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SUMMARY:Open issues on seismic assessment of existing masonry buildings: l
 inear vs nonlinear\, static vs dynamic\, local vs global approaches
DTSTART:20180302T121500
DTEND:20180302T131500
DTSTAMP:20260429T060628Z
UID:33f468f657fac1ba5911d8ab054f085b570e3be58c2fd30b82a23e5e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Dr Sergio Lagomarsino\, Full Professor of Structural Eng
 ineering\, Department of Civil\, Environmental and Chemical Engineering\, 
 Polytechnic School\nDICCA - University of Genoa\, Italy\nABSTRACT: The sei
 smic assessment of existing masonry buildings is a difficult task due to t
 he complexity of reliable models\, particularly in the case of older non-e
 ngineered ones. The qualitative approach is a essential element of knowled
 ge for the interpretation of the seismic behaviour but cannot replace a qu
 antitative security check. As-built information\, based on historical note
 s on transformation and the survey of constructive details\, together with
  the results of investigation on material properties\, are the basis for t
 he choice and calibration of the structural models with which to carry out
  the verifications. Modelling and analysis procedures should be as accurat
 e as possible in catching the actual seismic response\, but at the same ti
 me robust and practice-oriented. This keynote lecture offers a general fra
 mework for the assessment of existing masonry buildings (in unreinforced\,
  reinforced and confined masonry) and is focused on distinctive features a
 nd open issues in this field. The assessment is based on the evaluation of
  the global seismic response\, relying on the in-plane resistance of mason
 ry walls\, and the verification of possible local mechanisms\, related to 
 out-of-plane behaviour of walls substructures. For the global analysis\, i
 t is suggested: a) a modelling approach that takes into account the diaphr
 agms stiffness\; b) different failure criteria for masonry piers for regul
 ar and irregular masonry\; c) specific failure criteria for the spandrels\
 ; d) a combination of global and local checks for the definition of limit 
 states. For local mechanisms\, the following are proposed: a) the use of e
 quilibrium limit analysis\, considering the evolution of rigid block mecha
 nisms\, for the evaluation of the horizontal seismic strength and the ulti
 mate displacement capacity\; b) a new formulation for the floor spectra\, 
 with an accurate estimate of the displacement demand on these mechanisms a
 t different levels of the building.\n\n Bio : Sergio Lagomarsino is profes
 sor of Structural Engineering at the University of Genoa\, since 2000. Aut
 hor of many journals papers and chapters of scientific books on the topics
 : seismic assessment of existing structures\, nonlinear modelling of mason
 ry\, preservation of monumental buildings and historical centres\, seismic
  risk and vulnerability analysis (in Scopus: h-index 24\, 78 articles and 
 1791 citations). He has coordinated the European project PERPETUATE on the
  seismic assessment and protection of cultural heritage assets\, as well a
 s many other national projects. He sits on the editorial boards of “Inte
 rnational Journal of Architectural Heritage" and of “Earthquakes and Str
 uctures”. He has served in the drafting panels of the Italian seismic co
 de and the Italian Guidelines for cultural heritage in seismic areas. At p
 resent\, he is member of the Project Team 3 that is working on the revisio
 n of Eurocode 8\, Part 3: “Assessment and retrofitting of buildings”. 
 He developed the software program TREMURI\, for the nonlinear seismic anal
 ysis of masonry buildings\, and the Italian survey form for post-earthquak
 e damage assessment of churches.
LOCATION:GC B3 30 https://plan.epfl.ch/?room=GCB330
STATUS:CONFIRMED
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