Backcalculation of Layer Moduli using Time History of Embedded Gauge Readings

A prototype-scale asphalt pavement was constructed in the Purdue/INDOT accelerated pavement testing facility. The test section was loaded under constant temperature conditions with a half-axle dual-wheel assembly. During construction, the pavement was instrumented with stress and strain gauges located along and outside the wheel path at different depths. As the loading assembly traversed the test section, the response of the pavement system was monitored by the embedded gauges. In this paper, the time history of the readings is presented and subsequently utilized to backcalculate the resilient mechanical properties of the different layers. For this purpose the pavement system is modeled as a linear-elastic layered medium. Inertial (dynamic) effects are disregarded, and the quasi-static approach is applied for simulating the moving load. The analysis is performed for the pavement after it had incurred 5,000 load applications and separately after 80,000 load applications. Material properties in both cases are presented and compared. Results are also discussed in light of complex modulus testing and Falling Weight Deflectometer data.

[1]  Haiming Huang.  Analysis of accelerated pavement tests and finite element modeling of rutting phenomenon , 1995 .

[2]  Dulcy M. Abraham,et al.  Construction Management of a Small-Scale Accelerated Pavement Testing Facility , 2006 .

[3]  John E. Haddock,et al.  An Accelerated Testing System to Determine Percent Crushed Aggregate Requirements in Bituminous Mixtures , 1990 .

[4]  Jacob Uzan,et al.  CHARACTERIZATION OF GRANULAR MATERIAL , 1985 .

[5]  M. Sugihara.  Methods of numerical integration of oscillatory functions by the DE-formula with the Richardson extrapolation , 1987 .

[6]  A. S. Veletsos,et al.  Stresses and Displacements in Layered Systems , 1959 .

[7]  Rebecca S McDaniel,et al.  Validation of NCAT Structural Test Track Experiment Using INDOT APT Facility , 2008 .

[8]  L. A. Palmer,et al.  THE THEORY OF STRESS AND DISPLACEMENTS IN LAYERED SYSTEMS AND APPLICATIONS TO THE DESIGN OF AIRPORT RUNWAYS , 1944 .

[9]  D. Burmister,et al.  The General Theory of Stresses and Displacements in Layered Soil Systems. II , 1945 .

[10]  Brian D Prowell,et al.  NCAT TEST TRACK DESIGN, CONSTRUCTION, AND PERFORMANCE , 2002 .

[11]  J Uzan.  INFLUENCE OF THE INTERFACE CONDITION ON STRESS DISTRIBUTION IN A LAYERED SYSTEM (ABRIDGEMENT) , 1976 .

[12]  Leon S. Lasdon,et al.  Design and Use of the Microsoft Excel Solver , 1998, Interfaces.

[13]  David H Timm,et al.  Material Properties of the 2003 NCAT Test Track Structural Study , 2006 .

[14]  Jacob Uzan,et al.  Advanced testing and characterization of asphalt concrete materials in tension , 2007 .

[15]  David H Timm,et al.  Design and Instrumentation of the Structural Pavement Experiment at the NCAT Test Track , 2004 .

[16]  David H Timm,et al.  Phase II NCAT Test Track Results , 2006 .

[17]  D H Shields,et al.  Nonlinear viscoelastic behavior of asphalt concrete in stress relaxation , 1998 .

[18]  E. Levenberg,et al.  Interpretation of Complex Modulus Test Results for Asphalt-Aggregate Mixes , 2008 .

[19]  Yang H. Huang,et al.  Pavement analysis and design , 1992 .

[20]  E. Levenberg,et al.  Constitutive Modeling of Asphalt-Aggregate Mixes with Damage and Healing , 2006 .

[21]  Imad L. Al-Qadi,et al.  Viscoelastic Modeling and Field Validation of Flexible Pavements , 2006 .

[22]  Jacob Uzan,et al.  Resilient characterization of pavement materials , 1992 .

[23]  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 .