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SUMMARY:Seismic protection of new and existing structures exploiting nonli
 near soil–foundation response
DTSTART:20180323T121500
DTEND:20180323T131500
DTSTAMP:20260502T012533Z
UID:b92e44bb4af6db5627806303f24334987b96b90e15e3a5794a0da37b
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Dr Ioannis Anastasopoulos\, Chair of Geotechnical Engine
 ering\, ETH Zurich\, Switzerland\nAbstract: According to current seismic c
 odes\, the foundation soil is not allowed to fully mobilize its strength\,
  and plastic deformation is restricted to above-ground structural members.
  Capacity design is applied to the foundation guiding failure to the super
 structure\, thus prohibiting mobilization of soil bearing capacity. Howeve
 r\, a significant body of evidence suggests that allowing strongly nonline
 ar foundation response may be advantageous. The lecture will introduce an 
 alternative seismic design philosophy termed rocking isolation\, in which 
 soil yielding is used as a “fuse”. According to such a scheme\, the fo
 undation is intentionally under-designed to uplift and fully mobilize its 
 bearing capacity\, limiting the inertia transmitted onto the superstructur
 e. To unravel the effectiveness of rocking isolation\, a bridge pier is us
 ed as an illustrative example. A conventionally designed system is compare
 d to a rocking–isolated alternative. Their seismic performance is explor
 ed analytically\, through nonlinear finite element analyses\, and experime
 ntally\, through shaking table and centrifuge model testing. A similar com
 parison is performed for an existing structure. Finally\, novel concepts a
 re introduced\, aiming to minimize permanent rotations and settlements.\n\
 nShort bio: Ioannis Anastasopoulos has been Full Professor of Geotechnical
  Engineering at ETH Zurich since 2016. He specializes in geotechnical eart
 hquake engineering and soil–structure interaction\, combining numerical 
 with experimental methods. His academic degrees include a PhD from the Nat
 ional Technical University of Athens (NTUA)\, an MSc from Purdue Universit
 y\, and a Civil Engineering Diploma from NTUA. His research interests incl
 ude the development of innovative seismic hazard mitigation techniques\, f
 aulting and its effects on infrastructure\, site effects and slope stabili
 zation\, railway systems and vehicle–track interaction\, seismic respons
 e of monuments\, offshore geotechnics\, and earthquake crisis management s
 ystems. He has been involved as a consultant in a variety of projects of s
 ignificance in Europe\, but also in the US and the Middle East. His consul
 ting work ranges from special seismic design of bridges\, buildings\, reta
 ining walls\, metro stations and tunnels\, to harbour quay walls\, and spe
 cial design against faulting–induced deformation applying the methods he
  has developed. He currently serves as Associate Editor of Frontiers in Ea
 rthquake Engineering\, and has sat on the panel of Géotechnique and of th
 e ICE Geotechnical Engineering Journal. He is the inaugural recipient of t
 he Young Researcher Award of the ISSMGE in Geotechnical Earthquake Enginee
 ring\, and winner of the 2012 Shamsher Prakash Research Award.
LOCATION:GC B3 30 https://plan.epfl.ch/?room=GCB330
STATUS:CONFIRMED
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