TESTS ON THE REDISTRIBUTION OF FORCES IN STATICALLY INDETERMINATE PRESTRESSED CONCRETE STRUCTURES UNDER THE EFFECT OF CONCRETE CREEP

ESSAIS SUR LA REDISTRIBUTION DES EFFORTS DANS LES STRUCTURES HYPERSTATIQUES EN DETON PRECONTRAINT SOUS L'EFFET DU FLUAGE DU BETON.

Small rectangular concrete beams, with a prestressing cable at the centre of their transverse sections, were tested under long-term loads and with different types of bearing: a) statically determinate beams uniformly loaded, B) uniformly loaded beams supported on three equally spaced bearings; C) beams, which are initially simply supported at their two extremities and then receive additional support in the middle; D) beams with a circular deflection in the middle. The deflections, the local deformations, supports were measured. It was found that the value of creep deformations is smaller than predicted in the fip/ceb recommendations. The influence of the age of load application is fully stressed in these recommendations. The transverse sections remain plane, the variations in the statically indeterminate bearing pressure in beams "C" can be calculated from the variations in the deflections of beams "a", by means of the linear creep theory, which is valid for the interpretation of the tests. /TRRL/

• Corporate Authors:

  Revue de L'Industrie Minerale

  19 rue des Grands Moulins
  F-42 St Etienne,   France 

  Revue de l'Industrie Minerale

  19 rue du Grand Moulin
  St. Etienne (Loire),   France 
• Authors:
  • Fauchart, J
  • Kavyrchine
  • Nung
• Publication Date: 1975-4

Language

• French

Media Info

• Features: Figures; Tables;
• Pagination: p. 211-223
• Serial:
  • Cahiers du Groupe Francais de Rheologie
  • Volume: 3
  • Issue Number: 5

Subject/Index Terms

• TRT Terms: Beams; Bearings; Calculation; Concrete; Conferences; Creep; Deflection; Deformation; Force; Loads; Physical distribution; Prestressed concrete; Prestressing; Statically indeterminate frames; Stresses; Structures; Test procedures; Tests
• Old TRIS Terms: Concrete creep; Statically indeterminate structure
• ITRD Terms: 3472: Beam; 6464: Calculation; 4755: Concrete; 8525: Conference; 4732: Creep (mater); 5586: Deflection; 9016: Distribution (gen); 3355: Engineering structure; 5421: Force; 4796: Prestressed concrete; 5516: Statically indeterminate; 5575: Stress (in material); 6255: Test; 6288: Test method
• Subject Areas: Bridges and other structures; Design; Freight Transportation; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00163191
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: May 18 1978 12:00AM