University of Sydney –Building Principles Peter Smith 1998/Mike Rosenman 2000 What is a truss a truss is an assembly of linear members connected together to form a triangle or triangles that convert all external forces into axial compression or tension in its members Single or number of triangles a triangle is the simplest stable shape Joints assumed frictionless hinges 1/27 loads placed at joints
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University of Sydney –Building Principles Trusses Peter Smith 1998/Mike Rosenman 2000 l What is a truss a truss is an assembly of linear members connected.
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University of Sydney –Building Principles Trusses
Peter Smith 1998/Mike Rosenman 2000
What is a trussa truss is an assembly of linear members connected together to form a triangle or triangles that convert all external forces into axial compression or tension in its members
Single or number of triangles
a triangle is the simplest stable shape
Joints assumed frictionless hinges
1/27
loads placed at joints
University of Sydney –Building Principles Trusses
Peter Smith 1998/Mike Rosenman 2000
Primitive dwelling
heavy timber trusses
Rafter pair - Joistsimple roof constructionloading along rafters - bending
Simple Truss
2/27
University of Sydney –Building Principles Trusses
Peter Smith 1998/Mike Rosenman 2000
Depthor Rise
Panel
Span
Flat Truss or Parallel Chord Truss
Vertical Diagonal
WebMembers
(verticals & diagonals)
Top Chord
Bottom ChordJoint,Panel pointor Node
3/27
University of Sydney –Building Principles Trusses
Peter Smith 1998/Mike Rosenman 2000
BowstringFlat Pratt Triangular Howe
Flat Howe Inverted Bowstring Simple Fink
Warren Fink
Camelback Triangular Pratt Cambered Fink
Scissors Shed
Lenticular
4/27
University of Sydney –Building Principles Trusses
Peter Smith 1998/Mike Rosenman 2000
A truss provides depth with less material than a
beam It can use small pieces Light open appearance (if seen) Many shapes possible
5/27
University of Sydney –Building Principles Trusses
Peter Smith 1998/Mike Rosenman 2000
Multipanel TrussesSainsbury Centre
Norwich, England
Foster & PartnersAnthony Hunt Associates
Warren TrussesCentre Georges Pompidou
Paris
Piano & RogersOve Arup & Partners
Shaping Structures: Statics, W. Zalewski and E. Allen (1998)6/27
University of Sydney –Building Principles Trusses
Peter Smith 1998/Mike Rosenman 2000
Shaping Structures: Statics, W. Zalewski and E. Allen (1998)
3-Hinged Truss ArchesWaterloo Terminal for Chunnel Trains
Nicholas Grimshaw & PartnersAnthony Hunt Associates
7/27
University of Sydney –Building Principles Trusses
Peter Smith 1998/Mike Rosenman 2000
Stadium AustraliaHomebush, Sydney, 1999
Bligh Lobb Sports ArchitectsSinclair Knight Merz (SKM) Modus Consulting Engineers