ON IMPROVEMENTS OF THE EXISTING VESYS-CONCEPTS. SIXTH INTERNATIONAL CONFERENCE, STRUCTURAL DESIGN OF ASPHALT PAVEMENTS, VOLUME I, PROCEEDINGS, UNIVERSITY OF MICHIGAN, JULY 13-17, 1987, ANN ARBOR, MICHIGAN

The existing VESYS programs provide engineers not only with a new philosophy how to handle a management system by means of a performance predicting calculation program but also support design engineers with a suitable calculation method. The programs enable us to calculate the progress of PSI (Present Serviceability Index) by means of theoretical treatments. Otherwise PSI could only be obtained by measurements. About 8 years ago we started to scrutinize those VESYS programs which were available for us. A lot of special measurements were carried out to support our theoretical considerations. Instead of improving parts of existing programs we started to develop a new version which is called VESYS 3H (H stands for Hannover). In this program particularly the calculations of ruts and cracks had been changed. Measurements have shown that longitudinal roughness of roads is correlated to non-uniformities of the road bodies, which are spatially destributed by chance. So far, it seems to be very hard to predict slope variance.

• Corporate Authors:

  University of Michigan, Ann Arbor

  Department of Civil Engineering
  Ann Arbor, MI  United States  48109
• Authors:
  • BECKEDAHL, H
  • GERLACH, A
  • Lucke, H
  • Schwaderer, W
• Publication Date: 1987

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 677-691
• Serial:
  • Publication of: Michigan University, Ann Arbor
  • Publisher: University of Michigan, Ann Arbor

Subject/Index Terms

• TRT Terms: Asphalt pavements; Computer programs; Conferences; Cracking; Forecasting; Pavement performance; Ruts (Pavements); Serviceability
• Uncontrolled Terms: Rut; Serviceability Index
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00485634
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 31 1989 12:00AM