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Building 3, Torre Diamante, Milan Structural design of a steel tower
German Steel Day, Aachen, 19/10/2012
Ing. Enrico Manganelli
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The Project: Varesine urban development, Milan
Client: HINES Italia SGR S.p.A. Porta Nuova Varesine
Architect: Kohn Pedersen Fox Associates Pc.
Structural Engineer and technical site support: ARUP
Steel structures: Stahlbau Pichler
Steel producers: (S460M) Arcelor Mittal
Beginning of the design phase: year 2006
End of desing phase: year 2009
Beginning of Construction: year 2009
End of Construction: construction in progress
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Central station Porta Garibaldi
station
Site location
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The Buildings
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• Basements Four storey Basement,
Parking, Concrete
• 1,2 Office, Concrete, Steel Roof
• 3 Office, Steel Composite, Concrete
• 4-9 Low Rise Residential, Concrete
• 10-12 High Rise
Residential,Concrete
• 13 Cultural Centre, Steel,
Composite, Concrete
• GI Commercial, Concrete
1 2
3
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11 10
4-9 GI
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Progetto e re alizzazione della Torre Diamante The Buildings
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100 m
Transverse
Section
General site plan
Lot 1 key sections
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340 m
Longitudinal
section
Lot 1 key sections
Varesine BIM model
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Building 1– transfer beams
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The complex central steel roof structure
retains the landscaped area at ground
level
The General Interest – the central concourse
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Buildings 1 and 2 roof structures
• 30 storeys of office levels
• 4 storey deep basements
• 140m height above Ground level
• Central concrete core
• Composite floors and H beams with HD steel
columns
• Composite columns at B1
• Foundation 2200mm deep concrete raft
• Cranks at level 9 and 21 and up
Building 3 - Torre Diamante - The structure
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• The central concrete core is designed to resist the lateral loads.
• The floor beams are mainly simply supported between the core and the
perimeter columns
• The columns are continous elements in elevation
• Foundation 2200mm deep concrete raft
Building 3 The structural scheme
The axes of the profiles converge at the changes of inclination.
Building 3 – The geometry
3D structural CAD model – the envelope generation
Building 3 The geometry
3D structural CAD model – columns and floor beams generation
Building 3 The geometry
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3D structural fem model – GSA Arup software
Building 3 Stability design
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The “Fin Walls” have been designed to
stiffen the building’s raft foundation.
These walls are the natural extension of the
core walls at the basements levels.
Building 3 Raft foundation and fin walls
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Building 3 Raft foundation and fin walls
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Typical 150mm thick RC slab on dovetail metal decking. This decking
profile allow for more mass than the trapezoidal equivalent therefore it
improves the vibration response of the slab.
A
C
G
I
J
N
O
S
T
Building 3 Typical floor system
HE, IPE steel
beams S355
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xy z
Element l ist: al l not "soletta"
Scale: 1:248.
xy
z
MRR
Scale: 1:235.
Isometric Scale: 1:288.
Maximum Resonant Response Factor: 12.5 /pic.cm
Output axis: global
9.26
7.94
6.62
5.29
3.97
2.65
1.32
0.0
Case: A16 : Footfal l
Floor vibration analyses have been carried out to
investigate the slab response due to the impact of human
activities
Building 3 Floor vibration analysis
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the red vertical strips denote the optimal locations of beam
penetrations
No penetrations in the level 9 beams and we will see why
Building 3 Coordination of beam penetration
Building 3 B1 column
.
LEVEL 1
GROUND
FLOOR
B1
steel ground floor column grade
S460M
LEVEL 1
GROUND
FLOOR
B1
Building 3 Ground floor columns
Progetto e realizzazione della Torre Diamante
Building 3 Gnd floor column erection
- HD Profiles, High strengh
steel grade S460M.
- Column to column splice
connections every 2 levels,
typically.
- 4,1m typical storey height.
Splice bearing joint
Building 3 Superstructure columns
Steel Construction Institute P212
“Joints in steel construction, simple
connections”, 2002
Building 3 Bearing column splice connection
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Building 3 Building 3 Horizontal bracing level 9 (level 22 similar)
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Inclined columns
generate high
outward horizontal
force components at
location of cranks
Building 3 Horizontal bracing - Level 9
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A floor bracing system has been design to transfer the
horizontal forces into the core
A
C
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I
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Building 3 Horizontal bracing - Level 9
Detail of the transfer detail from 3D model
The built detail
Building 3 Horizontal bracing - Level 9
Building 3 Horizontal bracing - Level 9
Building 3 Horizontal bracing - Level 9
Building 3 The completed tower
Building 3 The completed tower
Progetto e realizzazione della Torre Diamante
