THE DESIGN OF CONCRETE PAVEMENTS - THEORY AND PRACTICE

BEMESSUNG VON BETONDECKEN - THEORIE UND PRAXIS

THE AUTHOR REVIEWS THE DEVELOPMENT OF THE THEORETICAL BASES OF TRAFFIC LOADING AND TEMPERATURE STRESSES ACCORDING TO HERTZ (1884), WESTERGAARD (1926), BRADBURY (1938) AND EISENMANN. THE INSTANCES OF LOADING AT 'SLAB CENTRE' AND 'SLAB BOUNDARY', THE COEFFICIENT OF SUBGRADE REACTION K, THE ELASTIC MODULUS AND CONTACT FORCES ARE DISCUSSED. ARCHING STRESSES ARE TREATED IN RELATION TO THE TEMPERATURE GRADIENTS AND JOINT SPACINGS. THE ALLOWABLE STRESSES AND THE DETERMINATION OF THE COEFFICIENT OF SUBGRADE REACTION, I.E. THE RELATION BETWEEN THE ELASTIC MODULUS AND THE COEFFICIENT OF SUBGRADE REACTION ARE EXPLAINED. WORKED EXAMPLES ILLUSTRATE THE TEXT. A SECTION IS DEVOTED TO THE COMPOSITE EFFECT OF BOUND ROADBASES AND TO THE TRANSVERSE FORCE TRANSMISSION IN THE AREA OF JOINTS. OF PARTICULAR IMPORTANCE IS A SECTION DEALING WITH PAVEMENT RENEWAL, IN WHICH THREE DIFFERENT CASES (TWO INVOLVING RECONSTRUCTION WITHOUT REMOVAL OF EXISTING SUBGRADE AND THE OTHER WITH REMOVAL) ARE COMPARED WITH ONE ANOTHER. AMONGST THE RECOMMENDATIONS REACHED REGARDING ROAD CONSTRUCTION PRACTICE ARE: THE LAYING OF A CONCRETE SLAB ON HYDRAULICALLY BOUND ROADBASES GIVES RISE TO EARLIER, SIMULTANEOUS AND EVEN CRACKING OF THE DUMMY JOINTS; AN INCREASE IN THE THICKNESS OF THE HYDRAULICALLY BOUND ROADBASE MAKES IT POSSIBLE TO REDUCE THE CONCRETE SLAB THICKNESS; CONCENTRATION OF THE DOWELS IN THE ACTUAL REGION OF THE TRAFFIC LANES; CONTINUOUSLY REINFORCED CONCRETE SLABS WITH CONTROLLED FORMATION OF CRACKING IN RECONSTRUCTION OF SLABS REQUIRE A 16 CM THICK SLAB.

Language

  • German

Media Info

  • Pagination: 17-23
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01302827
  • Record Type: Publication
  • Source Agency: Forschungsgesellschaft für Straßen- und Verkehrswesen (FGSV)
  • Files: ITRD
  • Created Date: Nov 21 2010 8:49AM