CRACK CONTROL, SERVICEABILITY AND LIMIT DESIGN OF TWO-WAY ACTION SLABS AND PLATES

THIS REPORT IS A CONSOLIDATION OF ALMOST ALL AVAILABLE STUDIES THUS FAR ON THE FLEXURAL CRACKING BEHAVIOR OF TWO-WAY ACTION SLABS AND PLATES. AN ANALYSIS IS MADE OF THE TEST RESULTS OF 90 TWO-WAY ACTION SLABS, BOTH RECTANGULAR AND SQUARE, HAVING VARIOUS BOUNDARY CONDITIONS. THE INTENT IS TO DEVELOP RECOMMENDATIONS TO THE ENGINEERING PROFESSION FOR CRACK CONTROL IN FRAMED STRUCTURAL FLOOR SLABS AND PLATES. IT COVERS BOTH EXPERIMENTAL AND ANALYTICAL STUDIES OF THE CRACKING PROBLEM IN TWO-DIMENSIONAL MEMBERS. THE IMPORTANT FACTORS TAKEN INTO ACCOUNT HAVE BEEN THE DIAMETER AND SPACING OF THE REINFORCEMENT AND THE CONCRETE STRETCHED AREA WHICH IS A FUNCTION OF THE CONCRETE COVER. A BASIC EQUATION FOR CRACK CONTROL OF VARYING DEGREES OF RESTRAINT AT THE BOUNDARIES IS PROPOSED. THROUGH CHOICE OF THE PROPER FRACTURE COEFFICIENT, THE DESIGNER CAN CONTROL THE FLEXURAL CRACK WIDTH IN THE NEGATIVE REGION OF REACTION ZONES OF FLAT PLATES AS WELL AS IN THE NEGATIVE AND POSITIVE MOVEMENT REGIONS OF TWO-WAY ACTION SLABS AND FLAT SLABS. A GRID INDEX IS GIVEN AS A GUIDE FOR GOVERNING THE PRIMARY FAILURE PATTERN WHICH CONTROLS THE CRACK WIDTH.

  • Supplemental Notes:
    • 131 PP
  • Corporate Authors:

    Rutgers University, New Brunswick

    Edward J. Bloustein School of Planning and Public Policy
    33 Livingston Avenue
    New Brunswick, NJ  United States  08901
  • Authors:
    • Nawy, E G
    • Blair, K W
    • Hung, T Y
  • Publication Date: 1972

Subject/Index Terms

Filing Info

  • Accession Number: 00209692
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 9 1972 12:00AM