PRESTRESSED CONCRETE IN HIGHWAY BRIDGES AND PAVEMENTS

CONTENTS: ADVANTAGES: REDUCTION IN CRITICAL MATERIALS; REDUCED RATIO DL/LL, PARTICULARLY FOR LONG SPANS; ELIMINATION OF CRACKS. PRETENSIONED WIRES OR STRANDS FOR PRECAST MEMBERS. POST-TENSIONED MULTIPLE WIRE CABLE SYSTEMS. POST-TENSIONED BARS AND CABLES. CONTINUOUS MULTISPAN BRIDGES. PRINCIPLE OF PRESTRESSING WITH REFERENCE TO IMPORTANCE OF HIGH STEEL AND CONCRETE STRESSES. ANALYSIS OF CRITICAL LOADING STAGES. MAGNITUDE AND FREQUENCY OF VIBRATION FOR THIN, PRESTRESSED SLABS. RECOMMENDED STEEL AND CONCRETE STRESSES. FACTORS OF SAFETY. SPECIAL CONSIDERATIONS: IMPORTANCE OF END ANCHORAGE, BOND OF REINFORCING, END BLOCK STRESSES, ETC. CHOICE OF MOST ECONOMICAL PRESTRESSING SYSTEM. COMPARATIVE COST WITH STRUCTURAL STEEL AND REINFORCED CONCRETE. NEED TO ADAPT PRESTRESSING METHODS TO SUIT STANDARD AMERICAN CONSTRUCTION PROCEDURES AND EQUIPMENT. MATERIAL AND LABOR COSTS FOR DIFFERENT SYSTEMS OF PRESTRESSING. REVIEW EXPERIMENTAL PRESTRESSED PAVEMENTS. SUGGEST METHOD TO PRODUCE CONTINUOUS PRESTRESSED PAVEMENTS WITHOUT JOINTS FOR INFINITE LENGTHS. DEFINITIONS AND NOTATIONS. DESIGN CRITERIA. NEED TO OVERCOME DOMINATION OF PATENTS SYSTEMS; ESTABLISHMENT OF CONSULTING ENGINEERS IN PRESTRESSED CONCRETE DESIGN FOR MAJOR STRUCTURES; NEED FOR SIMPLIFIED METHODS OF PRESTRESSING FOR SMALLER STRUCTURES. /AUTHOR/

  • Supplemental Notes:
    • Vol 32, pp 188-208, 4 FIG, 11 PHOT, 14 REF
  • Authors:
    • Dobell, C
    • Erickson, E L
    • Babcock, D P
  • Publication Date: 1953

Media Info

  • Monograph Title: Proceedings of the Thirty-Second Annual Meeting of the Highway Research Board, Washington, D.C., January 13-16, 1953
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00209455
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 1971 12:00AM