Cable Suspended Roof-23!10!09

7/16/2019 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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MEMBER

FUNICULAR POLYGN

PP

H = PULL H


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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


8/76SUSPENSION BRIDGE

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


ARRANGE MENTS

L

Cable

Anchoring cables


Mast


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CONVEX LENS - SHAPED CABLE TRUSS


ARRANGE MENTS

L


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

Date post:	30-Oct-2015
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Cable Suspended Roof-23!10!09

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