An Efficient and Accurate Genetic Algorithm for Backcalculation of Flexible Pavement Layer Moduli

Details

• Creators:
  Pan, Ernian ; Sangghaleh, Ali ; Molavi, Amirhossein ; Zhao, Yanfei ; Yi, Ping
• Corporate Creators:
  University of Akron. Department of Civil Engineering
• Corporate Contributors:
  Ohio. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Overlays (Pavements)
  • Elastic analysis
  • Structural analysis
  • Elasticity (Mechanics)
  • Backcalculation
  • Statistical analysis
  • Multilayer
  • Elastic modulus and thickness
  • Pavement analysis
  • Backcalculation
  More +
• Publication/ Report Number:
  FHWA/OH-2012/18
• Resource Type:
  Tech Report
• Geographical Coverage:
  Ohio
• Edition:
  Final report.
• Corporate Publisher:
  Ohio. Dept. of Transportation. Office of Research and Development
• Abstract:
  The importance of a backcalculation method in the analysis of elastic modulus in pavement engineering has been ; known for decades. Despite many backcalculation programs employing different backcalculation procedures and ; algorithms, accurate inverse of the pavement layer moduli is still very challenging. In this work, a detailed study on ; the backcalculation of pavement layer elastic modulus and thickness using genetic algorithm is presented. Falling ; weight deflectometer (FWD) data is generated by applying a load to the pavement and measuring pavement ; deflection at various fixed distances from the load center. The measurement errors in FWD data are simulated by ; perturbing the theoretical deflections. Based on these data, backcalculation technique is performed using an ; improved genetic algorithm (GA). Besides root mean square (RMS), another objective function called area value ; with correction factor (AVCF) is proposed for accurate backcalculation of pavement modulus and thickness. The ; proposed backcalculation method utilizes the efficient and accurate program MultiSmart3D for the forward ; calculation and it can backcalculate the modulus and thickness simultaneously for any number of pavement layers. ; A simple, user-friendly, and comprehensive program called BackGenetic3D is developed using this new ; backcalculation method which can be utilized for any layered structures in science and engineering.
  More +
• Format:
  PDF
• Funding:
  134481
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25435/dot_25435_DS1.pdf
• File Type:
  [PDF - 8.23 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:d200ef46032aa2db90a5dc75e42c6f1f9960092ee4fb8de25572713bd9086331aed589e03394dc6241d599177d2be10e3c4114b73f6e1ec9197d1f73a132e345