this presentation we have studied long span structre roofing system of Velodrome ,London . We had explains its structure through Plan section and Elevation

1. VELODROME STADIUM
AFSHAN .SAUDAGAR
DANISH .PATHAN

2. North
OLYMPIC PARK MASTER PLAN
• One of the most elegant new
sports halls of Olympia 2012 is
theVelodrome by Hopkins
Architect.
• In contrast to various other
competition venues, the cycling
arena with 6,000 seats created on
the former East way Cycle
Circuit site has been designed as
a permanent building.
SITE PLAN

3. 138 meters
120meters
Location: London , United Kingdom
Architects: Hopkins Architects
Engineer: SBP, Stuttgart (Cable net)
Roof Area: 12000 sqm
Built up: 21,700 sqm
Cable size: 36 mm in dia, 45 km (length)
Completed: January 2011
Capacity 6000
Structural
system:
Form Active: (Cable Net)
Vector Active(Rib Trusses)
Span width: 138 mtrs
138meters
INTRODUCTION

4. 48 Nos. Of
Concrete Columns
2500 Sections
of SteelTrusses
Tension Cable net
Timber panel
with glazed
glass at roof
KEY ELEMENTS
ExplodedView Of Velodrome Showing
Load Carrying key elements
Red Cedar Wood
Facade
Polyester Fabric
coated with PVC
ExplodedView Of Showing
Climate Responsive key elements, & track

5. STRUCTURAL FORCE SYSTEM
1
2
3
4
5
4
3
2
1
5
Forces Acting on Structure
Sr No Type Of Force Acting
1 Cable Tension Acts along the line of roof
2 Cable forces resisted by push pull in steel bowl truss
3 Push and pull transfer into Post tensioned concrete piers
4 Horizontal thrust provided through infield track
5 Supported toe external bridge acts as counter weight foundation
TENSION
COMPRESSION
An Example of how tension
acts n string

6. STRUCTURAL FORCE SYSTEM - TRUSSES
Isometric Section
Cable net
nodes
Ring Beam
Main Truss
Main
Supporting
Piers
Truss gathering tension from
the of and distributes them around .
This Neutralize a large factor of
the horizontal forces present
in the roof cable and effectively
isolates it from the rest of the structure
48 Trusses Arrange n perimeter of ring

7. SADDLE CABLE ROOF SYSTEM
Positive Curvature
Negative Curvature
The Concept of the frame of the tennis
racket could be fixed to the rim of a rigid
bowl, then the bowl could help resist much of
the tension, and the frame could be made
much smaller
Tension
Cables
Ring
beam
Tension in cable
SADDLE ROOF ILLUSTRATION
DEVELOPMENT OF FORM
• The Opposite set of Two set of cable plays off each other
• One set really one to go up and other really want to go down

8. CABLE NODES AND ROOF CONNECTING SYSTEM
Aluminum Standing seam roof
Top cable clamp
Nut
Steel washers
Fabricated Steel
Connection Plate
Fabricated steel powder coated
Receiver brackets
Timber Roof Cassette
300 mm insulation provided
Cover Plate
Bottom cable clamp
Steel middle cable clamp
Components of connection between cable nets
Bottom cable clamp
Top cable clamp
Fixture Detail Node
Wooden ceiling panel attached to Cable Net
Wooden Ceiling Panel
Cable Net

9. NATURAL LIGHT AND VENILATION
Reactions Under DifferentTemperature
Natural Ventilation ,stack effect where cool air
enters from bottom hot air gets out from top
Under seat heating grilles beneath seat provide heat
for competitive atmosphere
Under floor heating from the in field keeps the
track at daily use temperature
Jet Powered heating nozzles installed in the upper tier based
on shoot bust of air to alternate temperature quickly
28+ Degree Celsius
20-28 Degree Celsius
18 Degree Celsius
10-14 Degree Celsius
Roof Plan
Skylight installed
High density polycarbonate sheets

10. CABLES, JACKS AND EXTERNAL CLADDING
The cable net roof is composed of
galvanized steel cables arranged in
pairs, each with a diameter of 36
mm. Hydraulic jacks were used to
tension the cable net until the ends
of the cables could be attached to
tension control bolts connected to
the circular compression member of
the primary structure
Hydraulic Jack fixingTruss
Lifting stages of Cable
Cables laid loose over infield and
clamped together at ground level
Stage 1 of
cable lift
Stage 2 of cable lift – note
slack cables in foreground
5,000 m² of red
cedar wood were used
for the wood façade

11. CONSTRUCTION PROCESS
– 48,000 cubic meters of material was excavated to create the bowl for theVelodrome.
– 900 piles were driven up to 26 meter’s beneath the ground to complete the foundation.
– 2,500 sections of steelwork were installed to complete the steel structure of theVelodrome

12. TABLE OF MEMBERS AND SIZES
SR NO MEMBERS SIZES PHOTO ADDITIONAL
INFORMATION
1 Cable net 36mm in diameter
With a 3.6m grid
Hydraulic jacks were used to
tension the cable net
2 Hydraulic jack 69 Nos. Hydraulic jacks were used to
tension the cable net until
the ends of the cables could
be attached to tension
control bolts connected to
the circular compression
member of the primary
structure
3 Ring truss & Rib truss 48 Nos. These trusses are supported
by sub steel columns on
concrete piers

13. THANKYOU