BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Memento EPFL// BEGIN:VEVENT SUMMARY:Seismic Microzonation and Earthquake Scenarios for Urban Sustainab ility DTSTART:20160119T161500 DTEND:20160119T171500 DTSTAMP:20260916T054514Z UID:c82808d31c5d0f7d097a55ecbf3e358e9fb53e83c46b3dafb85ae8c9 CATEGORIES:Conferences - Seminars DESCRIPTION:Prof. Dr Atilla Ansal\, Ozyegin University\, Civil Engineering Department\, Istanbul\, Turkey\nSeismic microzonation and earthquake loss estimation scenarios are needed for city planning\, disaster preparedness \, risk reduction and hazard mitigation decisions\, and urban rehabilitati on actions in earthquake prone areas. Loss estimation due to earthquakes i n an urban environment is a very complex process that requires detailed bu ilding inventories\, realistic estimation of earthquake characteristics on the ground surface and comprehensive assessment of building vulnerabiliti es.\nThe earthquake hazard is spatially distributed in relation to earthqu ake sources that need to be assessed based on the regional seismotectonic scale and local site conditions. Mapping the variation in earthquake hazar d at an urban scale makes it possible to select zones that may relatively be less affected for the allocation of appropriate land use. Urban develop ment patterns can be oriented toward these zones to minimize possible eart hquake damages.\nThe three principal factors controlling earthquake loss a re earthquake source characteristics\, site response and structural featur es. The seismic microzonation maps would indicate the distribution of site response with respect to ground shaking intensity\, liquefaction and land slide susceptibility\; thus providing an input for urban planning and eart hquake mitigation priorities at an urban scale.\nA grid system is recommen ded for dividing the investigation area into cells according to the availa bility of geological\, geophysical and geotechnical data. Site characteriz ations are performed based on available borings and other relevant informa tion for defining representative soil profiles for each cell with shear wa ve velocities extending down to the engineering bedrock. 1D site response analyses are conducted to estimate site specific earthquake ground motion characteristics on the ground surface for each representative soil profile . Average of spectral accelerations between 0.1s and 1s periods of elastic acceleration response spectrum are calculated as one of the two parameter s representing earthquake shaking intensity on the ground surface. Site sp ecific peak spectral accelerations corresponding to 0.2s period are also c alculated as the second microzonation parameter using the empirical amplif ication relationships proposed by Borcherdt (1994) based on equivalent she ar wave velocities for the top 30m of the soil profiles. Superposition of these two parameters is assumed to represent overall effect of site condit ions and is adopted as the criteria for the microzonation with respect to ground shaking intensity.\nIt is also possible to estimate building damage and causalities based on microzonation maps used as an input to earthquak e damage scenarios. These estimates may be very approximate and may not al ways be on the conservative side based on the accuracy of the input data a nd methods of analyses. However\, they can be more realistic when more com prehensive data and more sophisticated analysis methods are implemented. T hus one of the important issues is the estimation of the accuracy and corr esponding level of complexity in the analytical studies.\nThe results obta ined using different levels of seismic hazard and site characterisation da ta will be summarised very briefly to demonstrate the importance of the co mprehensive site characterisation as well as the procedures used to estima te site effects for different levels of seismic hazard based on case studi es conducted in Istanbul.\nBio : Atilla Ansal received his Diploma Enginee ring degree in Civil Engineering from Istanbul Technical University in 196 9 and his Ph.D. in Geotechnical Engineering from Northwestern University\, USA in 1977. He was promoted to Associate Professorship in 1982 and to Pr ofessorship in 1988 in Istanbul Technical University. He moved to Kandilli Observatory and Earthquake Research Institute of Bogaziçi University in 2002. Since March 2012 he is professor in the Engineering Faculty of Ozyeg in University and Chairman of Civil Engineering Department. He served as v isiting professor and researcher in Norway\, Portugal\, Italy\, Japan\, US A and UK.\nHe has been the Secretary General of European Association for E arthquake Engineering during 1994-2014 and President since 2014. He starte d the publication of Bulletin of Earthquake Engineering in 2002 as the Edi tor in Kluwer which later became part of Springer. BEE got its first impac t factor in 2007 from SCSI\, and since then\, the impact factor of BEE kep t increasing and in 2014 was 1.89 which is the second highest among SCSI I ndexed earthquake engineering journals. He is also the Editor in Chief of the book series by Springer on “Geotechnical\, Geological and Earthquake Engineering”.\nHe served as the President of the Turkish Chamber of Civ il Engineers between 1998-2000\, and of Turkish National Committee on Eart hquake Engineering between 2005-2009\, Co-chairman of ISSMGE Technical Com mittee TC4 on “Earthquake Geotechnical Engineering” between 2005-2009\ , and Core Member of ISSMGE Technical Committee TC 19 on “Preservation o f Monuments and Historic Sites” between 2001-2009 and European Technical Committee ETC12 on “Evaluation of Eurocode 8” since 2003.\nHis main a reas of interest are microzonation methodologies\, earthquake scenarios\, effects of geotechnical factors on earthquake damage\, cyclic behaviour of clays and sands\, liquefaction\, variability of strong ground motion char acteristics. He published about 200 articles in conference proceedings\, j ournals\, books and as technical reports in English and Turkish. 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