Postdoctoral position in 2D and 3D seismic wave propagation in complex media including nonlinear soil response

Topic proposed in collaboration by the Laboratoire Central des Ponts et Chaussées and the Institut de Radioprotection et Sûreté Nucléaire

Contact: Prof. Jean-Francois Semblat, e- mail: semblat@lcpc.fr

Contact: Dr. Fabian Bonilla, e- mail: fabian.bonilla@irsn.fr

Objective:

Since 2006 the LCPC and the IRSN, among other institutions, work together within the ANR project called QSHA (Quantitative Seismic Hazard Assessment). One of the objectives of this project is the study of seismic wave propagation in complex media including nonlinear soil response. This project finances a postdoctoral position during 1 year.

Proposed research:

The main objective of this study is the analysis of seismic wave propagation in sedimentary environments. Since we are interested in simulating large ground motion, nonlinear soil response needs to be included. The proposed research aims:

• 1.theoretical formulation of different nonlinear soil behavior models
• 2.numerical formulation and computer implementation of 1D propagation in nonlinear media of 3 components of ground motion
• 3.numerical formulation of nonlinear rheologies to be implemented inside of LCPC’s computer code CESAR. Static and dynamic analyses of these rheologies will be then performed in two dimensions
• 4.numerical modeling of wave propagation on simple canonical models
• 5.geotechnical data collection in France (e.g. Nice, Grenoble) as well as in Los Angeles basin (ROSRINE database)
• 6.numerical modeling in 1D/2D for real sites