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Maria BOSTENARU DAN

The economic impact of seismic retrofit on heritage buildings with historic reinforced concrete skeleton structure of the interwar time. Maria BOSTENARU DAN. Overview. Introduction The building typology Performance levels and seismic retrofit costs Building modelling

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Maria BOSTENARU DAN

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  1. The economic impact of seismic retrofit on heritage buildings with historic reinforced concrete skeleton structure of the interwar time Maria BOSTENARU DAN

  2. Overview • Introduction • The buildingtypology • Performance levelsandseismicretrofitcosts • Buildingmodelling • Computationmethodology • Structuraldamage • Comparisonofcosts • Output forthedecisionsystem • Outlook tofurtherstudies

  3. The building typology

  4. The RC skeleton building typology in Europe • Studies ofseismic countries: Romania, Italy, Greece, Slovenia, Portugal (forthefirsttwoincludingarchives) • Studies ofother countries presentingthetypology: Poland, Bulgaria, France, Czech Republic, Estonia, Austria, Netherlands, Spain, Germany (the last two moderate seismicity; Germany issteelframe)andof Art Nouveauforerunners (Belgium, Romania, Hungary, Estonia, Finnland, Germany) seehttp://bostenaru.natkat.org/project_results/study_trips.html

  5. The RC skeleton among typologies in Bucharest, Romania • Romanian housing typologies analysed (WHE&beyond) • Historic building with timbered balcony • „wagon“ house (single story brick row) • Two story brick masonry timber floor • Multistory brick masonry steel composite floor • RC skeleton (residential and mixed use) • RC skeleton with RC braces • Cast in situ RC structural walls (vulnerable and not) • Precast RC structural walls • Moment resisting RC frame multistorey (socialist) • Moment resisting RC frame low rise (post 1989) • RC skeleton most vulnerable

  6. Early RC skeleton Bucharest, Romania

  7. Building typology: Romania • Impact of apartment buildings bigger than any other housing • Strong economy, private enterprise • Deviations from mainstream movement dicated by the market • Condominium, like in Greece, until today • Double entrance • Ottulescu building: free plan in an apartment block

  8. Romania

  9. Building typology: Romania

  10. Building typology: Romania Elena Ottulescu building, architect Horia Creangă, 1934-35

  11. Building typology: Italy • Two directions • Rationalism (contextual Modernism) • Giuseppe Terragni • Novecento • Decorative • Geometrical • Novecento: function bound housing typologies, condominium • Zoning: function groups, double entrance

  12. Building typology: Italy • Giuseppe Terragni - Como Photos 2005

  13. Italy • Como

  14. Building typology: Italy • Giuseppe Terragni - Milano Photos 2005

  15. Italy • Milano • Rationalist architecture: blue • Novecento architecture: red

  16. Building typology: Italy • Novecento Photos 2007

  17. Building typology: Italy • Novecento Photos 2007

  18. Building typology: Italy • Novecento Building in Via Domenichino, architects Lancia şi Ponti 1928-30

  19. Building typology: Greece • 1929 – ownership system for multistorey apartments • Housing in private hand, seen to be unique, but similar to Romania and Portugal • Training in Germany, little in France • zonation • Zaimi and Stournary street example: „ressemble Italian rationalism“ – to be investigated • Double entrance

  20. Building typology: Greece Photos 2005

  21. Greece • Athens

  22. Greece building on Zaimi and Stournari streets, architects Valentis and Michailidis, 1933 – 1934

  23. Slovenia • Few reinforced concrete skeleton multi-family housing • Joze Plecnik built housing programmes • The multi-family housing by Plecnik can be found in Vienna (ex. Zacherl house) • Multi-family housing is mainly in brick • Ljubljana was reconstructed after the 1895 earthquake mainly with buildings of Art Nouveau; Modernism and RC came later

  24. Slovenia • Plecnik

  25. Plecnik • In Austria • skeleton • photos 2005-2006

  26. Slovenia

  27. Portugal • RC buildings in the north of the city, where avenues were built in the interwar time • Master Plan according to the 1933 Charter of Athens was done post-war • Traditional floor plans

  28. Portugal Cassiano Branco (photos 2005)

  29. Portugal

  30. Performance levelsandseismicretrofitcosts

  31. Performance levelsandseismicretrofitcosts • Inspiration from studies in the theory of daylight in atria • Depending on the expected earthquake, the measure can be more extensive or not • Adding a second window should be similar to adding a retrofit element and the distance to the amount

  32. Building modelling

  33. Building modelling • Study of the structural typology of early RC • Report for the WHE (extended characteristics) • Study of planimetry to identify typology of distribution of spans and bays in a skeleton • Modelling in the software • Building • Retrofit measures

  34. Computation methodology

  35. Computation methodology • Calculationusingconstructiondevicesfor „retrofitelements“ for • Retrofitmeasures • Repairmeasures after earthquakedamage, depending on damagedegree (thesoftwareallowedtoapplytheretrofitmethod on a predamagedelement) • Computedfollowingperformancecriteriaavailable in fibrebasedsoftware • Option foruseof Project Management software (considering all coststransformed in time) • Calculationusingsurfacesforrebuildingthebuilding in caseof total damage • Useof MS Excellforms • Option foruseofnew BIM software (2011)

  36. Retrofit measure

  37. Repair measure

  38. After supervised work of Öztürk (2003)

  39. Structural damage

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