STRENGTH TEST ON THE ZONE OF A BEAM UNDER FLEXURAL STRESS. INFLUENCE OF PROFILE SHAPE

VERSUCHE ZUR FESTIGKEIT DER BIEGEDRUCKZONE EINFLUSSE DER QUERSCHNITTSFORM

The strength of the compressed zone of a bent beam is characterized by three coefficients the values of which depend on the shape of the transverse section. These coefficients can be calculated for all concrete components using a general theory. This report describes short-term tests carried out to verify the theory for several transverse section shapes (triangular, rectangular and T-shape). Prisms, the section of which varied in shape, were subjected to eccentric loading. Test results agree with theoretical results especially with regard to the ratio of unitary shortening of the compressed zone of the section for all three shapes. This ratio is 1:1.5:2 and remains constant for any quality of concrete. The characteristics of the compressed zone were calculated from the extension-stress curve for the ultimate strength calculation defined in the new specifications DIN 1C45. The curve was plotted using results obtained on rectangular prisms, taking into account the reduction in strength due to fatigue. An attempt is made to verify if this extension-stress curve (which gives exact results for rectangular sections) represents the effect of fatigue for triangular and T-sections accurately. /IRRD/

• Corporate Authors:

  Deutscher Ausschuss fuer Stahlbeton

  Berlin-Wilmersdorf,   Germany 
• Authors:
  • Rusch, H
  • Stoeckl, S
• Publication Date: 1969

Language

• German

Media Info

• Features: Figures; Tables;
• Pagination: p. 26-28
• Serial:
  • Issue Number: 207

Subject/Index Terms

• TRT Terms: Coefficients; Components; Curved beams; Curves (Geometry); Eccentricity; Fatigue (Mechanics); Loads; Shape; Strength of materials; Stresses; Testing; Theory; Ultimate strength
• Uncontrolled Terms: Eccentric loading
• Old TRIS Terms: Test results
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00081815
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Jul 15 1975 12:00AM