Urban seismic risk assessment: statistical repair cost data and probable structural losses based on damage scenario— correlation analysis
Journal Title: International journal of advanced structural engineering - Year 2016, Vol 8, Issue 2
Abstract
The current seismic risk assessment is based on two discrete approaches, actual and probable, validating afterwards the produced results. In the first part of this research, the seismic risk is evaluated from the available data regarding the mean statistical repair/strengthening or replacement cost for the total number of damaged structures (180,427 buildings) after the 7/9/1999 Parnitha (Athens) earthquake. The actual evaluated seismic risk is afterwards compared to the estimated probable structural losses, which is presented in the second part of the paper, based on a damage scenario in the referring earthquake. The applied damage scenario is based on recently developed damage probability matrices (DPMs) from Athens (Greece) damage database. The seismic risk estimation refers to 750,085 buildings situated in the extended urban region of Athens. The building exposure is categorized in five typical structural types and represents 18.80 % of the entire building stock in Greece. The last information is provided by the National Statistics Service of Greece (NSSG) according to the 2000–2001 census. The seismic input is characterized by the ratio, ag/ao, where ag is the regional peak ground acceleration (PGA) which is evaluated from the earlier estimated research macroseismic intensities, and ao is the PGA according to the hazard map of the 2003 Greek Seismic Code. Finally, the collected investigated financial data derived from different National Services responsible for the post-earthquake crisis management concerning the repair/strengthening or replacement costs or other categories of costs for the rehabilitation of earthquake victims (construction and function of settlements for earthquake homeless, rent supports, demolitions, shorings) are used to determine the final total seismic risk factor.
Authors and Affiliations
Anastasia K Eleftheriadou, Aikaterini D Baltzopoulou, Athanasios I Karabinis
Keywords
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