EFFECT OF RESTRAINT ON FIRE RESISTANCE OF PRESTRESSED CONCRETE

DESCRIBED IN THIS PAPER ARE RESULTS AND IMPRESSIONS GAINED IN AN EXPLORATORY STUDY OF THE EFFECT OF VARYING INTENSITIES OF RESTRAINT OF THE THERMAL EXPANSION OF PRECAST, PRESTRESSED CONCRETE DOUBLE-TEE FLOOR ELEMENTS DURING THE COURSE OF STANDARD FIRE EXPOSURES. THE PRINCIPAL VARIABLE IN THE STUDY WAS THE AMOUNT OF LINEAR EXPANSION ALONG THE AXIS OF THE SPAN ALLOWED BEFORE FURTHER EXPANSION WAS STOPPED. RELATIONSHIPS BETWEEN GIVEN EXPANSIONS, THE RESULTING EXPANSION FORCES, AND MIDSPAN DEFLECTION ARE PRESENTED. THE CHANGES IN THE LOCATION OF THE CENTER OF THRUST AT THE ENDS OF THE MEMBERS DURING THE COURSE OF THE FIRE EXPOSURE ARE DISCUSSED. FURTHER INVESTIGATIONS ON THE SUBJECT OF RESTRAINT ARE SUGGESTED. /PCA/

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

Media Info

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

Subject/Index Terms

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

Filing Info

• Accession Number: 00213603
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 164
• Files: TRIS
• Created Date: Jun 1 1970 12:00AM