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An Evaluation Of Flexible Pavement Performance On The Basis Of Deflection Basins Using Illipave Program
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Book Synopsis An Evaluation of Flexible Pavement Performance on the Basis of Deflection Basins Using Illipave Program by : Suzanna Darmstater
Download or read book An Evaluation of Flexible Pavement Performance on the Basis of Deflection Basins Using Illipave Program written by Suzanna Darmstater and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flexible Pavement Performance Evaluation Using Deflection Criteria by : R. J. Wedner
Download or read book Flexible Pavement Performance Evaluation Using Deflection Criteria written by R. J. Wedner and published by . This book was released on 1980 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Project monitored flexible pavement dynamic deflections, roughness, and distress over a six-year period. Results show present surface condition and serve as a basis for evaluating rehabilitation needs.
Book Synopsis Analysis of Flexible Pavement on the Basis of Deflection Basins by : Dinesh M. Kamath
Download or read book Analysis of Flexible Pavement on the Basis of Deflection Basins written by Dinesh M. Kamath and published by . This book was released on 1987 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flexible Pavement Condition Evaluation Using Deflection Basin Parameters and Dynamic Finite Element Analysis Implemented by Artificial Neural Networks by : Ranjithan, SR.
Download or read book Flexible Pavement Condition Evaluation Using Deflection Basin Parameters and Dynamic Finite Element Analysis Implemented by Artificial Neural Networks written by Ranjithan, SR. and published by . This book was released on 2000 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a methodology based on deflection basin parameters and artificial neural networks (ANNs) for processing dynamic falling weight deflectometer (FWD) measurements to estimate layer moduli and condition. Two-dimensional, dynamic, finite element analysis using the ABAQUS program was employed to develop the deflection information for this study. Unlike the majority of the existing backcalculation programs that iteratively adjust all the layer moduli to match the measured deflections, the proposed method first determines the subgrade modulus by means of two deflection basin parameters, Base Damage Index and Shape Factor F2, and then applies the estimated subgrade modulus and other parameters as input variables to a trained ANN to estimate the upper layers' moduli. Procedures in predicting layer moduli for both two- and three-layer pavement systems are presented. Field FWD measurements were analyzed both by this method and by the MODULUS program, the results of which assess the capability of the proposed method. Effects of discontinuities in the asphalt layer on the resulting FWD deflections were also studied using the finite element method. It was discovered that distresses in the asphalt layer may be detected using two deflection basin parameters, Shape Factor F2 and AREA.
Book Synopsis Evaluation of a Dynamic Load Inducing Device by : Kamran Majidzadeh
Download or read book Evaluation of a Dynamic Load Inducing Device written by Kamran Majidzadeh and published by . This book was released on 1977 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanistic-empirical Evaluation of the Mn/Road Mainline Flexible Pavement Sections by : Claribel Alvarez
Download or read book Mechanistic-empirical Evaluation of the Mn/Road Mainline Flexible Pavement Sections written by Claribel Alvarez and published by . This book was released on 1998 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study utilized Illinois DOT (IDOT) mechanistic-empirical (M-E) technology and Mn/ROAD mainline pavement section data and information to verify/refine/modify IDOT M-E analysis and design concepts and procedures for full-depth asphalt concrete (FDAC) and conventional flexible pavements (CFP). The Mn/ROAD mainline flexible pavements include eleven CFP and three FDAC pavement sections. Four different granular materials were used in the conventional flexible pavements. A fine-grained soil subgrade (R-value of about 12) is present throughout the mainline. Laboratory material testing results, field distress measurements, and FWD test data were used to study pavement deflection response and performance (rutting and asphalt concrete fatigue). The study demonstrated that the IDOT M-E analysis and design procedures for FDAC and CFP sections are adequate. The ILLI-PA VE structural model adequately predicts the pavement responses. The use of bi-linear (arithmetic) subgrade model and the "theta" granular material model ILLI-PA VE inputs closely replicate CFP field FWD deflection responses. The effect of granular material quality on CFP deflection response is very limited. The ILLI-PAVE FWD backcalculation algorithms are adequate for estimating the moduli of asphalt concrete and sub grade soils.
Book Synopsis Mechanistic Interpretation of Nondestructive Pavement Testing Deflections by : Mario S. Hoffman
Download or read book Mechanistic Interpretation of Nondestructive Pavement Testing Deflections written by Mario S. Hoffman and published by . This book was released on 1981 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Deflections as an Indicator of Flexible Pavement Performance by : Frank Patterson Nichols
Download or read book Deflections as an Indicator of Flexible Pavement Performance written by Frank Patterson Nichols and published by . This book was released on 1962 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of Deflection Basins for Structural Evaluation of Flexible Pavements by : Nouman A. Ali
Download or read book Use of Deflection Basins for Structural Evaluation of Flexible Pavements written by Nouman A. Ali and published by . This book was released on 1986 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanistic-empirical Evaluation of the Mn/Road Low Volume Road Test Sections by : Navneet Garg
Download or read book Mechanistic-empirical Evaluation of the Mn/Road Low Volume Road Test Sections written by Navneet Garg and published by . This book was released on 1998 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study utilized I DOT mechanistic-empirical (M-E) procedures and Mn/ROAD low-volume road (LVR) data and information to verify/refine/modify analysis and design concepts and procedures for L VR flexible pavements. The Mn/ROAD L VR flexible pavements include conventional flexible, full-depth asphalt, surface-treatment and aggregate-surface sections. Laboratory test results, field distress measurements, and FWD test data were used to study the affect of granular material quality on pavement performance and deflection response. The results from the rapid shear tests, permanent deformation tests and field rutting measurements show that granular material rutting potential can be characterized by a rapid shear triaxial test at 15-psi confining pressure. For conventional flexible pavements, granular material quality did not affect the pavement deflection response, but material quality effects were significant for aggregate-surface and surface-treatment pavements. ILLI-PAVE predicted pavement responses were fairly accurate for sections with thicker asphalt concrete surfaces. The FWD deflection basin parameter AUPP (Area Under Pavement Profile) can be used to predict the strains at the bottom of AC layer. Effect of subgrade type on pavement response and performance was studied. Sandy subgrades showed little or no change in pavement structural response due to spring-thaw effects. For the cohesive subgrade sections, moisture changes and spring-thaw effects increased surface deflections. The study showed that the lOOT LVR flexible pavement mechanistic-empirical design concepts and procedures are valid and adequate.
Book Synopsis Master's Theses in the Natural and Technical Sciences by :
Download or read book Master's Theses in the Natural and Technical Sciences written by and published by . This book was released on 1990 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Cracking on the Deflection Basin of Flexible Pavements by : Hadi Mohamed Omar
Download or read book The Effect of Cracking on the Deflection Basin of Flexible Pavements written by Hadi Mohamed Omar and published by . This book was released on 1997 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Evaluation of Flexible Pavement Using Deflection Basin by :
Download or read book Structural Evaluation of Flexible Pavement Using Deflection Basin written by and published by . This book was released on 1989 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a methodology for testing, evaluation and determination of overlay thickness required for a given pavement section. The overlay design procedure presented makes use of some of the recent developments for analysis and design of asphaltic concrete overlays. The evaluation of in-service pavements includes the use of the deflection parameters developed by testing of the existing pavements with known geometry for determining the moduli of various pavement layers and the required overlay thickness. The method utilizes empirical values and VESYS structural subsystem as an integral approach complementary to each other. Six pavement sections across the State of North Carolina were selected for deflection testing. Deflection parameters were developed to characterize the deflection data from these pavement sections. In addition, VESYS structural system was used to develop nomographs for the interpretation of the measured deflection basin parameters. These nomographs were used to backcalculate the layer moduli form deflection parameters and known layer thicknesses using iterative solutions. The backcalculated layer moduli from these nomographs correspond to the climate conditions that happen to exist during the time of testing and must therefore be adjusted to other climatic conditions. A procedure for such an adjustment is also included in the design procedure. Many different methods have been developed for determining an overlay thickness. These methods can be categorized in three groups : component analysis, deflection based, and analytically based. A mechanistic procedure is described in this paper. This procedure is based on the data and findings of a previous research and has been used to evaluate in-service pavements in North Carolina using Falling Weight Deflectometer (FWD) deflection parameters. The procedure includes four major parts : (a) FWD deflection parameters and data collection, (b) back-calculation of layer moduli, (c) adjustment of layer moduli and (d) prediction of overlay thickness. For the covering abstract of this Conference see IRRD abstract number 853851.
Book Synopsis A Method for Evaluating the Structural Performance of Subgrades And/or the Overlying Flexible Pavements by : Nari K. Vaswani
Download or read book A Method for Evaluating the Structural Performance of Subgrades And/or the Overlying Flexible Pavements written by Nari K. Vaswani and published by . This book was released on 1970 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The structural evaluation of flexible pavement is now carried out mostly by deflection measuring devices such as the dynaflect or Benkelman beam. The object of this investigation was to determine whether the properties of the deflected basin measured by these devices on the pavement surfaces could enable evaluation of the subgrade and/or its overlying pavement separately. The properties of the deflected basin are defined by the maximum deflection and the spreadability, which is the average deflection expressed as a percentage of the maximum deflection. A theoretical analysis showed that these properties are a function of the modulus of elasticity of the subgrade, the average modulus of elasticity of the pavement over the subgrade, and the thickness index of the overlying pavement. A general chart was developed which correlates maximum deflection and spreadability with (i) the subgrade strength, (ii) the average pavement strength, and (iii) the thickness index of the pavement. This chart was tested for structural evaluations of the subgrade and/or its overlying pavement for satellite projects in Virginia. Ten typical examples of the satellite projects are given in the report and the change in their structural behavior with time is discussed.
Book Synopsis Design of Flexible Pavements Based on Relationships of Performance, Materials Properties, and Surface Deflections Using Results of the AASHO Road Test, Measurements on Minnesota Pavement Sections, and Elastic Theory by : Eugene Louis Skok
Download or read book Design of Flexible Pavements Based on Relationships of Performance, Materials Properties, and Surface Deflections Using Results of the AASHO Road Test, Measurements on Minnesota Pavement Sections, and Elastic Theory written by Eugene Louis Skok and published by . This book was released on 1969 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Statewide Flexible Pavement Performance and Deflection Study by :
Download or read book Statewide Flexible Pavement Performance and Deflection Study written by and published by . This book was released on 1968 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanistic Design Concepts for Conventional Flexible Pavements by : R. P. Elliott
Download or read book Mechanistic Design Concepts for Conventional Flexible Pavements written by R. P. Elliott and published by . This book was released on 1985 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanistic design concepts for conventional flexible pavement (asphalt concrete (AC) surface + granular base/subbase) for highways are proposed and validated. The procedure is based on ILLI-PAVE, a stress dependent finite element computer program, coupled with appropriate transfer functions. Two design criteria are considered: AC flexural fatigue cracking and subgrade rutting. Fatigue cracking is controlled by limiting the tensile strain at the bottom of the AC layer. Subgrade rutting is controlled by limiting the stress-ratio at the granular layer-subgrade interface. Algorithms were developed relating pavement response parameters (stresses, strains, deflections) to AC thickness, AC moduli, granular layer thickness, and subgrade moduli. Extensive analyses of the AASHO Road Test flexible pavement data are presented supporting the validity of the proposed concepts.
