long span structure 193
TRANSCRIPT
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Single Single StoreyStorey Long Long Span StructureSpan Structure
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Single Single StoreyStorey Long Span StructureLong Span Structure
Classification of structural formsForm active systemsVector active systemsSection active systemsSurface active systems
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Loads acting onto a structural systemsLoads acting onto a structural systems
1. Dead load2. Live load3. Wind load4. Stress created by temperature differences5. Stress created by other form of disruption
including ground movement, vibration, deformation or earthquake
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Materials suitable for constructionMaterials suitable for construction1. All reinforced concrete2. All metal (e.g. mild-steel, stainless steel or
alloyed alumimium, 3. All timber4. Laminated timber5. Metal/RC combined6. Plastic-coated Textile material7. Fiber reinforced plastic
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Form active structural systemsForm active structural systems. . . are systems of flexible, non-rigid matter, in
which the redirection of forces is effected by particular form design and characteristic form stabilization
Example of structures:1. Cable structures2. Tent structures3. Pneumatic structures4. Arch structures
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Parallel cable Radial cable Biaxial cable
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Illustrated examples of parallel cable structures
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Examples of cable structures formed by arch
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Examples of tent structures
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Examples of pneumatic structures
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Examples of pneumatic structures
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Examples of arch structures
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Vector active structural systemsVector active structural systems. . . are systems of short, solid, straight lineal
members, in which the redirection of forces is effected by vector partition, i.e. by multi-directional splitting of single force simply to tension or compressive elements
Example of structures:1. Flat trusses2. Curved trusses3. Space trusses
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Flat truss systems
curved truss systems
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Illustrated examples of flat truss structures
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Illustrated examples of hinged truss structures
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Section active structural systemsSection active structural systems. . . are systems of rigid, solid, linear
elements, in which redirection of forces is effected by mobilization of sectional forces
Example of structures:1. Beam structures2. Frame structures3. Slab structures
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1 & 2 bay beams 1 & 2 bay frames
Beam-grid systems Slab structures
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Hinged frame structures
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Illustrated examples of multi-panel frame structures
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Surface active structural systemsSurface active structural systems. . . are systems of flexible or rigid planes
able to resist tension, compression or shear, in which the redirection of forces is effected by mobilization of sectional forces
Example of structures:1. Plate structures2. Folded structures3. Shell structures
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Shell structures
Folded plate
Multi-bay structures
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Various forms of folded structures
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Examples of shell structures
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Single Single StoreyStorey Long Long Span StructureSpan Structure
Actual Example
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Development History of Long Span Structure
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The development of long span structures
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How arch was constructed to provide a long span roof for traditional western buildings
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Vaulted ceiling
Long span roof structure as seen from the interior
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Exterior view of the Crystal Palace, built in 1851 for the first World Fair
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The Gallery of Machine, constructed in 1889 for the Paris Exhibition
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Simple Example in Hong Kong
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Span about 35m
Member Centre of the Hong Kong Jockey Club
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The Hong Kong coliseum
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The Hong Kong coliseum
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The Hong Kong Stadium
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Other Overseas ExamplesLord’s Mound Stand
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The membrane tented roof of the Lord’s Mound Stand in UK
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Other Overseas ExamplesThe Munich Olympic Stadium
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The Munich Olympic Stadium for the 1972 Olympic
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Detail of the tie member joining nod
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Other Overseas ExamplesThe Melbourne Central
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An openable roof operating on a Rail system
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Other Overseas ExamplesSky Dome, Toronto
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Toronto Tower
The Skydome
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Openable roof
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The Skydome
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Features of the roof system• SkyDome's roof system features a series of 3
moveable panels and 1 stationary panel. • the roof operates on a system of steel tracks and is
powered by a series of DC motors • roof area is 31,525 sq metres • weight is 11,000 tons • span at widest point 209 metres • height is 85m (from field level to highest point) • roofing material is PVC on insulated acoustic steel
deck • 100% of the field & 91% of seating area exposed
with the roof open• pen/close time - 20 minutes (21m per minute)
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Other Overseas ExamplesCharles-de-Gaulle International
Airport, France
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Charles-de-Gaulle International Airport, France, completed in 1998
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Interior view of the airport concourse
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Curving trusses extending from the roof to take up the external glass wall
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The Louisiana Superdome, USA – a 580m clear span sport complex opened in 1975
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Erecting the steel trusses for the Superdome, the towering structures in majority are the temporary supporting to facilitate the erection
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Other Overseas ExamplesTenerife Exhibition Central Stadium
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Tenerife Exhibition Centre in Spain, a shallow arch structure of 270m span completed in 1995.
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85m-span ribbed arch that formed the podium deck of the exhibition space which is constructed by in-situ, post-tensioned concrete
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Lyon-Satolas Airport Railway Station, Lyon, France, completed in 1994. (span 120m)
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Station interior under the 120m span roof
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Example in China –
The Guangzhou Olympus Stadium
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External view of Stadium
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Detail showing the form and shape of the cantilevered roof
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Hoisting the cantilever truss
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Placing the roof truss in position
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Tie systems
Tie systems to stabilize the cantilevered roof
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Enlarged details of the Tie systems
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Decking system of the roof
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Laying of the roof deck
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Semi-cladded roof underside
Piers supporting the cantilever roof truss
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The Guangzhou Gymnasium
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The Shanghai Stadium
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Other Example of Long Span Other Example of Long Span Structure applied in BuildingsStructure applied in Buildings
Structure with span larger than 20m can be regarded as long span structure for this span is usually unable to be achieved by ordinary RC structure.
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Common Structural Forms Common Structural Forms for Long Span Building Structuresfor Long Span Building Structures1. Insitu RC, tensioned2. Precast concrete, tensioned3. Structural steel – erected on spot4. Structural steel – prefabricated and
installed on spot5. Portal frame – insitu RC6. Portal frame – precast7. Portal frame – prefabricated steel
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Common Structural Forms (Cont.)Common Structural Forms (Cont.)
8. Cable suspended structures9. Inflated structure10. Vaulted or ribbed structure11. Dome structure12. Shell structure
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Actual Example –
Hanger structure for HK Aircraft Engineering Company Ltd. (HAECO) at Chek Lap Kok Airprot
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Actual Example –
The Skylight structure of Festival Walk
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The Interior Space under the Sking ring of Festival Walk
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Linking structure between the International Finance Center Phase I and II
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The deck and roof structure of the HK Convention and Exhibition Centre
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Hoisting of the 80m-span roof truss
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Placing of the roof truss at the top of the core wall
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Linking structure between Phase I and II of the HK Convention and Exhibition Centre
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The Peak Tower
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The New Hong Kong International Airport at Chek Lap Kok
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The New Hong Kong International Airport at Chek Lap Kok
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The Sky Dome, Cyber Port
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The Sky Dome, Cyber Port
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Reference:1. Structure systems, by Heino Engel, Verlag Herd
Hatje, 1997
2. Arups on Engineering, by David Dunster, Ernst & Sohn, 1997
3. The Builders – Marvels of Engineering, National Geographical Society, 1992
4. The works of Santiago Calatrava, Taschen, 1998
5. GA Document, Issue 56, October 1998
6. Homepage of Raymond Wong (http://personal.cityu.edu.hk/~bswmwong/)