ECONOMIC EFFICIENCY OF SEISMIC VULNEARBILITY AND RETROFIT MEASURES - A MULTICRITERIA ANALYSIS Iuliana Armaş Maria Boştenaru
Overview Analysis scales Review existing Methods Actors Ontology Indicators Analytical hierarchy Automated methods Structural – socio-economic analysis interdependence Conclusions
Analysis scales Element Building Neighbourhood/ci ty level
Existing methods Urban scale At urban planning level there were Fingerhuth and Koch who clarified the moderating role of the architect, among experts, passive public and active affected people. At regional planning level it was Strassert (1995) developing a method of balancing we will later employ. Building scale Inclusion of the factor cost into multicriteria decision analysis has been done more recently by the team of Caterino et al (2007 and 2009), with a view to bracing of a reinforced concrete building, but employing passive damping. For technical decision we built upon the book of Malczewski (1999) regarding spatial problems. For the role of the architect Richter (course work) made a role model in the decision space between goals, resources, benefits and costs. In renovation the model used in Weissenhof was described by Nägele (1992). Also Nägele (1992) employed balancing. The ATC-40 considers a series of actors specifically for seismic retrofit. Both the latter employ matrixes (decision tables). The role of the users were considered also by Ottokar Uhl in the model developed for the Hollabrunn in the 1970 s, the glory time of participatism.
Urban scale - Actors Geologist Civil engineer Economicinhabitant Social inhabitant
Building - Actors Architect Civil engineer Social inhabitant Economic investor
Actors in WHE Architect Civil engineer Socio-economic aspects Proiect management
Exemple of interwar building WHE
Building ontology > IT
Indicators building
Indicators in WHE Taxonomy in progress
Urban ontology (COST TU 0801 training school) Sisi
Analitical hierarchy urban
Indicatori - urban
Methods of indicator aggregation pair-wise comparison and outranking techniques were used to weight the relative importance of alternatives in the groups of subcriteria, based on expert knowledge.
Analytical hierarchy building
Interdependence structural – socio-economic
Formulas – principle of addition Total reparation cost = reparation cost for yield/crush colum x nr. of yield crush/columns + Reparation cost for spall column x nr. of spall columns + Reparation cost for rifts colum x nr. of rifted colums + Reparation cost for yield/crush beam x nr. of yield/crush beams + Reparation cost for spall beam x nr. of spall beams + Reparation cost for rifts beam x nr. of rift beams While the numbers can be counted with the procedure shown before Total preventive retrofit costs = Costs for a measures device x nr. of elements Alternatively a project management software can be employed.
Comparison to agent based automated method Computer tools can aid local decision makers in postearthquake disaster staff. Fiedrich (2004) proposed the integrative model EQ-RESQUE to support the prioritisation of intervention zones and the efficient allocation of help-and -rescue resources through action proposals. A distributed simulation system (high level architecture) connects its two interacting components: simulation of the dynamic disaster environment and of the work of resources; decision process modelling using software agents mathematically optimised with expert knowledge concerning the multiple tasks and the communication structures and decision competences within the disaster staff.
Conclusions Positive aspects: Easy to follow and to understand decision process, especially for the stakeholders Drawbacks: Subjective approache to a high degree Improvement proposals: New algorythm ?
Bucharest Thank you Iuliana Armaş Maria Boştenaru
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