DYNAMIC ANALYSIS OF INFINITE BEAM ON MODIFIED VLASOV SUBGRADE

A static method, such as multilayer elastic theory, is commonly used to analyze pavement-subgrade systems under traffic loads. While the static analysis method is sufficient and conservative for daily practice, in some instances, a truly dynamic analysis is necessary for special cases, such as shallow bedrock with high vehicle speed. Furthermore, interpretation of nondestructive testing data from falling-weight deflectometer and Dynaflect tests requires the use of more rigorous dynamic back-calculation techniques. This paper presents an efficient dynamic analysis procedure for the interaction behavior of an infinite beam on a modified Vlasov subgrade. A complete description of the technique is given, followed by a detailed parametric study to examine the effects of subgrade depth, the material stiffness and damping ratio, and vehicle speed on the calculated beam response. Results of analysis indicate that the subgrade depth exerts significant influence on the beam response. Increasing vehicle speed, however, only causes a small increase in dynamic displacement under the load. The paper also offers an efficient back-calculation algorithm based on the derived dynamic compliance function. Two case studies illustrate the accuracy and convergence rate of the developed back-calculation algorithm. The two analysis procedures (forward and back-calculation) are implemented into personal computer based computer program for field application.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8674831
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Liang, R Y
  • Zhu, J X
• Publication Date: 1995-9

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 434-442
• Serial:
  • Journal of Transportation Engineering
  • Volume: 121
  • Issue Number: 5
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-947X
  • Serial URL: https://ascelibrary.org/journal/jtepbs

Subject/Index Terms

• TRT Terms: Algorithms; Backcalculation; Case studies; Dynamic tests; Mineral dislocations; Motor vehicles; Parametric analysis; Pavement layers; Pavement subgrade; Speed; Stiffness; Traffic loads; Traffic speed
• Uncontrolled Terms: Dynamic analysis
• Old TRIS Terms: Layered theories
• Subject Areas: Data and Information Technology; Design; Freight Transportation; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 00711541
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 18 1995 12:00AM