DESIGN OF PRESTRESSED CONCRETE FOR SERVICEABILITY

The treatment of cracking and tension stiffening in serviceability calculations for prestressed concrete is not generally understood by practising engineers and has been inappropriately treated in the draft Australian standard for concrete structures. In this report, techniques for the design of prestressed concrete for serviceability are presented. Procedures for the determination of tendon layout and the magnitude of prestress are described. The post-cracking service-load behaviour of a partially prestressed concrete section is also described and analysed. Techniques for calculating flexural rigidity are presented and illustrated by example. The provisions of the new draft standard are criticised and suggestions for improvement are made. In addition, simple procedures for the estimation of both short-term and long-term deflections are also presented. (Author/TRRL)

• Corporate Authors:

  University of New South Wales

  School of Civil Engineering, Anzac Parade
  Kensington, New South Wales  Australia  2033
• Authors:
  • GILBERT, R I
  • Mickleborough, N C
• Publication Date: 1985-6

Media Info

• Features: Figures; References;
• Pagination: 14 p.

Subject/Index Terms

• TRT Terms: Concrete; Concrete structures; Cracking; Deflection; Design; Flexure; Prestressed concrete; Serviceability; Stiffness; Tendons
• Uncontrolled Terms: Concrete cracking
• ITRD Terms: 8006: Australia; 3472: Beam; 4755: Concrete; 5211: Cracking; 4732: Creep (mater); 5586: Deflection; 9011: Design (overall design); 5567: Load; 4787: Partial prestressing; 4796: Prestressed concrete; 4777: Prestressing; 4743: Shrinkage; 187: Specification (standard); 5931: Stiffness; 5502: Tension
• Subject Areas: Bridges and other structures; Design; Highways; Materials;

Filing Info

• Accession Number: 00462591
• Record Type: Publication
• Source Agency: ARRB
• Report/Paper Numbers: NR-224
• Files: ITRD, TRIS, ATRI
• Created Date: Feb 28 1987 12:00AM