ΤΜΗΜΑ ΠΟΛΙΤΙΚΩΝ ΜΗΧΑΝΙΚΩΝ
ΕΡΓΑΣΤΗΡΙΟ ΓΕΩΤΕΧΝΙΚΗΣ ΜΗΧΑΝΙΚΗΣ
ΓΕΩΤΕΧΝΙΚΗΣ ΚΑΙ ΣΕΙΣΜΙΚΗΣ ΜΗΧΑΝΙΚΗΣ
Ανακοινώνεται ότι την Τρίτη 23 Φεβρουαρίου 2010 και ώρα 3:00 μμ
στο Αμφιθέατρο Ευθύμιος Μαστρογιάννης (ΑΠΜ-1) του κτηρίου Πολιτικών Μηχανικών θα δοθεί διάλεξη με θέμα:
On Seismic Design of Retaining Structures
ΟμιλητήςθαείναιοΚαθηγητήςτου University of California, Berkeley,
Department of Civil and Environmental Engineering
Dr. Nicholas Sitar
Starting with the Loma Prieta Earthquake in 1989 there has been an increased awareness of the potential magnitude of strong ground motions produced by major tectonically active faults. An important consequence has been the gradual tightening of code requirements for the design of retaining structures suggesting that these structures should be designed to much higher levels of seismic loading than assumed in the past. However, at the same time, field observations of these structures generally show excellent behavior inconsistent with the analytical predictions. The objective of this presentation is to introduce field observations coupled with experimental, geotechnical centrifuge model data showing that the failure mechanisms typically assumed in many of the current design methods do not match the actual behavior. More importantly, the experimental data suggest that the predicted design forces typically overestimate the actual demands on the structures, leading to very conservative designs. Thus, there is a need for a rational, observation based re-evaluation of the basic assumptions made in the current designs and for the development of a new design procedures based on the best understanding of the actual failure mechanisms.
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