CURRENT VIEWS ON THE REVISION OF AUSTRIAN HIGHWAY DESIGN. ROAD CONSTRUCTION CONFERENCE 1975, 25 YEARS OF THE FGS, 17TH-19TH SEPTEMBER 1975

AKTUELLE BETRACHTUNGEN ZUR NEUFASSUNG DER OESTERREICHISCHEN STRASSENDIMENSIONIERUNG STRASSENBAUTAGUNG 1975, 25 JAHRE FGS, 17-19 SEPTEMBER 1975

THE DRAFT OF THE NEW AUSTRIAN DESIGN CODE IS BASED ON THE ADOPTION OF THEORETICAL DESIGN METHODS. REQUIRED COURSE THICKNESSES ARE ESTIMATED BY CONSIDERING THE STRESSES IN AN ELASTIC SYSTEM. THE SIGNIFICANT DESIGN FACTORS ARE TRAFFIC LOADING EXPRESSED BY REPETITIONS OF A STANDARD 10 TON AXLE LOAD, AND THE LOADED BEHAVIOUR OF THE GROUND AND THE DIFFERENT LAYERS MAKING UP THE ROAD CONSTRUCTION, EXPRESSED IN TERMS OF THE DYNAMIC E-MODULUS. SPECIAL ATTENTION IS DRAWN TO THE SIGNIFICANCE OF THE RELATION OF THE E-MODULI OF THE DIFFERENT MATERIALS. COURSES CONSISTING OF NON-BOUND MATERIALS WHICH ARE VERY WEAK IN TENSION USUALLY EXHIBIT CONSIDERABLY LOWER LOAD-CARRYING CAPACITIES WITHIN THE ROAD MAKE-UP THAN THEIR MATERIAL PARAMETERS INDICATE. THOSE COURSES CONTAINING A BINDER WITH AN UNFAVOURABLE E-MODULUS RATIO CAN LEAD TO VERTICAL AND RADIAL COMPRESSIVE STRESS CONCENTRATIONS, CAUSING CRUSHING AND SPREADING. NEW EXPERIENCE AND KNOWLEDGE ON FROST DAMAGE PREVENTION USING A SUFFICIENTLY THICK FROST BLANKET ARE LIKEWISE TAKEN INTO ACCOUNT IN THE DESIGN METHOD. FROST LIFT DEPENDS ON THE MECHANICAL STRENGTH AND WEIGHT OF THE ROAD SURFACING. IT IS POSSIBLE TO ACHIEVE A TECHNICALLY MORE CORRECT AND OFTEN MORE ECONOMICAL SOLUTION BY USING APPROPRIATELY THICK FROST BLANKETS, AS OPPOSED TO OTHER FROST PROTECTION METHODS.

  • Authors:
    • FUEREDER, H

Language

  • German

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Filing Info

  • Accession Number: 01302049
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD
  • Created Date: Nov 21 2010 8:29AM