Modeling the Influence of Density, Structure and Stress-induced Anisotroßy of Soft Soil"
MUSIC daily short course, 04.05.2017
In this course, the mechanical behavior of sand, will systematically be described and modeled with a newly proposed elastoplastic model. Before we will focus on general mechanisms of sand structures. And, before giving a detailed reasoning of the model, the background of the need for such kind of unified model will be introduced firstly, followed by its performance and verification with laboratory tests and field observation.
Without losing the generality of sand, a specific sand called as Toyoura sand, a typical clean sand found in Japan, has been discussed in detail. In the model, the results of conventional triaxial tests of the sand under different loading and drainage conditions were simulated with 8 parameters, among which 5 parameters are the same as those for Cam-clay model. Once the parameters are determined with the conventional drained triaxial compression tests and undrained triaxial cyclic loading tests, they are fixed to uniquely describe the overall mechanical behaviors of the Toyoura sand, without changing the values of the eight parameters. Particular attention is paid to modeling the effects of 1) Overconsolidation; 2) soil structure formed in naturally deposit process; and stress-induced anisotropy.
The proposed model is based on modified Cam-clay model (Roscoe and Burland, 1968), the concept of subloading (Hashiguchi and Ueno, 1977) and the concept of superloading (Asaoka, 2003).
Daily short course overview - May 4:
Part I (09.30-12:00):
Lunch break 12:00-13:00
Part II (13:00-15:30):
Prof. Feng Zhang
Dr. Feng Zhang is a professor of Nagoya Institute of Technology (NIT, National University Association, Japan) since 2005. He served as the head of Civil Engineering Department of NIT during 2006 to 2008 and the director of Advanced Disaster Prevention Engineering Center of NIT during 2011 to 2014. His main research interests are in constitutive modeling in soil mechanics & rock mechanics, numerical analyses in geotechnical engineering and seismic evaluation of earth structures. He is recipient of the awards including the Best Paper Medal of Soils & Foundations (2002, 2011) and the Best Paper Medal of Japan Society of Civil Engineers (2007).
MUSIC Graduate School with Sofja Kovalevskaja Group
Please, register until April 27: Email: Schulte@ikm.uni-hannover.de
09:30 Uhr - 16:00 Uhr
Institut für Kontinuumsmechanik
Tel.: 0511 762 17834
Appelstr. 11 A