Large-Scale Physical and Computational Simulation of Soil-Structure Systems

Synopsis

Calibration, on the basis of data from centrifuge and shake table experiments, continues to promote the development of more accurate computational models. Capabilities such as coupled solid–fluid formulations and nonlinear incremental-plasticity approaches allow for more realistic representations of the involved static and dynamic/seismic responses. In addition, contemporary high-performance parallel computing environments are permitting new insights, gained from analyses of entire ground-foundation-structural systems. On this basis, the horizon is expanding for large-scale numerical simulations to further contribute toward the evolution of more accurate analysis and design strategies. The presentation addresses these issues through recently conducted large-scale physical and computational representative research efforts that simulate the seismic response of: (1) cohesive backfills behind retaining walls, (2) liquefaction and lateral spreading loads on piles and pile groups, (3) shallow-foundation liquefaction countermeasures, (4) pile-supported wharf systems, and (5) full bridge-ground systems. A discussion of enabling tools for routine usage of such 3D simulation environments is also presented, as an important element in support of wider adoption and practical applications. In this regard, graphical user interfaces and visualization approaches can play a critical role.

About the speaker

Prof. Ahmed Elgamal

Ahmed Elgamal chaired the Department of Structural Engineering from 2003 to 2007. In 1984, he received his Ph.D. from Princeton University. He joined UCSD in 1997 as Professor after a post-doctoral appointment at the California Institute of Technology (CalTech, Pasadena, CA, 1985-86), and faculty positions at Rensselaer Polytechnic Institute (New York, Asst and Assoc Prof, 1986-1996) and Columbia University (New York, Assoc Prof, 1996-1997). He served (2006-2007) as Principal Investigator of the US National Science Foundation George E. Brown Network for Earthquake Engineering Simulation (NEES) Information Technology project, and as the Geotechnical Thrust Area Leader (2001-2007) of the University of California at Berkeley, Pacific Earthquake Engineering Research Center (PEER).

His areas of research interest include large-scale geomechanics soil-structure experimental and computational simulation (http://peer.berkeley.edu/bridgepbee), sustainability in geomechanics, information technology (IT) applications in civil engineering and geomechanics, and interpretation of recorded geo-systems response through system identification and data mining procedures. Incorporation of IT into geotechnical and structural engineering is currently among his main research areas, with emphasis on health monitoring and earthquake engineering applications. Internet applications include sensor networks for monitoring the civil infrastructure, with real-time condition assessment and decision-making algorithms. Integration of research and education with live web-accessible experiments is also of interest (http://webshaker.ucsd.edu). He is author and co-author of over 250 technical publications, and currently serves as Editor-in-Chief of the Journal of Soil Dynamics and Earthquake Engineering. Over the years, he has consulted and provided professional services in the general areas of geomechanics and geotechnical engineering for a number of national and international organizations.

Further information

This evening meeting is organised by SECED and chaired by Tiziana Rossetto (UCL). Non-members of the society are welcome to attend. Attendance at this meeting is free. Seats are allocated on a first come, first served basis. For further information, please contact Greg James (tel. 020 7665 2229).