Διαδικτυακό Σεμινάριο με θέμα: Introduction to soil liquefaction
H Επιτροπή Δομοστατικών & Γεωτεχνικών Θεμάτων του ΣΠΟΛΜΗΚ,
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Διαδικτυακό Σεμινάριο με θέμα
Introduction to soil liquefaction
Τετάρτη 28.05 | 15:00 - 17:00 | Μέσω Πλατφόρμας ZOOM
Περιγραφή: Earthquake-induced liquefaction can occur during an earthquake in loose sandy soils below the ground water table. Liquefaction is associated with rising pore water pressures, leading to partial or total loss of the soil’s shear strength and to the soil behaving like a viscous fluid. The common conditions required for its triggering and the extent of damage it can cause, render it amongst the most catastrophic seismic hazards. Experience from previous earthquakes has revealed its disastrous consequences, including excessive settlement and rotation up to complete toppling, especially in dense urban environments. After a brief introduction, the lecture will delve into the evaluation of liquefaction susceptibility, which is the first step in liquefaction hazard assessment. A quick revisit of cohesionless soil behavior will help us understand better how the initial soil state influences liquefaction susceptibility. Then, we will move on to the initiation of liquefaction, making a distinction between flow liquefaction and cyclic mobility. The lecture will culminate with evaluation of liquefaction potential, and the most crucial effects of liquefaction, using examples from recorded earthquakes, such as Kobe and Niigata.
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Εισηγητής: Ioannis Anastasopoulos, Professor of Geotechnical Engineering at ETH Zurich
Ioannis Anastasopoulos has been Full Professor of Geotechnical Engineering at ETH Zurich since 2016. Since 2023, he is also Head of the Department of Civil, Environmental and Geomatic Engineering. He specializes in geotechnical earthquake engineering and soil–structure interaction, combining numerical with experimental methods. His academic degrees include a PhD from the National Technical University of Athens (NTUA), an MSc from Purdue University, and a Civil Engineering Diploma from NTUA. His research interests include resilient seismic design and mitigation techniques, sustainable retrofit of bridge foundations, faulting and its effects on structures, offshore geotechnics, tsunamis and their effects on coastal infrastructure, scouring of bridge foundations, and soil liquefaction. He is the inaugural recipient of the ISSMGE Young Researcher Award in Geotechnical Earthquake Engineering, and winner of the 2012 Shamsher Prakash Research Award. He has been a consultant in major projects in Europe, US and the Middle East. His consulting work ranges from the design of pile-rafts of tall buildings, to bridge foundations, metro stations, tunnels, and quay walls, as well as special design against faulting. He is Editor-in-Chief of Soil Dynamics and Earthquake Engineering, and has been Associate Editor or Editorial Board Member in several Journals, including the JEE and Géotechnique. He is a Director of IAEE, and Chair of ISSMGE TC104 on Physical Modelling.