A REVIEW OF STUDIES OF THE EFFECTS OF RESTRAINT ON THE FIRE RESISTANCE OF PRESTRESSED CONCRETE

SOME OF THE HIGHLIGHTS ARE REVIEWED OF STUDIES CONDUCTED BY THE PORTLAND CEMENT ASSOCIATION OF THE EFFECT OF RESTRAINT OF THERMAL EXPANSION ON THE FIRE RESISTANCE OF CONCRETE WITH PARTICULAR REFERENCE TO PRESTRESSED CONCRETE. INCLUDED ARE DISCUSSIONS OF THE MECHANISMS AFFECTING STRUCTURAL BEHAVIOR IN FIRE OF FLEXURAL MEMBERS WHICH ARE SIMPLY SUPPORTED, AXIALLY RESTRAINED AND CONTINUOUS. BIAXIAL RESTRAINT OF FLOOR AND ROOF CONSTRUCTIONS IS BRIEFLY DISCUSSED. THE STRUCTURAL FIRE ENDURANCE OF SIMPLY SUPPORTED PRESTRESSED AND CONVENTIONALLY REINFORCED FLEXURAL MEMBERS, DEPENDS LARGELY UPON THE STRENGTH OF THE STEEL AS IT BECOMES HEATED TO INCREASINGLY HIGHER TEMPERATURES. RESTRAINT MAY BE EXPECTED TO CONTRIBUTE SUBSTANTIALLY TO IMPROVED STRUCTURAL FIRE ENDURANCE OVER A FAIRLY WIDE RANGE OF ALLOWED EXPANSION. FULL RESTRAINT IS NOT LIKELY TO BE REALIZED IN A BUILDING FIRE. CONTINUITY WILL GENERALLY ENHANCE THE FIRE RESISTANCE OF FLEXURAL CONSTRUCTIONS. /PCA/

• Authors:
  • Carlson, C C
  • Selvaggio, S L
  • Gustaferro, A H
• Publication Date: 0

Media Info

• Serial:
  • Portland Cement Assoc R & D Lab Bull
  • Issue Number: 0

Subject/Index Terms

• TRT Terms: Constraints; Fire resistance; Flexure; Prestressed concrete; Reinforced concrete; Thermal expansion
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213640
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 206
• Files: TRIS
• Created Date: Jun 1 1970 12:00AM