I S O S LAB
Insert a picture here
C.A.S.E. PROJECT AND ISOSLAB TECHNOLOGY
Simple and safe construction in seismic areas
Mauro Sartori
Developed in collaboration with Studio Calvi
What is ISOSLAB?
Istanbul, 10/12/2014
•
Provides architects and
developers a seism-free area on
which one can build with very
limited consideration for seismic
conditions
•
Base Isolation principle to
uncouple the building from the
ground vibrations
•
Very limited constraint on the
building
•
Development of a simplified
method for the design and the
supply of the ISOSLAB
technology as a KIT
2
A design principle : Base Isolation
Design approach according to European Standard (EN 1998)
The seismic effects are reduced and the design will be made without
plastic deformation:
• The structure will NOT be damaged (NO plastic hinges)
• The design DOES NOT follow principles of high ductility
• The stability is NOT obtained increasing the structural resistance
Fc3
• The serviceability IS GRANTED after a seismic event
• The structure is designed to remain ELASTIC under
REDUCED ACTIONS.
• Reduced perception of shaking
Istanbul, 10/12/2014
3
Fc2
Dc1
Fc1
Fi3
Fi2
Fi1
A design principle : Base Isolation
The base isolation is the only way to
protect both the structure and the
non-structural parts and its
contents
Istanbul, 10/12/2014
4
L’Aquila C.A.S.E. project (Italy)
183 buildings on 7320 Sliding Pendulum Isolators
(4896 supplied by ALGA)
Istanbul, 10/12/2014
5
L’Aquila C.A.S.E. project (Italy)
• C.A.S.E. stays for “Complessi Antisismici Sostenibili
Ecocompatibili (Anti-seismic Sustainable Eco-compatible
Complexes),
• but also CASE = HOMES
• C.A.S.E. is the largest base isolation project of the world consisting
in 185 apartment buildings supported on 7400 sliding pendulum
isolators
• Peculiar aspect of the project is that is has been completed in 8
months giving a home to 12.000 people after the earthquake of 6
April 2009 in L’Aquila
Istanbul, 10/12/2014
6
L’Aquila C.A.S.E. project (Italy)
The conceptual design:
•
•
•
•
•
Foundation slab in reinforced concrete of 18 x 54 x 0.5 m
40 columns in steel or reinforced concrete
40 isolators on top of the columns
Concrete slab of 18 x 54 x 0.5 m
All supporting an apartment building
Istanbul, 10/12/2014
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L’Aquila C.A.S.E. project (Italy)
Supply of isolators
Istanbul, 10/12/2014
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L’Aquila C.A.S.E. project (Italy)
The location of the 19 sites where the 185 buildings have
been erected
Istanbul, 10/12/2014
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L’Aquila C.A.S.E. project (Italy)
Response Spectrum
adopted
Technical Properties
• R = 4000 mm
• m=3%
• T = 3.2 s
• dbd = 260 mm
• V = 3000 kN
Istanbul, 10/12/2014
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L’Aquila C.A.S.E. project (Italy)
Istanbul, 10/12/2014
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L’Aquila C.A.S.E. project (Italy)
Istanbul, 10/12/2014
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L’Aquila C.A.S.E. project (Italy)
Istanbul, 10/12/2014
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L’Aquila C.A.S.E. project (Italy)
Test on Complete Structure
Istanbul, 10/12/2014
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ISOSLAB: Main Components
ISOSLAB
POST TENSIONED
POST TENSIONED
Istanbul, 10/12/2014
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ISOSLAB: Post-Tensioned Slabs
WITHOUT SLAB
CAPITAL
WITH SLAB
CAPITAL
The thickness of the isolated slab
ranges
from 350 mm to 650 mm
Istanbul, 10/12/2014
In case slab capitals are necessary, their
dimension is related to the thickness of the slab
(according to EC2 prescriptions)
16
ISOSLAB: the B range system
• Designed for flat slabs
• CE marked
• > 10 000 tons of slab post tensioning
installed each year
• > 200 000 anchorages supplied each
year
Istanbul, 10/12/2014
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ISOSLAB: Columns
• A catalog of standard columns designed to support the supestructure
weight and to bear the isolators
C
D
A
F
B
E
Reinforced concrete rebar
Steel circular hollow section
Steel S460
Steel S355
Istanbul, 10/12/2014
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G
ISOSLAB: ISOSISM® PS Isolators
The isolation technology is based on the principle of the Pendulum System (PS)
Single
Double
Single Sliding Surface
Two types of bearings are
used
Istanbul, 10/12/2014
Double Sliding Surface
19
ISOSLAB: ISOSISM® PS Isolators
• Single or Double curvature depending on the displacement demand
• HOTSLIDE : An Exclusive Sliding Material
• Developed with Politecnico di Milano
• Pending international patents
• Outstanding sustainability to high pressure
• Resisitance to wear
• Constant behaviour under high teperatures
Istanbul, 10/12/2014
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ISOSLAB: ISOSISM® PS Isolators
• Extensive testing in independent laboratories
150
• > 5000 units installed up to date
100
50
Force (kN)
• 20000 kN max capacity
0
-100
-80
-60
-40
-20
0
-50
• 1200 mm displ. capacity
-100
-150
Disp (m m )
Istanbul, 10/12/2014
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20
40
60
80
100
ISOSLAB: Isolated slab dimensions
The slabs are a combination of 8 m x 8m squares,optimal dimension for
the design of a car parking system between the slabs
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ISOSLAB: A basement designed as a car park
• The 8x8 column grid is designed to allow for conveniently using the
basement as a car park
Istanbul, 10/12/2014
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ISOSLAB: Configurations regarding ground level
LEVEL LAND
HILLY AREA
The extrados of the foundation slab is at the
ground level
Excavations works are carried out
The undestructure is protected by a retaining wall
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ISOSLAB: Configurations regarding ground level
PARKING SYSTEM UNDERGROUND
Oblique trench
Footbridge between the ground and the
isolated slab
Istanbul, 10/12/2014
Straight trench
Retaining wall to counteract the ground
26
Urban Block : architectonical design
Slab dimension: 202 m x 202 m
Istanbul, 10/12/2014
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ISOSLAB: Procedure for the preliminary design
• Limited constraints on the building resting on the ISOSLAB
• Up to 9 storeys
• Maximum floor weight during earthquake
(including live load): 10 kN/m2, averaged
on a 8x8m2 area.
• Resistance to static horizontal load
applied to the building floors equivalent
to a lateral acceleration of 0.15 g.
• The superstructure does not cause local
actions in the isolated slab that are larger
than the one caused by the chosen design
load uniformly applied on this slab.
Istanbul, 10/12/2014
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ISOSLAB: Procedure for the preliminary design
• Only simple data needed to design the
ISOSLAB :
• PGA
• Soil conditions
• Slab dimensions and occupation factor of
the isolated slab
• Number of floors
• Typical weight per sqm of floor
Istanbul, 10/12/2014
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ISOSLAB: Procedure for the preliminary design
Output of the design software
-
Isolated slab thickness
Foundation slab thickness
Type of column
Type of isolators and dimensions
Concrete grade
Material quantites
Istanbul, 10/12/2014
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ISOSLAB: Structural checking at the execution stage
Concrete wall resisting structure
PLAN VIEW
TRANSVERSAL SECTION
LONGITUDINAL SECTION
FINITE ELEMENT
MODEL
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ISOSLAB: Construction sequence
Casting the foundation slab
Installating the columns
Installating the isolators
Installating the isolated slab formwork
Istanbul, 10/12/2014
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ISOSLAB: Construction sequence
Casting the isolated slab
Erecting the superstructure
Occupied building
Istanbul, 10/12/2014
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ISOSLAB: Freyssinet scope of work
• Freyssinet can assist in designing &
constructing your seismic proof building at
different stages of the project
• Engineering
•
Preliminary design of the ISOSLAB
•
Detailed design of the ISOSLAB
•
Assistance to design the building
•
Checking of the building under seismic conditions
• Construction
•
Supply of the ISOSLAB kit
•
Technical assistance for construction of the ISOSLAB
•
Turn key construction of the ISOSLAB
Istanbul, 10/12/2014
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Other retrofitting projects in L’Aquila
Project : RETROFITTING OF THE COURT IN L’AQUILA
Position : L’Aquila (Italy)
Type : PS 3000/400
PS 5000/400
Radius : 5000mm
Quantity : 114 pcs
Year : 2011
Istanbul, 10/12/2014
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Other retrofitting projects in L’Aquila
YY
TAVS13
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RETROFITTING OF THE COURT IN
L’AQUILA
A
0. 30
Pil. 45
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B
Pil. 24
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Project :
A
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Pil. 35
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A
Pil. 23
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A
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b6
2. 76
a16
3. 34
b17
YY
TAVS13
Istanbul, 10/12/2014
Building regular in plan for geometry
but not for stiffness
Other retrofitting projects in L’Aquila
Project : RETROFITTING OF HIGH SCHOOL ‘SERPIERI’ IN AVEZZANO
Position : Avezzano (Italy)
Type :
PS 1500/620
PS 2500/620
PS 4000/620
Radius : 4000mm
Quantity: 143 pcs
Year : 2011
Istanbul, 10/12/2014
Other retrofitting projects in L’Aquila
Project : RETROFITTING OF HIGH SCHOOL ‘G. GALILEI’ IN AVEZZANO
• Building not regular in plan
Istanbul, 10/12/2014
Other retrofitting projects in L’Aquila
Project : RETROFITTING OF HIGH SCHOOL ‘SERPIERI’ IN AVEZZANO
Position: Avezzano (Italy)
Type : PS 1500/620
Radius : 4000mm
Quantity : 105 pcs
Year : 2011
Istanbul, 10/12/2014
Other retrofitting projects in L’Aquila
Project : RETROFITTING OF HIGH SCHOOL ‘SERPIERI’ IN AVEZZANO
• Building not regular in plan
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
How to install the isolators in an existing building?
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Details of the reinforcements applied to the column
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Placing the secondary clamps
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Placing the primary clamps
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Tensioning of the bars
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Loading the vertical jacks
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Cutting the column by diamond wire
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
The cut completed
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Grouting of the sole plates
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Placing the isolator
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Isolators and steel strengthening placed
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
The job almost completed
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Detail of the external walls
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Detail of the external walls and gap
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Detail of the external walls
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Cover of the isolators (optional)
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Typical detail of the structure adjacent to the isolator
Istanbul, 10/12/2014
RETROFITTING OF AN EXISTING BUIDING
Typical detail of the connecting plates of the isolator to the
structure
Istanbul, 10/12/2014
I S O S LAB
Thanks for your attention
m.sartori@alga.it