TRUSS ANALOGY FOR SHEAR AND TORSION

Shear and torsion in beams have been the subject of a large amount of research to which Australia has made a substantial contribution. The general consensus of this research is that the truss analogy offers the most rational approach to the problem. This report describes the fundamentals of the truss analogy and its application to the Australian code. Specifically, it introduces the truss analogy through its application to shear in reinforced beams. Various interpretations of this simple analogy are possible, including the Nielson plasticity theory and the Collins compression field theory, as well as the conventional methods included in European codes. Although the method has enormous appeal and can be used to explain a range of shear phenomenom, it is least accurate in a practical area of importance in buildings, namely, beams with light shear reinforcement. For this reason, the draft concrete code has adopted a modified version with a concrete contribution to the strength although full truss methods are still permitted. A particular attraction of the truss analogy is the convenient way it can be extended to torsion. The analogy is also particularly relevant to hollow-box bridge girders. The number of the covering abstract for the conference is TRIS no 394142. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0858252015
• Supplemental Notes:
  • Papers Presented during the Symposium on Concrete 1983, the Material for Tomorrow's Demands, Institution of Engineers, Perth, Australia, 20-21 October 1983.
• Corporate Authors:

  Institution of Engineers

  11 National Circuit
  Barton, A.C.T.,   Australia 
• Authors:
  • Walsh, P F
• Conference:
  • Papers Presented during the Symposium on Concrete 1983, the Material for Tomorrow's Demands, Institution of Engineers, Perth, Australia, 20-21 October 1983.
• Publication Date: 1983-8

Media Info

• Features: Figures; References;
• Pagination: p. 95-99

Subject/Index Terms

• TRT Terms: Beams; Box girders; Building codes; Compression; Concrete; Conferences; Girders; Material reinforcement; Mechanical equilibrium; Plasticity; Prestressed concrete; Reinforced concrete; Reinforcing materials; Shear strength; Standards; Strength of materials; Torsion; Trusses
• Old TRIS Terms: Analogies; Compression field theory; Plastic theory
• ITRD Terms: 3472: Beam; 3474: Box girder; 4755: Concrete; 8525: Conference; 7145: Equilibrium; 4796: Prestressed concrete; 4794: Reinforced concrete; 3471: Reinforcement (in mater); 5531: Shear; 187: Specification (standard); 5544: Strength (mater); 5512: Torsion
• Subject Areas: Bridges and other structures; Design; Highways; Law; Materials; Planning and Forecasting; I24: Design of Bridges and Retaining Walls; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00394153
• Record Type: Publication
• Source Agency: ARRB
• ISBN: 0-85825-201-5
• Report/Paper Numbers: 83/12
• Files: ITRD, TRIS, ATRI
• Created Date: Aug 31 1985 12:00AM