BART AERIAL STRUCTURES, CREEP AND SHRINKAGE CONTROL. PART 1: DESIGN

FOR 25 MILES OF THE BART SYSTEM, TWIN PRECAST, PRESTRESSED BOX GIRDERS ARE MADE OF CONCRETE CONFORMING TO SPECIAL CREEP AND SHRINKAGE TESTS. REDUCTION IN WATER CONTENT AND USE OF AGGREGATES WITH HIGH ELASTIC MODULUS WERE PRIMARY CONTROL METHODS. RUNNING RAILS WERE INDEPENDENTLY SET TO ACCURATE PROFILE, AND THEN ATTACHED TO THE GIRDERS THROUGH A "SECOND POUR" OF CONCRETE. THE COST OF CREEP AND SHRINKAGE CONTROL WAS 1% OF THE TOTAL COST OF THE STRUCTURES USING SPECIAL CONCRETE. /TRRL/

• Corporate Authors:

  Intl Assoc Bridge & Struct Eng /Switz

  /Design of Concrete Structures Symp
  ,   United States 

  Intl Assoc Bridge & Struct Eng /Switz

  /Design of Concrete Structures Symp
  ,   United States 
• Authors:
  • Kuesel, T R
• Publication Date: 1970-10

Language

• English

Media Info

• Features: Figures; Tables;
• Pagination: p. 231-5
• Serial:
  • Publication of: Intl Assoc Bridge & Struct Eng /Switz/
  • Volume: 6
  • Publisher: Intl Assoc Bridge & Struct Eng /Switz

Subject/Index Terms

• TRT Terms: Box girders; Bridges; Concrete; Creep; Moisture content; Prestressed concrete; Shrinkage
• Old TRIS Terms: Concrete box girders
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00208739
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: TRIS
• Created Date: Jul 9 1972 12:00AM