000018649 001__ 18649
000018649 005__ 20170118182234.0
000018649 04107 $$aeng
000018649 046__ $$k2017-01-09
000018649 100__ $$aOrta, Belén
000018649 24500 $$aMethodology for An Effective Risk Assessment of Urban Areas: Progress and First Results of the Merisur Project

000018649 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018649 260__ $$b
000018649 506__ $$arestricted
000018649 520__ $$2eng$$aThe progress and results the MERISUR, Methodology for an Effective RISk assessment of URban areas, are presented. This project aims at developing an effective methodology for urban seismic risk assessment that provides solutions to some deficiencies detected after recent damaging events worldwide, including risk mitigation actions based on benefit/cost ratios. In a fisrt stage, the hazard and vulnerability models are developed and improved. A procedure to determine the hazardcontrolling seismogenic fault, contsistent with different probability levels, is established. Methods to include active faults as individual sources and to consider near filed effects that significantly amplify ground motions are proposed. A more complete description of seismic vulnerability encompassing structural, non-structural components is accomplished. Vulnerability modifiers to incorporate effects or urban parameters on vulnerability classes are also quantified. A distinction is also made between damage to structural and non-structural building elements. For this purpose, a pushover analysis is specifically carried out to model building response and damage trends on non-structural elements. This gives the primary damage. In addition, the area covered by the resulting debris is also estimated both in inner spaces (within the building) and in the outer space (public roads and streets). In this way, a volume of debris will be associated to each area unit of the city, and the potential damage to persons and elements exposed, such as urban furniture and vehicles, will be assessed. This constitutes the secondary damage. A static level of occupation (building, urban furniture, etc.) and a dynamic level of occupation (persons, vehicles) will be assigned to each area unit of the city, hereby defining the exposure in time and space. Earthquake losses related to primary damage of building components and to secondary damage (such as urban furniture and vehicles) will be also assessed. Cost/benefit ratios between ex ante risk mitigation measurements will be developed in order to decide whether risk transfer or risk retention is preferable for different risk scenarios. This analysis will confer effectiveness to the results of a seismic risk study. Overall, the estimate of earthquake losses and cost/benefit ratios are topics with little presence in the scientific literature concerning damaging earthquakes in Spain. Thus, the results of this study will provide effective solutions to the challenge to society tackled in this proposal.

000018649 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018649 653__ $$aSeismic Hazard; Seismic Risk, Vulnerability Assessment, Loss Estimate; Urban Risk.

000018649 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018649 720__ $$aOrta, Belén$$iGaspar-Escribano, Jorge-Miguel$$iBenito, Belén$$iCervera, Jaime$$iCuevas, Sandra Martí­nez$$iTorres, Yolanda
000018649 8560_ $$ffischerc@itam.cas.cz
000018649 8564_ $$s537729$$uhttps://invenio.itam.cas.cz/record/18649/files/1916.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1916.
000018649 962__ $$r16048
000018649 980__ $$aPAPER