissance of the M 9.0 Japan Earthquake of March 11, 2011
09 Feb 2012 | Poster | Contributor(s): Ross W Boulanger
Poster for NSF RAPID workshop.
Dynamic Behavior of Slickensided Surfaces
23 Aug 2010 | Active Documents | Contributor(s): Christopher Meehan, James Duncan, Ross W Boulanger
This project consists of a series of centrifuge tests that were performed using the UC Davis geotechnical centrifuge. The purpose of these tests was to measure the amount of displacement that occurs during earthquake shaking along a preformed slickensided clay surface. The recorded data can be used …
Pile Pinning Effects on a Bridge Abutment in Laterally Spreading Ground during Earthquakes
17 Aug 2010 | Active Documents | Contributor(s): Ross W Boulanger
Three centrifuge tests conducted at University of California at Davis to study pile pinning effects on bridge abutments over liquefied and laterally spreading ground.
Ross Boulanger, Bruce Kutter, Richard Armstrong, Umit Guleerce, Arash Khosravifar
Collaboration between E-Defense and NEES: Studying Pile Stress in Laterally Spread Ground
17 Aug 2010 | Active Documents | Contributor(s): Ross W Boulanger, Kohji Tokimatsu, Hiroko Suzuki
Two centrifuge model tests, Tests 1 and 2, were planned to estimate failure mechanism of piles in the ground behind a quay wall during laterally spreading. Test 1 included three pile groups with different pile caps and pile number, while Test 2 included two pile groups with the same pile cap, pile …