01620138

Component

https://doi.org/10.3141/2641-08

Lightweight deflectometers (LWDs) are being used more often for modulus-based quality control of earthwork. One of the practical concerns about implementation of LWDs is that the equation used to estimate the LWD modulus is based on elastic half-space theory and does not account for the nonlinear behavior of soil and soil–impact plate interaction. The finite element method can be used to study the effects of nonlinear behaviors of geomaterials and the soil–plate interaction on the measured deflections. This study provides a means for accounting for the impact of these parameters on the measured responses and the depths of influence. A dynamic finite element model that considers the nonlinear behavior of geomaterials was developed to simulate the LWD on a pavement structure. A comprehensive range of single-layer and two-layer systems with a wide range of properties and thicknesses was considered. Transfer functions were developed to adjust the surface deformations and moduli from the responses obtained from a simple layered elastic static model. The study provides practical relationships that minimize the additional effort in implementing time-consuming dynamic finite element methods. The relationships proposed in this study can be used to estimate more representative target LWD modulus values.

01634655

17-03576

English

pp 58–65

2017

Transportation Research Record: Journal of the Transportation Research Board

9780309441995

Digital/other

Figures (11) ; References (14) ; Tables (4)

Deflectometers; Earthwork; Estimation theory; Finite element method; Modulus; Nonlinear systems; Simulation

Geomaterials; Light weight deflectometers

Geotechnology; Highways; Pavements

TRIS, TRB, ATRI

Dec 8 2016 11:21AM

• Application of the Texas Department of Transportation Continuous Deflection Device to Select Rehabilitation Strategies for Concrete Pavements
• Assessment of Using Inertial Profilers to Measure Ride Quality on Short Projects
• Backcalculation of Flexible Pavement Layer Moduli from Traffic Speed Deflectometer Data
• Characterization of Permanent Deformation Behavior of Silty Sand Subgrade Soil Under Repeated Load Triaxial Tests
• Determination of an Optimum Backcalculation Cross Section for Unconventional Pavement Profiles
• Development of a Mean Profile Depth to Mean Texture Depth Shift Factor for Asphalt Pavements
• Dynamic Backcalculation of Viscoelastic Asphalt Properties and Master Curve Construction
• Evaluation of Moduli and Structural Coefficients of South Carolina’s Asphalt Base Mixtures
• Finite Element Framework for the Computation of Runway Friction of Aircraft Tires
• Finite Element Modeling of Permanent Deformation in the Loaded Wheel Tracker Test
• Implementation of the Structural Condition Index into the Louisiana Pavement Management System Based on Rolling Wheel Deflectometer Testing
• Implementation of the Thin Bonded Concrete Overlay of Existing Asphalt Pavement Design Procedure in the AASHTOWare Pavement ME Design Software
• Nondestructive In Situ Characterization of Elastic Moduli of Full-Depth Reclamation Base Mixtures
• Novel Macro- and Microtexture Indicators for Pavement Friction by Using High-Resolution Three-Dimensional Surface Data
• Research on Comfort and Safety Threshold of Pavement Roughness
• Study of Influence of Operating Parameters on Braking Distance
• Temperature Adjustment for Light Weight Deflectometer Application of Evaluating Asphalt Pavement Structural Bearing Capacity
• Wavelet Analysis to Characterize the Dependency of Vehicular Emissions on Road Roughness