TEST ON A REINFORCED CONCRETE SLAB AND BEAM FLOOR DESIGNED WITH ALLOWANCE FOR MEMBRANE ACTION

TESTS WERE CONDUCTED ON A FOURTH-SCALE NINE-PANEL REINFORCED CONCRETE SLAB AND BEAM FLOOR WHICH WAS DESIGNED WITH ALLOWANCE FOR MEMBRANE ACTION. THE EQUATIONS DERIVED FOR THE ULTIMATE STRENGTH OF REINFORCED CONCRETE SLABS WITH COMPRESSIVE MEMBRANE ACTION WERE USED TO ASSESS THE ENHANCEMENT OF PANEL LOADS. THIS WAS ASSESSED AS SUFFICIENT TO DOUBLE THE JOHANSEN ULTIMATE LOAD OF THE CENTER PANEL. A SMALLER ENHANCEMENT WAS ALLOWED FOR IN THE CENTER-EDGE PANELS AND NONE WAS ALLOWED FOR IN THE DESIGN OF THE CORNER PANELS. THE CENTER SPANS OF ALL BEAMS WERE DESIGNED TO CARRY THE TENSION INDUCED BY THE COMPRESSIVE MEMBRANE FORCES IN THE PANELS. THE RESULTS OF LOAD TESTS ON THE FLOOR ARE REPORTED WITH PARTICULAR REFERENCE TO THE EFFECTS OF MEMBRANE ACTION. SATISFACTORY BEHAVIOR AT SERVICE LOAD WAS OBSERVED AND THE FLOOR CARRIED THE PREDICTED ULTIMATE LOAD BEFORE FAILURE OF THE CENTER PANEL. THE MEASUREMENT OF CONCRETE AND STEEL STRAINS AT CRITICAL SECTIONS REVEALED THE PRESENCE OF COMPRESSIVE MEMBRANE FORCES IN THE CENTER PANEL AND TENSIONS IN THE BEAMS THAT WERE OF THE ORDER EXPECTED. /ACI/

  • Authors:
    • Hopkins, D C
    • Park, R
  • Publication Date: 1972-1

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00209673
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 9 1972 12:00AM