EXPERIMENTAL STUDY OF DELAYED PHENOMENA IN PRESTRESSED CONCRETE STRUCTURES

It has been found that serious disorders in relatively recent bridges have been attributable to the combined effects of creep and relaxation phenomena in prestressing steels and concrete, and a long-term experimental study was undertaken on the indeterminate forces in prestressed concrete structures in which the static construction diagram varies with time. This study included the instrumentation of several structures at the time of their construction and the time-measurement of certain variable parameters such as reaction, local deformation, deflection, temperature, etc.. A theoretical study was also conducted which took into account the interdependence of concrete creep and prestressing cable relaxation. Theoretical behavior laws were compared with measurements on a bridge for 4 years. The experimental aspects of the research are detailed.

• Corporate Authors:

  Central Laboratory of Bridges & Highways, France

  75732 Paris,   France 
• Authors:
  • Diruy, M
• Publication Date: 1975-12

Language

• French

Media Info

• Features: Figures; References;
• Pagination: 68 p.

Subject/Index Terms

• TRT Terms: Bridge design; Bridges; Cables; Construction; Creep; Deflection; Deformation; Diagrams; Instrumentation; Mechanical relaxation; Prestressed concrete; Prestressing; Research; Steel; Structural design; Temperature; Theory; Time
• Uncontrolled Terms: Experimental data
• Subject Areas: Bridges and other structures; Construction; Highways; Research;

Filing Info

• Accession Number: 00134669
• Record Type: Publication
• Report/Paper Numbers: Res. Rpt. 50
• Files: TRIS
• Created Date: Jun 23 1976 12:00AM