Cable Suspended Roof-23!10!09
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Transcript of Cable Suspended Roof-23!10!09
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CABLE SUSPENDED ROOFS
By
J.C.WASON
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FORCES IN A CABLE
H = PULL H
P/2 P/2
P
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A CABLE IS A PURE TENSION STRUCTURAL
MEMBER
FUNICULAR POLYGON
H = PULL H
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A CABLE IS A PURE TENSION STRUCTURAL
MEMBER
FUNICULAR POLYGN
PP
H = PULL H
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A CABLE IS A PURE TENSION STRUCTURAL
MEMBER
FUNICULAR POLYGN
Shape of a suspended cable depends upon loads
suspended from cable.
H = PULL H
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PARABOLIC SAG
FUNICULAR CURVE
H H
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CATEHARY SAG
FUNICULAR CURVE
H H
P1
P2P3
P4
P5
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MAST
SUSPENION
CABLES
BRIDGE DECK
ANCHOR BLOCKS
HANGERS
A SUSPENSION BRIDGE IS A
CABLE SUPPORTED
STRUCTURE
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COMPONENT PART S OF A SUSPENSION
STRUCTURE :
1. Structure (to be suspended)
2. Cable (tension)
3. Mast (Compression member)
4. Uplift Anchorages
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ADVANTAGES & DISADVANTAGES OF
CABLE SUPPORTED SYSTEMS :
ADVANTAGE :
1. Feasibility of large free areas2. Shallower and more economical structure
3. Structural efficiency (cable Tension
Member in steel.)
:DISADVANTAGE :
1. Problem of Stability under strong winds
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In a Traditional Long Structure, the Structure issupported by the Vertical Supports
TRADITIONALLY SUPPORTED
STRUCTURES :
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CABLE SUSPENDED SYTEMS :
In a Cable Suspended System, the Structure is
supported by Cables
structure
Mast
Cables
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SOME TYPICAL
ARRANGEMENTS FOR CABLESUPPORTS SYSTEMS
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TYPES OF PERIMETER SUPPORT
Mast
structure
Cable CablesMast
structure
MASTS ARE SUPPORTING PIERS WHICH
SUPPORTS THE CABLES AND TRANSFERREACTION OF CABLED TO GROUND
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CENTRAL SUPPORTS
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SOME CABLE SUSPENDED
STRUCTURAL ARRANGEMENTS
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Half plan
HALF PLAN
Anchorage Cables
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SUSPENDED ROOFS COVERING TOP FOOR OF
BUILDING
CableMast structure
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CONVEX LENS- SHAPED CABLE TRUS
Cable
Mast
CABLE SUSPENDED ROOFSTIFTENING
ARRANGE MENTS
L
Cable
Anchoring cables
Anchor Blocks Anchor Blocks
Mast
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CONVEX LENS- SHAPED CABLE TRUSS
Cable
Mast
CABLE SUSPENDED ROOFSTIFTENING
ARRANGE MENTS
L
Cable
Anchoring cables
Anchor Blocks Anchor Blocks
Mast
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CONVEX LENS - SHAPED CABLE TRUSS
CABLE SUSPENDED ROOFSTIFTENING
ARRANGE MENTS
L
Anchor Blocks Anchor Blocks
Tie/Anchorage Stabilizing
member
Diagonal strutBearing member
Strut
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CABLE SUSPENDED ROOFS SOME DUBLE
LAYERED STIFFENED SYSTEMS
PLAN
cables
Ring beam
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CABLE SUSPENDED ROOFSSOME DUBLE
LAYERED STIFFENED SYSTEMS
INTERMEDIATE TYPE LENSSHAPED ROOF
COSS - SECTIONS
cable
CONCAVE LENSSHAPED ROOF
CONVEX LENSSHAPED ROOF
Central cageTwin ring
beamsStrut
cable
Twin ring
beams
Central cage
Strut
StrutcableStrut
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STABILIZATION THROUGH TRANSVERSE
CABLES TIED TO GROUND
Anchorage
Primary cable
Edge member
Secondary cable
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INCLINED ARCHES CROSSING EACH OTHER
ABOVE THEIR BASES
Primary cable
Vertical column
Secondary cableEdge member
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INCLINED ARCHES CROSSING EACH OTHER
ABOVE THEIR BASES
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CABLE-STAYED SUSPENSION ROOF
CABLE- SAYED SUSPENSION
ROOF WRITH INTERMEDIATE
SUPPORTS
BEAM STRING ROOF
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CABLE-STAYED SUSPENSION ROOF
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CABLE- SAYED SUSPENSION ROOF WRITH INTERMEDIATE
SUPPORTS
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BEAM STRING ROOF
PRINCIPLES OF SPACE STRUCTURES
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PRINCIPLES OF SPACE STRUCTURES
County, use, date
completed
Size,
areaShape
Structural
type
Roof
cladding
HT Steel in
cable
weight,
kg/sp.m
Supermarket
Athis,Mons, France
43m
spamRectangular
Cable
Truss
Light
Weight2.78
Sport Hall, Sala,
Sweden
43m
spam Rectangular
Cable
Truss
Light
Weight
4.88
Exhibition Hall,
Poznan, Poland
43m
spamRectangular
Cable
Truss
Light
Weight2.59
Sports hall,
Kerkrade, Germany
43m
spam
RectangularCable
Truss
Light
Weight
2.98
Sport Palace,
Helsinki, Finland
43m
spamRectangular
Cable
Truss
Light
Weight5.22
Industrial Building
Pomezia, Italy
43m
spamRectangular
Cable
Truss
Light
Weight2.69
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SUSPENDED ROOF SUPPORTED BY INCLINED
INTERCONNECTED ARCHES
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WAVE FORMED MEMBRANE ROOF
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ANOTHER VERSION OF A PRESTRESSED
SUPENDED ROOF
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ANOTHER VERSION OF PRESTRESSED
SAUSPENDED ROOF
In chined arch
Support for cables
cables Comprn ring
Vertical support
for arch
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BICYCLE WHEEL
Cables
Comprn ring
Tension ring
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THREEWAY SUSPENDED ROOF
Cables
Comprn ring
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CASE STUDIES OF CABLE SUSPENDED
SYSTEMS :
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1. INDRA GANDHI INDOOR STADIUM,
NEW DELHI
I G SPORT TADIUM NEW DELHI
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I.G . SPORT TADIUM, NEW DELHI
Roof :
Octagonal lotus shaped roof lower point 23m above G.L
i. Central compression ring
ii. Steel trusses in the segmental areas between main
RCC column
iii. Roof covering and insulation
COMPRN RING :37.5 m face to face lattice trusses octgonal in plan
SECTING CAPACTY OF STADIUM
25000
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FOUNDATION :-
Driven cast in sits piles, 400 to 500mm dia, 16 to 23m
deep, capacity 70 to 110 tonnes
PARTITION :-
155 m long X 14m high in sulated partition to dividestdium in to two halve, visually and acoustically from
each other.
The lower 22m partition folds up vertically and retracts
into I'm space to give a visually unhindered stadium.
Partition folds up by a push of button in 7 minute time.
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Add Text
SHADDLE
+40 00
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SECTIONAL ELEVATION OFTOWER
ROOF SLAB WITH
ANCHOR BEAM
+35.30m
+35.45m
+23.30m
+18.60m
+14.25m
+8.10m
+3.80m
-0.25m-2.025m
A.H.U ROOM FOR GROUND FLOOR
INTERNAL
STAIR CASE
CONTROL ROOM FORALL ELECTRICAL
A.H.U ROOM FOR STADIUM
ANCHOR
+40.00m
+38.656mCABLES
LOCATION
OF MAIN OF
A RING
ENTRY TO STADIUM
FOYER LEVEL
PODIUM LEVEL
GROUND LEVELRETURN AIR DUCT
SECTION OF PYLON I.G.
STADIUM , NEW DELHI
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1
2
3
4
5
6
7
8
9
10
11
121320
21
22
23
24
25
26
27
28
29
30
31
32
33
34
3536
3738 39 40 41
4243
44
45
46
SEATING LEVEL PLAN
Foldable
partition
40 41 42 43
PUBLIC PLAZA NORTH
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L.G. INDOOR SPORTS
STADIUM FOYER LEVEL
PLAN (AT 8.1 M)
Foldable partition
1
2
3
4
5
6
7
8
9
10
11
12
1314
16171819
2122
23
24
25
26
27
28
29
30
31
32
33
34
35
3637
3839 40
41 42 4344
45
46
1520
47
48
4 2 0 4 8 12 16 20M
VIP SEATS
VIP SEATS
PUBLIC PLAZA SOUTH
PUBLIC PLAZA WEST
PUBLIC PLAZA EAST
SERVICE CORE
SNACK COUNTER
GENTS PUBLIC TOILET
LADIES PUBLIC TOILET
SOME CABLE STRUCTURES
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SOME CABLE STRUCTURES
1. Raleigh Arena (1952)
Covers 205FT X 295FT (90mx 90mx) area with a saddle
shaped cable roof connected to two RCC catenary
Arches, resisting compression.
Arches crossed and deeply embedded. Arches supportedby vertical col. of varying height.
Roof formed by two group of cable, one curved upward
and other curved do inward
Intersection of cables forms a double anticlastic
curvature. Hor thrust from cable is resisted by the
tow inclined RCC arches.
2 Municipal auditorium New York USA
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2. Municipal auditorium, New York, USA
Diameter : 73m (240FT)
Based on bicycle wheel principle. uses to
sets of cable, anchored to a 73m (240FT ) dia. RCC
comprn ring & two steel tension rings , and are kept
apart by pipe spreaders.Comprn ring supported by 24 rect. RCC
cols paced at 150 apart. Each pair of upper and lower
cable space at 50 apart.
dist between upper & lower rings 6m
(20FT). (span / depth rat10= 1/12). The tow seet of
cables used den vibration. (the system also used for
us pavilion at international binge at Brussels
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2. Yale university , hockey rink
A double curyed roof surface
supported at middle by a high arch concrete spine of
Para bock and span72m (235ft). With additional 12m
cantilevers at both ends. cables supported by RCC
pine and two exterior wall deigned to take the lateralthrust from cable.
RALAEIGH ARENA (1952)
Cable suspended roof area covered = 90m x
90m. A saddle shaped cable roof connected to two
RCC Catenary arches, resisting comprn arches on
vertcal cols of varying height.
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Cable roof farmed by two groups of cables
one curved downward and other curved up ward,
forming a surface of double anticlastic curvature.CABLE STAYED BRIDE :-
Specially suited in span range of 200- 500m
cal though large pans also since constructed.
Aesthatically appealing and economical in teel
consumption.
cable stayed bridge are highly indeterminate
structure and need use of computers for rigorousanalysis. Cable stayed bridges for long pans have
become popular because of -
i A variability of high strength steel for cables
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i. A variability of high strength steel for cables
ii. Adoption of orthotropic deck using advanced
welding technique
iii. Use of computer for analysis
MAIN COMPONT OF A CABLE TAYED BRIDGE
i. Inclined cables
ii. Tower ( or Pylons)
iii. Orthotropic deck in teel & prestressed conc. Box
girder deck
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SECTIONAL AND TABILIZATION MECHANIM
Stabilization cable above suspension (convex lens
shaped)
Compreion ringStrut
i i
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SECTIONAL AND TABILIZATION MECHANIM
Stabilization cable below suspension (convex lens
shaped)
Secondary cable
TieTension ringPrimary cable
Compression ring
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DISHED SHELL ROOF
Tension ring Compression ring
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TENT ROOF
Tension ring Compression ringCentral pot
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SINGLY CURVED SINGLE LAYER CABLE
SUPENDED ROOF
Strut
Anchor
Main cable
Roof panel
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DIAMONDSHAPED DOUBLE CURVATURE NET
Secondary cable
Edge member
Primary cable
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CABLE SUSPENDED BRIDGES
(DECK SLAB SUPPORTED BY STEELSUSPENDERS SUSPENDED FROM STEEL CABLES
SUPPORTED BY MASTS)
A SUSPENSION BRIDGE IS A
CABLE SUPPORTED
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SUSPENSION BRIDGE
MAST
SUSPENION
CABLES
BRIDGE DECK
ANCHOR BLOCKS
HANGERS
CABLE SUPPORTED
STRUCTURE
Anchor
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CABLE SUSPENDED BRIDGE WITH STEEL
DECK AND STEEL MASTS
Anchor
Compression ringCable
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MAIN
CABLES
SUSPENDER
CABLES
BRIDGE
DECK
SUPPORTINGMAST
CABLE
SUSPENSION
BRIDGES
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CABLE STAYED BRIDGES
(DECK SLAB SUPPORTED BY STEELCABLES SPLAYED AND SUPPORTED BY
MASTS)
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A CABLE STAYED BRIDGE WITH PRESTRESSED
CONCRETE DECK
(i)
(ii)(ii)
(i)
(iii)
HFL
(i). Steel Cables
(ii). Mast(iii). Bridge Deck
PRESTRESSED
CONCRETE
DECK
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CABLE STAYED BRIDGE - HARP TYPE
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CABLE STAYED BRIDGE - FAN TYPE
HIGH STRENGTH
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AHCHORAGE FOR SUSPENSION BRIDGE
HIGH STRENGTH
CONCRETE
ANCHOR
Rock bed
Cables
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STROMSEND BRIDGE
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CABLE STAYED BRIDGES
- SOME LIVE EXAMPLES
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SEVERIN BRIDGE
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DUSSELDORF BRIDGE
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NORDERELDE BRIDGE
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SECOND HOOGHLY BRIDGE, KOLKATTAA
CABLE STAYED BRIDGE
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CABLE STAYED BRIDGE - HARP TYPE
HIGH STIREHGTH
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AHCHORAGF OF SUSPENIOS BRIDE CABLE
CONC. ANCHOR
Rock bed
Cable
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CABLE STAYED BRIDGE - FAN TYPE
HIGH STRENGTHC bl
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AHCHORAGE FOR SUSPENSION BRIDGE
CONCRETE
ANCHOR
Rock bed
Cables
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THANK YOU