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Maria BOSTENARU DAN

Maria BOSTENARU DAN

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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