DEVELOPMENT OF A DESIGN DIAGRAM FOR CALCULATING FOUNDATION SLABS WITH AND WITHOUT SHEAR REINFORCEMENT

AUFSTELLEN VON BEMESSUNGS-DIAGRAMMEN FUER DIE BERECHNUNG VON FUNDAMENTPLATTEN MIT UND OHNE SCHUBBEWEHRUNG

AN EVALUATION OF TESTS ON FOUNDATIONS AT HOME AND ABROAD SHOWED THAT THE PUNCHING THROUGH BEARING CAPACITY OF A FOUNDATION SLAB IS DETERMINED TO A LARGE EXTENT BY THE DEGREE OF BENDING REINFORCEMENT AND THE ABSOLUTE SLAB THICKNESS. BECAUSE OF THE CLOSE RELATION BETWEEN THE BENDING AND THE SHEAR BEARING CAPACITY OF FOUNDATIONS, SEPARATE DESIGN FOR BENDING AND TRANSVERSE FORCE IS NOT POSSIBLE. THE TASK OF DESIGNING A FOUNDATION SLAB IN SUCH A WAY THAT, UNDER PERMISSIBLE WORKING LOAD FOR BENDING THE PERMISSIBLE SHEAR STRESSES ARE SIMULTANEOUSLY UTILISED, CAN ONLY BE ACCOMPLISHED BY LENGTHY ITERATION. FOUNDATIONS ARE OFTEN UNECONOMICALLY DESIGNED - EITHER THEY ARE OVER-CALCULATED FOR BENDING, OR THE SHEAR STRESSES ARE NOT FULLY UTILISED. THE OBJECT OF THE RESEARCH IS TO PROCESS THE RESULTS OF THE STUDY OF THE BEARING CAPACITY OF FOUNDATION SLABS. FOR THIS PURPOSE STANDARD DESIGN DIAGRAMS ARE BEING DEVELOPED, FROM WHICH FOR A GIVEN EARTH PRESSURE AND WIDTH OF FOUNDATION THE REQUIRED DEPTH OF THE BENDING REINFORCEMENT OF A FOUNDATION CAN BE WORKED OUT. IN FOUNDATIONS DESIGNED IN THIS WAY THE SHEAR STRESSES UNDER THE PERMISSIBLE WORKING LOAD FOR BENDING REACH THE TOP SHEAR STRESS LIMIT, SO THAT BENDING AND SHEAR BEARING CAPACITY IS EQUALLY UTILISED.

    Language

    • German

    Project

    • Status: Active
    • Contract Numbers:

      ITRD B15-800178-27

    • Sponsor Organizations:

      BUNDESMINISTER FUER RAUMORDNUNG, BAUWESEN UND STAEDTEBAU (FEDERAL MINISTER FOR REGIONAL PLANNING AND URBAN DEVELOPMENT)

      DEICHMANNSAUE
      BONN,   DEUTSCHLAND BR  D-5300
    • Project Managers:

      DIETERLE, H

      SCHLAICH, J

    • Performing Organizations:

      STUTTGART UNIV. (TH), AMTLICHE FORSCHUNGS- UND MATERIALPRUEFUNGSANSTALT FUER DAS BAUWESEN (OTTO-GRAF-INST.) (TECHNICAL UNIVERSITY OF STUTTGART, OFFICIAL RESEARCH AND TESTING LABORATORY FOR BUILDING MATERIALS (OTTO-GRAF-INSTITUTE))

      PFAFFENWALDRING 4
      STUTTGART,   DEUTSCHLAND BR  D-7000

      STUTTGART UNIV. (TH), INST. FUER MASSIVBAU (TECHNICAL UNIVERSITY OF STUTTGART, INSTITUTE FOR MASSIVE CONSTRUCTION)

      PFAFFENWALDRING 7
      STUTTGART,   DEUTSCHLAND BR  D-7000
    • Start Date: 19780608
    • Expected Completion Date: 19790400
    • Actual Completion Date: 0
    • Source Data: ITRD D701868

    Subject/Index Terms

    Filing Info

    • Accession Number: 01294504
    • Record Type: Research project
    • Source Agency: Bundesanstalt für Straßenwesen (BASt)
    • Contract Numbers: ITRD B15-800178-27
    • Files: ITRD
    • Created Date: Nov 21 2010 4:37AM