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Presentation to ERES 2001
Malaga, Spain
September 2001
Dipl.-Ing. Maria Bostenaru
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
4-6.09.2001 ERES 2001
Malaga, Spain
Calculation of Costs for Seismic Rehabilitation of Historical Buildings
Maria Bostenar...
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ERES 2001, Malaga, Spain

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Transcript of "Malaga"

  1. 1. Presentation to ERES 2001 Malaga, Spain September 2001 Dipl.-Ing. Maria Bostenaru
  2. 2. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Structure • Introduction • Requirements on this methodology • General methods for costs planing • Special conditions for retrofitting existing buildings • Costs calculation methodology • Conclusions
  3. 3. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Introduction • Disaster prevention has growing importance • retrofit measures – structural aspects – functional aspects – aesthetic aspects – economic efficiency • building retrofit | building rehabilitation • information on the building ist required • methods on costs estimation available only in some countries
  4. 4. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Requirements on this methodology • should not require location specific values (major goal) • flexible – applicable in different regions – adaptable to different requirements process – extensible according to the growth of knowledge in this field • computer based – extensible to net
  5. 5. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY General methods of costs planing • Planing the costs – a method – an adequate structuring of the building object – scheduling of the structural elements and their quantity – documentation of the results – analysis – optimising alternative • range influenced by data availability and not from target precision • strong relation between data collected and costs estimation methods in a particular country (FEMA, BKI)
  6. 6. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY General methods of costs planing • New buildings • Existing buildings
  7. 7. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY New buildings • 2 main German indexes – costs estimation • building divided into spaces with different functions • key area types • database with similar buildings • applicable in incipient stages of planning – costs calculation • building elements are classified after their execution type • different deepness levels in the structure • applicable in later stages of planning
  8. 8. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Existing buildings • costs evaluation methods for upgrading existing buildings only developed beginning with the last decade • systems used by calculation methodologies: – space usage – building surfaces – building elements – execution steps • methodology of Rolf Neddermann: „old building types“ – ready-made service packs during the planning within the element methodology
  9. 9. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Special conditions for retrofitting existing buildings • Performance level • Decision support • Types of buildings – Inter-bellum Bucharest buildings – Retrofit consideration about historical buildings
  10. 10. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Performance level • Objectives – immediate occupancy – damage control – life safety upgrading existing buildings seismic retrofit rehabilitation expense degree performance objectives damage degree present danger degree
  11. 11. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Decision support • local measures – similar to usual renewal of old buildings • global measures – new elements have to be build in • this methodology creates a framework, in which further values, coming from static calculations can be introduced
  12. 12. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Decision support between local and global measures allowed strain existing strain first measures level: repairing second measures level: isolated elements retrofit third measures level: whole building retrofit
  13. 13. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Types of buildings • historical buildings in town analysis – cultural value • belong to national heritage • no statistical approaches possible – architectural value • representative for a certain building style • retrofit methods restricted through the characteristics of that style – environmental value • with positive influence on the townscape • the building record is the basis for town image analysis
  14. 14. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Inter-bellum Bucharest buildings(1920-45) • mainly residential buildings – 7-11 floors high apartment blocks • RC frame structure with URM masonry infill – designed to resist vertical loads only • non contextual architectural approach – set landmarks in the build context • stylistically very close to turn-of-century European styles – lack of ornaments – aesthetics through simplicity – emphasis of horizontal lines – recesses in the facade
  15. 15. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Costs calculation method Marcel Iancu building (about 1935), 3 Pictor St. Luchian Street Street front with an inter-bellum building
  16. 16. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Retrofit considerations about historical buildings • this methodology breaks up with the statistics – customised approach of different kinds of buildings allowed • guidelines about the characteristics to be maintained • catalogue of adequate building elements • consulting an architect still needed
  17. 17. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Costs calculation methodology • The building record • Retrofit elements • Spatial relationship • Database
  18. 18. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY The building record • different detailing ranges • focus on the elements on the last division level • focus on the structural elements – damages – bearing/non bearing parts • RVS to identify where to search after structural details • the record methodology must allow computer assistance but be easy to make with low-end equipment • the data have to be stored in a room book – static measures have to be divided accordingly
  19. 19. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Retrofit elements • The result of retrofit measures are building elements • further division levels – walls in their bearing and non bearing parts – bearing parts into linear, surface and node elements • a retrofit element consists of all works which have to be done in order to strengthen, repair, build a constructive component – old elements (strengthened ones) – new elements (added to the build substance) – retrofitted elements (old elements with new extensions) – replaced elements (new elements instead of deteriorated old ones)
  20. 20. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Retrofit elements and retrofitted elements columns beams concrete extention slot reinforcement diagonale braces stiffening structural connected parts steel masonry concrete manteling columns parts included in other assemblies single parts structural parts openings "line" elements
  21. 21. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Gebäudestruktur II interior wall exterior wall bracing partial manteling complet frame field frame construction units of the structural parts partial interior wall webbing plates concrete manteling facade manteling partition wall (between buildings) exterior wall total bearing walls floors "surface" elements (also parts)
  22. 22. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Retrofit elements • required – clear identification of the building elements – marking of the elements in the 3D model • building elements can be edited as service specification – Tendering-Allocation-Billing modules • elements consist of service specification positions given in a database • element costs are not statistically calculated • element costs are leaded back to the execution steps which caused them
  23. 23. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Surface elements • posterior mounting of slabs in reinforced concrete frames – 5700 - 6700 DM/frame – 2000 - 2350 DM/m3concrete 1 3 4 2 5 1 6 6 2 1. vorhandene Stütze, 2. vorhandenes Fundament, 3. nachträglicheingebaute Scheibe, 4. nachträgliche Fundamentergänzung,5. Bewehrung, 6. nachrägliche Querschnittserweiterung F • Posterior mounting of diagonals in reinforced concrete frames – 6800 - 7300 DM/frame V- oder K- Anordnung X- Anordnung
  24. 24. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Retrofit Elements • Diminution of the rigidity – 100 DM/field Kautschuk 1 1 1 1 8 2 7 5 3 6 4 9 10 1. alter Beton, 2. beschädigter alter Beton, 3. neuer Beton, 4. ausgeknickte Bewehrung, 5. neue Bewehrung, 6. neue Bügel, 7. Schweißnaht, 8. alte Bügel, 9. alte Bewehrung, 10. Schalung • Retrofit of a column
  25. 25. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Example 4 3 1 : Mauerwerk : Stahlbeton 2 4,00m 3,00m 2,88m 5,00m Scaffolding area 4*6*3,00*5,00= 360m² Masonry to be broken away 4*6*4,00*2,88*0,36= 99,54m³ Masonry to be cleaned up 4*6*4,00*2,88*0,36= 99,54m³ concrete (d= 25cm) 4*6*2,88*4,00*0,25= 69,12m³ Steel (reinforcement: ca. 120kg/m³) 120*69,12= 8294,40kg formwork 2*4*6*4,00*2,88= 553,00m²
  26. 26. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Example Scaffolding area 4*6*3,00*5,00= 360m² Masonry to be broken away 4*6*4,00*2,88*0,36= 99,54m³ Masonry to be cleaned up 4*6*4,00*2,88*0,36= 99,54m³ concrete (d= 25cm) 4*6*2,88*4,00*0,25= 69,12m³ Steel (reinforcement: ca. 120kg/m³) 120*69,12= 8294,40kg formwork 2*4*6*4,00*2,88= 553,00m² Material Costs concrete 200,00*69,12= 13824,00DM steel 8294,40*1,00= 8294,40DM anchorelements 5,65*60*4*6= 8136,00DM sum 30254,40DM process costs 1.put up the scaffolding 16,00*360,00= 5760,00DM 2. screening 72,00*2*4= 576,00DM 3. put up and away the waste tub 72,00*4*4= 1152,00DM 4. break away masonry wall 72,00*5,60*99,54= 40134,53DM 5. floor break through 4*6*2*175,00= 8400,00DM 6.clean up of masonry broken away (25,00+11,50)* 99,54m³= 3633,21DM 7. reinforce – anchoring of the reinforcement into existing reinforced concrete frames (72,00/60*8294,40)= 9953,28DM (4*6*72,00*10)= 17280,00DM 9953,28+17280,00= 27233,28DM 8. casing 4*6*72,00*3= 5184,00DM 9. paving over 4*6*72,00*1,5= 2592,00DM 10. casing away 4*6*72,00*2= 5184,00DM 99849,02DM
  27. 27. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Spatial relationship • Building divided in – points (nodes) – lines (beams and columns) – areas (Floors and walls) • executed works are related to this elements • static programs can communicate with this elements • the elements will be assigned in a GI-System using the concepts of edge, surface and node
  28. 28. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Database measures book spatial model (GIS) static room book building elements service directory 1 1 1 1 n n n n
  29. 29. 4-6.09.2001 ERES 2001 Malaga, Spain Calculation of Costs for Seismic Rehabilitation of Historical Buildings Maria Bostenaru, University of Karlsruhe, GERMANY Conclusion • The method wasn't‘t applied until now – no statements about certainty degree • a service directory can be hold out from the same database • modular structure – allows generalisation – values can be stored in a standardised format in order to build a database of retrofitted objects • costs estimation for similar future projects
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