VISCOELASTIC MODEL FOR ELASTOMERIC PAVEMENT JOINT SEALS

THIS PAPER DESCRIBES THE DEVELOPMENT OF A SIMPLE VISCOELASTIC MODEL TO SIMULATE THE TIME-DEPENDENT BEHAVIOR OF ELASTOMERIC SEALS. THE MODEL CHOSEN FOR DEMONSTRATION IS THE PARAMETER SOLID. STANDARD RESPONSES OF THIS MODEL ARE BRIEFLY DESCRIBED AND ARE FOLLOWED BY APPROPRIATE ANALYTICAL EXPRESSIONS. THE ANALYTICAL EXPRESSIONS ARE GIVEN IN A GENERAL FORM AND REFER TO THREE PARTICULAR CASES: (A) RESPONSE TO A FIXED LEVEL OF DEFORMATION THAT HAS BEEN HELD FOR A SPECIFIED LENGTH OF TIME, (B) RESPONSE ON RELEASE FROM SUCH A FIXED LEVEL OF DEFORMATION, AND (C) LOAD- DEFLECTION RESPONSE IN AN EXPERIMENT AT A CONSTANT RATE OF DISPLACEMENT. THE REQUIRED PARAMETERS OF THE MODEL ARE EVALUATED BY USING THE EXPERIMENTAL VALUES OBTAINED FOR AN ACTUAL SEAL. THE PERFORMANCE OF THE SEAL IS THEN COMPARED WITH THAT OF THE MODEL. THE MODEL ENABLES SOME IMPORTANT ACCEPTABLE PREDICTIONS TO BE MADE: (A) RESIDUAL DEFORMATIONS OCCUR IMMEDIATELY ON RELEASE FROM A FIXED LEVEL OF COMPRESSION, (B) THE SUBSEQUENT RECOVERY OF THE SEAL AS A FUNCTION OF TIME, (C) THE DECAY OF THE EFFECTIVE FORCE EXERTED BY THE SEAL, AND (D) THE EFFECT OF THE DISPLACEMENT RATE ON THE LOAD-DEFLECTION CHARACTERISTIC. SUGGESTIONS FOR FURTHER REFINEMENT OF THE MODEL ARE ALSO GIVEN. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1972/389/389-006.pdf
• Supplemental Notes:
  • Sponsored by Committee on Sealants and Fillers for Joints and Cracks. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Vyas, Ravindra K
• Publication Date: 1972

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 40-48
• Monograph Title: Concrete pavement construction and joint sealants
• Serial:
  • Highway Research Record
  • Issue Number: 389
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Deformation; Elastomers; Joint sealers; Mathematical models; Time; Viscoelasticity
• Uncontrolled Terms: Models
• Old TRIS Terms: Time effects
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00207468
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Sep 19 1972 12:00AM