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SUMMARY:Seismic design and assessment of bridges using advanced inelastic 
 analysis tools
DTSTART:20140502T121500
DTEND:20140502T131500
DTSTAMP:20260502T061842Z
UID:b6cdad7f30e035fc12d7018af12a46880e5642be9c1c0c30b3982365
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Andreas Kappos (City University\, UK)\nModern codes for 
 seismic design of buildings\, bridges\, and other civil engineering struct
 ures offer to the designer the choice between elastic and inelastic analys
 is methods\, i.e.\n• ‘Traditional’ methods wherein design is based o
 n the results of a series of elastic analyses that provide linear action e
 ffects that are reduced by a global force reduction factor (q-factor in Eu
 rope\, R-factor in the US) that depends on the overall ductility and overs
 trength capacity of the structure.\n• Displacement and/or deformation ba
 sed methods\, wherein inelastic deformation demands in the structure are e
 stimated for a given level of the seismic action with the aid of a series 
 of inelastic analyses of either the static or dynamic type. These demands 
 are then checked against the corresponding deformation capacities of the c
 ritical structural elements.\nOver the last two decades\, researchers and 
 engineers have gradually shifted towards the performance-based assessment 
 and design concept\, wherein inelastic deformation demands are (preferably
 ) directly obtained from the aforementioned nonlinear response analysis of
  the structure. The safety verification then involves comparing these dema
 nds against the deformation capacities to verify the performance of the st
 ructure with respect to a given performance objective (e.g. allowable memb
 er rotation for ensuring life safety under a ground motion having an appro
 priately selected probability of occurrence). This type of analysis is mor
 e suitable for the assessment of existing structures (where member strengt
 hs can be calculated before carrying out the analysis) than for the design
  of new ones.\nThe lecture will focus on the use of inelastic analysis met
 hods for the seismic assessment and design of bridges\, for which the work
  carried out so far\, albeit interesting and useful\, is nevertheless clea
 rly less than that for buildings. A critical overview of nonlinear static 
 (pushover) methods that account for higher mode effects (which are typical
 ly significant in bridges) will be given\, along with comparisons with res
 ponse-history analysis results.\nIn addition to analysis methods\, the lec
 ture will include a presentation of a deformation-based design method that
  can be applied to bridges with several significant modes.\nBio: Prior to 
 joining City University (in March 2013) Andreas Kappos was a Professor at 
 Department of Civil Engineering\, of the Aristotle Univ. of Thessaloniki s
 ince 2002\, and Head of the Structures Section from 2008 to 2010. He has f
 irst joined the Department as a lecturer in 1988\, after having completed 
 his PhD studies in 1986. In 1983-1984 he was a Visiting Research Fellow at
  the Univ. of California\, Berkeley. From 1995 to 1999 he worked at the De
 pt. of Civil Engineering\, Imperial College London (UK)\, first as a lectu
 rer and later as a Reader of Earthquake Structural Engineering.\nAndreas K
 appos is the Secretary of the European Association of Earthquake Engineeri
 ng (EAEE) since 2010 and the Coordinator of the EAEE Working Group on Brid
 ges since 2004. He has also served as a member of a number of scientific c
 ommittees dealing with seismic design (incl. the Eurocode 8 Project Team) 
 and assessment (various fib and EAEE task groups).
LOCATION:GC C330
STATUS:CONFIRMED
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