Economic efficiency of seismic vulnearbility and retrofit measures - a multicriteria analysi s

1. Economic efficiency of seismic vulnearbility and retrofit measures - a multicriteriaanalysis Iuliana Armaş Maria Boştenaru

2. Overview • Analysis scales • Review existing Methods • Actors • Ontology • Indicators • Analytical hierarchy • Automated methods • Structural – socio-economic analysis interdependence • Conclusions

3. Analysis scales • Element • Building • Neighbourhood/city level

4. 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 1970s, the glory time of participatism.

5. Urban scale - Actors • Geologist • Civil engineer • Economic-inhabitant • Social - inhabitant

6. Building - Actors • Architect • Civil engineer • Social - inhabitant • Economic - investor

7. Actors in WHE • Architect • Civil engineer • Socio-economic aspects • Proiect management

8. Exemple of interwar building WHE • WHE

9. Building ontology > IT

10. Indicators building

11. Indicators in WHE • Taxonomy in progress

12. Urban ontology (COST TU0801 training school) • Sisi

13. Analitical hierarchy urban

14. Indicatori - urban

15. Methods of indicator aggregation • pair-wise comparison and outranking techniques were used to weight the relative importance of alternatives in the groups of sub-criteria, based on expert knowledge.

16. Analytical hierarchy building

17. Interdependence structural – socio-economic

18. Formulas – principle of addition Total reparationcost = reparationcostforyield/crushcolum x nr. ofyieldcrush/columns + Reparation costforspallcolumn x nr. ofspallcolumns + Reparation costforriftscolum x nr. ofriftedcolums + Reparation costforyield/crush beam x nr. ofyield/crushbeams + Reparation costforspall beam x nr. ofspallbeams + Reparation costforrifts beam x nr. ofriftbeams Whilethenumberscanbecountedwiththeprocedureshownbefore Total preventiveretrofitcosts = Costsfor a measuresdevice x nr. ofelements Alternatively a projectmanagementsoftwarecanbeemployed.

19. 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.

20. 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 ?

21. Bucharest Thank you Iuliana Armaş Maria Boştenaru