STRENGTH AND STIFFNESS OF REINFORCED CONCRETE STRUCTURES SUBJECTED TO TORSION IN COMBINATION WITH BENDING AND SHEAR

VRIDHAALLFASTHET OCH VRIDSTYVHET HOS ARMERADE BETCNGKONSTRUKTIONER

Knowledge of the deformation mechanism and variations in stiffness in a concrete structure when this is subjected to torsion, as well as the effect of cracking, is essential for an assessment of deformations and the distribution of forces in statically indeterminate structures. The author reviews pure torsion, in which case there is a flow of shear along the walls of a box section; reinforcement consists of stirrups while compression is assumed to be taken by inclined struts of concrete. Strut inclination can be calculated by the limit state theory, yielding an upper bound of the torsional resistance, or by the energy method which gives a lower bound. In analysing torsional stiffness, it is shown that cracking greatly reduces stiffness. The author also gives formulae for the torsional resistance in combined bending and torsion, both when bending predominates and when torsion is predominant, and also considers the effect of shear force. /TRRL/

• Corporate Authors:

  AM Myggmastarens

  Sveavagan 17
  Stockholm,   Sweden 
• Authors:
  • Cedervall, K
• Publication Date: 1974

Language

• Swedish

Media Info

• Features: Figures; Photos;
• Pagination: 6 p.
• Serial:
  • Byggmastaren
  • Issue Number: 7
  • Publisher: AM Myggmastarens

Subject/Index Terms

• TRT Terms: Bending; Concrete; Concrete structures; Cracking; Deflection; Deformation; Equations; Reinforced concrete; Shear strength; Statically indeterminate frames; Stiffness; Strength of materials; Theory; Torsion
• Uncontrolled Terms: Concrete cracking
• Old TRIS Terms: Statically indeterminate structure
• Subject Areas: Highways; Materials; Planning and Forecasting; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00096781
• Record Type: Publication
• Source Agency: Swedish National Road and Traffic Research Institute
• Files: ITRD, TRIS
• Created Date: Jul 15 1975 12:00AM