Cable Stayed
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Transcript of Cable Stayed
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Cable Stayed Structures:References:
Fuller Moore: Understanding StructuresJames B. Harris, Kevin Pui-K Li: Masted Structures in Architecture
Wolfgang Schueller, The Design of Building Structures
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Carnegie Mellon • Department of Architecture • Third Year Studio
Definition:“Cable-stayed building structures support
horizontal spans by means of diagonal cablessuspended from a higher point. Moore, 1999.
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Carnegie Mellon • Department of Architecture • Third Year Studio
Cable Stayed Bridges
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Carnegie Mellon • Department of Architecture • Third Year Studio
Horizontal & Vertical Reactions
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Carnegie Mellon • Department of Architecture • Third Year Studio
Load Paths
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Carnegie Mellon • Department of Architecture • Third Year Studio
Reactions
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Carnegie Mellon • Department of Architecture • Third Year Studio
Some 19th Century Examples
Friedrich Schnirch; Suspended Theater Roof; 1824
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Carnegie Mellon • Department of Architecture • Third Year Studio
Some 19th Century Examples
J.A. Hittorf; Panorama; 1839
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Carnegie Mellon • Department of Architecture • Third Year Studio
Some 19th Century Examples
C.R. MacIntosh; Greenhouse; 1853
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Carnegie Mellon • Department of Architecture • Third Year Studio
Some 19th Century Examples
Müller & Giese; Auditorium; 1865
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Carnegie Mellon • Department of Architecture • Third Year Studio
Some 20th Century Examples
R. Buckminster Fuller; Dymaxion House; 1927-29
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Carnegie Mellon • Department of Architecture • Third Year Studio
Some 20th Century Examples
E.Bennett & Associates; Pavilion; Chicago; 1933
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Carnegie Mellon • Department of Architecture • Third Year Studio
Some 20th Century Examples
Corlett & Spackman; Stadium; Squaw Valley; 1960
Buckhard; Gymnasium; Ellensburg; 1958
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Carnegie Mellon • Department of Architecture • Third Year Studio
Some 20th Century Examples
London County Council Architects; Crystal Palace Sports Center; 1964
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Carnegie Mellon • Department of Architecture • Third Year Studio
Some 20th Century Examples
P.Zoelly; Exhibition Railway Station; 1964
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Carnegie Mellon • Department of Architecture • Third Year Studio
Some 20th Century Examples
F.Browns; Woking Pool; 1989
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Carnegie Mellon • Department of Architecture • Third Year Studio
Some 20th Century Examples
P.Cox & Partners; Darling Harbor Exhibition Centre; 1986
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Carnegie Mellon • Department of Architecture • Third Year Studio
Some 20th Century Examples
P.Cox & Partners; Darling Harbor Exhibition Centre; 1986
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Carnegie Mellon • Department of Architecture • Third Year Studio
A Taxonomy of Masted Structures• The number, position and relationships of the
basic elements in relation to the pattern ofspaces they define. Harris; 1996.
• Masts, cables & roof beams• Cellular spatial unit• Geometric operation
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Carnegie Mellon • Department of Architecture • Third Year Studio
A Taxonomy of Masted Structures
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Carnegie Mellon • Department of Architecture • Third Year Studio
Structural Behaviour• Vertical Loads
• Uniformly Distributed: applied to the roof beam,supported by stays
• Concentrated: ponding rain or drifting snow; problematicw/ multi–span structures
• Wind Uplift: limit bending in the mast; aerodynamic eaves;secondary tensile system
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Carnegie Mellon • Department of Architecture • Third Year Studio
Structural Behaviour• Stiffness & Deflection
• Not necessarily more or less flexible than conventionalstructures
• Longer spans however mean greater allowable deflection• Details at junctures w/ other building elements become
critical
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Carnegie Mellon • Department of Architecture • Third Year Studio
Structural Behaviour• Temperature Effects
• External Structure: interface between external elements& enclosure needs to allow for movement
• Internal/ External Structure: need to allow for differentialexpansion
• Lightweight of roofing system requires high performancemembranes.
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Carnegie Mellon • Department of Architecture • Third Year Studio
Construction Issues• Cables, Rods or Tubes
• Cables have a low modulus of elasticity, so stretch canbe 4x rods or tubes
• Cables are more difficult to protect• Cable end connections are readily avaiable, but clumsy in
appearance, while rod end connections must be customfabricated through study of design and usage
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Carnegie Mellon • Department of Architecture • Third Year Studio
Benefits and Penalties• Can Meet a Wide Range of Functional Demands• Can Provide Column Free Space Increasing
Internal Flexibility• Can Be Easily Extended• Can Lead to Reduced Structural Weight• Can Lead to Higher Design Costs• Increased Thermal Movement• Erection Requires Special Consideration• Increased Costs for Corrosion Protection
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Carnegie Mellon • Department of Architecture • Third Year Studio
Case Studies: Foster & Rogers