Integrated System For Building
Survey And Evaluation Of
Seismic Retrofit Possibilities
M. Bostenaru Dan
Institute for Tech...
Outline
• Introduction
• Romanian building stock
• Building survey
• Retrofit elements for certain building types
• Scale ...
Romanian building stock
• Description of building types
• Available information
• Needed information
Structural systems
Type of load bearing structurematerial
Main type Subtype
wooden floor
vaulted
horizontally laid
unreinf...
Building survey
• 1st Case: seen retrofit elements
• 2nd Case: seen hints in other elements
• 3rd Case: no hints but archi...
Seen retrofit elements on brand
walls
Figure 5: visible vaults
Figure 4: Visible RC frames
with diagonal bracing
Figure 3:...
Unfinished structures
Figure 6: RC frame with reversed
beams
Figure 7: RC frame with light
concrete infill
Figure 8: RC fr...
Building physics hints
Figure 9: Column, thermo-
isolated with masonry
Figure 10: Column not thermo-
isolated
Figure 11: M...
Retrofit elements for certain
building types
• Retrofit elements in building survey
• Retrofit elements in project managem...
Units from which retrofit
elements are derived
Type Subdivision level
#1 #2: element #3 : unit
Load bearing
direction
Soft...
Dividing building
frame
corner
punctual
structure
add
bracing
disipation
element
simple
frames
frame bracing
frames
with b...
Tasks assessment
ID Task Name Duration Predecessors
14 Building up and removing drop tub 4th floor4 hrs 6
15 Building up a...
: Integration of design tasks
Identify
elements
Assess
structural
type
Calculate
costs
Assess
performance
?
Economic
effic...
Conclusions
• building divided into small, manageable
entities, called „retrofit elements“
• „retrofit elements“ serve as ...
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Halkidiki

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STREMAH 2003 Halkidiki, Greece

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Halkidiki

  1. 1. Integrated System For Building Survey And Evaluation Of Seismic Retrofit Possibilities M. Bostenaru Dan Institute for Technology and Management in Construction University of Karlsruhe, Germany
  2. 2. Outline • Introduction • Romanian building stock • Building survey • Retrofit elements for certain building types • Scale of the study • Conclusions
  3. 3. Romanian building stock • Description of building types • Available information • Needed information
  4. 4. Structural systems Type of load bearing structurematerial Main type Subtype wooden floor vaulted horizontally laid unreinforced composite steel with bricks vaulted Masonry brick reinforced with vertical posts and concrete floor slabs beam – column associations moment resisting frame with URM infill with soft storey light concretewith concrete infill unreinforced concrete without soft storey frame frame with concrete shear walls – dual systems wall “fagure” with soft storey precast wall panes cellular without soft storey Structural concrete shear wall spatial elements (made in Craiova) [5] moment resisting frameSteel lightweight
  5. 5. Building survey • 1st Case: seen retrofit elements • 2nd Case: seen hints in other elements • 3rd Case: no hints but architectural style • else
  6. 6. Seen retrofit elements on brand walls Figure 5: visible vaults Figure 4: Visible RC frames with diagonal bracing Figure 3: Visible RC frames
  7. 7. Unfinished structures Figure 6: RC frame with reversed beams Figure 7: RC frame with light concrete infill Figure 8: RC frame with masonry infill
  8. 8. Building physics hints Figure 9: Column, thermo- isolated with masonry Figure 10: Column not thermo- isolated Figure 11: Masonry wall
  9. 9. Retrofit elements for certain building types • Retrofit elements in building survey • Retrofit elements in project management • Retrofit elements in costs calculation • Economic efficiency
  10. 10. Units from which retrofit elements are derived Type Subdivision level #1 #2: element #3 : unit Load bearing direction Soft story columnlinear column punctual Frame Normal storey frame beam 3D net PierOne side Lintel field opening Wall Other side Wall Element Wall Vertical elements One floor Room area floor Other floor Floor element (also out of composite materials) balconies Horizontal elements
  11. 11. Dividing building frame corner punctual structure add bracing disipation element simple frames frame bracing frames with bracing frames linear structure add shearwall frames with infill concrete steel manteling column boundary elements beam columns & beams soft storey combination: linear flat interior exterior reinforcing openings piers lintels fields FRP carbon fibre glas fibre reinforced concrete manteling structural walls slab vaults composite floors flat structures constructive element
  12. 12. Tasks assessment ID Task Name Duration Predecessors 14 Building up and removing drop tub 4th floor4 hrs 6 15 Building up and removing drop tub 6th floor4 hrs 8 16 Building up and removing drop tub 5th floor4 hrs 7 17 Knocking off the masonry wall 33 hrs 18 Knocking off the masonry wall 1st floor23 hrs 11 19 Knocking off the masonry wall 2nd floor23 hrs 12 20 Knocking off the masonry wall 3rd floor23 hrs 13 21 Knocking off the masonry wall 4th floor23 hrs 14 22 Knocking off the masonry wall 5th floor23 hrs 16 23 Knocking off the masonry wall 6th floor23 hrs 15 24 Breaking through the slab 12,5 hrs 31 Cleaning up the masonry 8 hrs? 15 32 Anchoring the reinforcement 20 hrs 39 Formwork 13 hrs 46 Concrete casting 11,5 hrs 53 Removing formwork 12 hrs 60 Removing scaffolding 12 hrs 67 Side 2 70 hrs? T W T F S S M 21 Oct '02 28 Oct '02
  13. 13. : Integration of design tasks Identify elements Assess structural type Calculate costs Assess performance ? Economic efficiency
  14. 14. Conclusions • building divided into small, manageable entities, called „retrofit elements“ • „retrofit elements“ serve as units for – typological classification – modelling for numerical simulation – assignement of tasks for costs calculation • units defined at the begin of design process = integrated system

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