Halkidiki

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

Outline

• Introduction

• Romanian building stock

• Building survey

• Retrofit elements for certain building types

• Scale of the study

• Conclusions

Romanian building stock

• Description of building types

• Available information

• Needed information

Structural systems Type of load bearing structure material 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 concrete with 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 frame Steel lightweight

Building survey

• 1st Case: seen retrofit elements

• 2nd Case: seen hints in other elements

• 3rd Case: no hints but architectural style

• else

Seen retrofit elements on brand walls

Figure 5: visible vaults

Figure 4: Visible RC frames with diagonal bracing

Figure 3: Visible RC frames

Unfinished structures

Figure 6: RC frame with reversed

beams

Figure 7: RC frame with light

concrete infill

Figure 8: RC frame with masonry infill

Building physics hints

Figure 9: Column, thermo-

isolated with masonry

Figure 10: Column not thermo-

isolated

Figure 11: Masonry wall

Retrofit elements for certain building types

• Retrofit elements in building survey

• Retrofit elements in project management

• Retrofit elements in costs calculation

• Economic efficiency

Units from which retrofit elements are derived

Type Subdivision level #1 #2: element #3 : unit

Load bearing direction

Soft story column linear column

punctual

Frame Normal storey frame

beam

3D net

Pier One 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

Dividing building

framecorner

punctualstructure

addbracing

disipationelement

simpleframes

frame bracing

frameswith bracing

frames

linear structure

addshearwall

frameswith infill

concrete steel

manteling

column

boundaryelements

beam

columns& beams

soft storey

combination:linear

flat

interior exterior

reinforcing

openings piers lintels fields

FRP carbonfibre

glasfibre

reinforcedconcrete

manteling

structural walls

slab vaults composite

floors

flat structures

constructive element

Tasks assessmentID 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 M21 Oct '02 28 Oct '02

: Integration of design tasks

Identifyelements

Assessstructural

type

Calculatecosts

Assessperformance

?Economicefficiency

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