Mechanistic–empirical analysis of the results of finite element analysis on flexible pavement with geogrid base reinforcement

A finite-element response model was developed using ABAQUS software package to investigate the effect of geogrid base reinforcement on the response of a flexible pavement structure. Finite-element analyses were then conducted on different unreinforced and geogrid-reinforced flexible pavement sections. In this analysis, the base course (BC) layer was modelled using an elasto-plastic bounding surface model. The results of the finite-element analyses showed that the geogrid reinforcement reduced the lateral strains within the BC and subgrade layers, the vertical strain and shear strain at top of subgrade, and the surface permanent deformation. The higher tensile modulus geogrid resulted in larger reduction of surface permanent deformation. Based on the response parameters computed from the finite element analysis, the improvement of using geogrid for BC reinforcement was then evaluated using the damage models for rutting in the mechanistic–empirical method developed through NCHRP Project 1-37a. The results of mechanistic–empirical analyses showed that the traffic benefit ratio values can reach as high as 3.7 for thin base pavement section built over weak subgrade using high tensile modulus geogrid.

[1]  S W Perkins,et al.  Geosynthetic Reinforcement of Flexible Pavements: Laboratory Based Pavement Test Sections , 1999 .

[2]  Qiming Chen,et al.  Evaluation of geogrid base reinforcement in flexible pavement using cyclic plate load testing , 2011 .

[3]  Munir D. Nazzal.  Laboratory Characterization and Numerical Modeling of Geogrid Reinforced Bases in Flexible Pavements , 2007 .

[4]  Imad L. Al-Qadi,et al.  LABORATORY EVALUATION OF GEOSYNTHETIC-REINFORCED PAVEMENT SECTIONS , 1994 .

[5]  Murad Abu-Farsakh,et al.  Implementation of a Critical State Two-Surface Model to Evaluate the Response of Geosynthetic Reinforced Pavements , 2010 .

[6]  Erol Tutumluer,et al.  Aggregate base residual stresses affecting geogrid reinforced flexible pavement response , 2008 .

[7]  Hoe I. Ling,et al.  Finite Element Studies of Asphalt Concrete Pavement Reinforced with Geogrid , 2003 .

[8]  S W Perkins,et al.  A mechanistic–empirical model for base-reinforced flexible pavements , 2009 .

[9]  S W Perkins,et al.  Finite Element and Distress Models for Geosynthetic-reinforced Pavements , 2002 .

[10]  Erol Tutumluer,et al.  Development of a mechanistic model for geosynthetic-reinforced flexible pavements , 2005 .

[11]  S W Perkins,et al.  DEVELOPMENT OF DESIGN METHODS FOR GEOSYNTHETIC REINFORCED FLEXIBLE PAVEMENTS , 2004 .

[12]  R. D. Espinoza,et al.  Soil-geotextile interaction: Evaluation of membrane support , 1994 .

[13]  Ralph Haas,et al.  GEOGRID REINFORCEMENT OF GRANULAR BASES IN FLEXIBLE PAVEMENTS , 1988 .

[14]  F Montanelli,et al.  IN-GROUND TEST FOR GEOSYNTHETIC REINFORCED FLEXIBLE PAVED ROADS , 1999 .

[15]  Final Document,et al.  Guide for Mechanistic-Empirical Design OF NEW AND REHABILITATED PAVEMENT STRUCTURES FINAL DOCUMENT APPENDIX QQ : STRUCTURAL RESPONSE MODELS FOR RIGID PAVEMENTS NCHRP , 2004 .

[16]  Norihiko Miura,et al.  Polymer grid reinforced pavement on soft clay grounds , 1990 .

[17]  Baoshan Huang,et al.  Numerical Simulation of Geosynthetic-Reinforced Flexible Pavements , 1996 .

[18]  S W Perkins,et al.  Evaluation of base-reinforced pavements using a heavy vehicle simulator , 2005 .

[19]  J. C. Small,et al.  Effect of Geogrid Reinforcement in Model Track Tests on Pavements , 1996 .

[20]  Thomas C. Kinney,et al.  Benefits of Using Geogrids for Base Reinforcement with Regard to Rutting , 1998 .

[21]  F Montanelli,et al.  GEOSYNTHETIC-REINFORCED PAVEMENT SYSTEM: TESTING AND DESIGN , 1997 .

[22]  Imad L. Al-Qadi,et al.  Geogrid in Flexible Pavements , 2008 .

[23]  J. G. Collin,et al.  Full Scale Highway Load Test of Flexible Pavement Systems with Geogrid Reinforced Base Courses , 1996 .

[24]  R. D. Barksdale,et al.  Potential benefits of geosynthetics in flexible pavement systems , 1989 .

[25]  Heinz Konietzky,et al.  Use of DEM to model the interlocking effect of geogrids under static and cyclic loading , 2004 .

[26]  S. Emerson,et al.  AASHTO (American Association of State Highway and Transportation Officials). 2001. A Policy on Geometric Design of Highways and Streets. Fourth Edition. Washington, D.C. , 2007 .

[27]  Steve L Webster,et al.  Geogrid Reinforced Base Courses for Flexible Pavements for Light Aircraft: Test Section Construction, Behavior Under Traffic, Laboratory Tests, and Design Criteria , 1993 .

[28]  Leonard R. Herrmann,et al.  Bounding surface plasticity. II: application to isotropic cohesive soils , 1986 .

[29]  S. F. Brown,et al.  Discrete element modelling of geogrid-reinforced aggregates , 2006 .