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Author : Albert Jasper Bush
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (117 download)
Download or read book Pavement Evaluation Using Deflection Basin Measurements and Layered Theory written by Albert Jasper Bush and published by . This book was released on 1985* with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Waheed Uddin
Publisher :
ISBN 13 :
Total Pages : 404 pages
Book Rating : 4.3/5 (555 download)
Download or read book A Structural Evaluation Methodology for Pavements Based on Dynamic Deflections written by Waheed Uddin and published by . This book was released on 1985 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ranjithan, SR.
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (125 download)
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.
Author : R. Clark Graves
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (1 download)
Download or read book Pavement Deflection Evaluations written by R. Clark Graves and published by . This book was released on 1992 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study a procedure has been developed to evaluate the structural condition of pavements using Road Rater deflection measurements. These procedures compare actual field deflections with deflections calculated by the Chevron N-Layer linear elastic computer program. The results obtained from these procedures are the layer moduli of the pavement materials. Procedures have been developed for asphaltic concrete pavements and composite pavements, including broken and non-broken concrete layers. This report also contains a comparison of structural overlay determined using the results of the new procedure, with overlays calculated using results from the 2-3 Projected procedure currently used by the Pavement Management branch of the Kentucky Transportation Cabinet. A users manual from the computer programs developed during this study is included in the appendix of the report.
Author : MS. Mamlouk
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (125 download)
Download or read book Evaluation of In-Situ Pavement Moduli from Deflection Measurements written by MS. Mamlouk and published by . This book was released on 1985 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: At present, there is no direct solution that provides the pavement in-situ layer moduli from deflection measurements. Current methods evaluate the pavement layer moduli from deflection measurements using either empirical approaches or layered elastic computer programs with iterative solutions. In this study mechanistically based typical curves are developed to evaluate the moduli of the pavement layers: surface, base, subbase, and subgrade from surface deflection measurements. The curves are developed using the Chevron N-layer computer program with a large number of typical combinations of layer thicknesses and material moduli. The load is assumed to be uniformly applied on a single circular plate with a 304.8-mm (12-in.) diameter, a typical condition of the falling weight deflectometer and the road rater with a single circular plate. Twenty-four sets of curves are developed representing a wide range of layer thicknesses and deflection basin shapes. Therefore, if the layer thicknesses are known and the surface deflection measurements are determined, the four moduli of the pavement layers can be evaluated. The developed curves are simple to use without the need for previous empirical relationships or computer analysis. The curves developed here are based on static analysis.
Author : Albert Jasper Bush
Publisher : ASTM International
ISBN 13 : 0803112602
Total Pages : 701 pages
Book Rating : 4.8/5 (31 download)
Download or read book Nondestructive Testing of Pavements and Backcalculation of Moduli written by Albert Jasper Bush and published by ASTM International. This book was released on 1989 with total page 701 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert L. Lytton
Publisher :
ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.3/5 (121 download)
Download or read book Pavement Evaluation written by Robert L. Lytton and published by . This book was released on 1975 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 176 pages
Book Rating : 4.:/5 (1 download)
Download or read book Evaluation of Pavement Deflection Measuring Equipment written by and published by . This book was released on 1987 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the research performed on evaluation of pavement deflection equipment under Contract DTFH61-85-C-00115 for the Federal Highway Administration. The following devices were included in side-by-side field tests conducted in the Austin, Texas area during the week of August 11, 1986: the Benkelman Beam, C.E.B.T.P. Curviameter, Dynaflect, Dynatest Falling Weight Deflectometer (FWD), Kuab FWD, Phonix FWD, and the Road Rater. The report includes descriptions and comparisons of the devices through information obtained from a literature search, field tests and user survey conducted for this study. The side-by-side test program was performed over a broad range of pavement structures, including thick and thin flexible and rigid pavements, and composite pavements. The measured deflections were compared statistically. Mechanistic interpretations of the measured deflection basins were made and compared.
Author : ASTM Committee D-18 on Soil and Rock. Subcommittee D-4 on Road and Paving Materials
Publisher : ASTM International
ISBN 13 : 0803118651
Total Pages : 528 pages
Book Rating : 4.8/5 (31 download)
Download or read book Nondestructive Testing of Pavements and Backcalculation of Moduli written by ASTM Committee D-18 on Soil and Rock. Subcommittee D-4 on Road and Paving Materials and published by ASTM International. This book was released on 1994 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of June 1993 international symposium held in Atlanta, Georgia, called specifically to develop and standardized evaluation procedures for non-destructive methods of testing pavements. The 29 papers discuss analytical models and techniques, measurement and calculation techniques in the field and laboratory, problems and errors associated with backcalculation methods and design parameters, and testing for other pavement uses. Also includes a history of the quest for a standard and the status of that effort. Reproduced from typescripts. Annotation copyright by Book News, Inc., Portland, OR
Author : Waheed Uddin
Publisher :
ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.3/5 (555 download)
Download or read book A User's Guide for Pavement Evaluation written by Waheed Uddin and published by . This book was released on 1985 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mario S. Hoffman
Publisher :
ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.:/5 (31 download)
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:
Author : Mary Stroup-Gardiner
Publisher : ASTM International
ISBN 13 : 0803134614
Total Pages : 274 pages
Book Rating : 4.8/5 (31 download)
Download or read book Resilient Modulus Testing for Pavement Components written by Mary Stroup-Gardiner and published by ASTM International. This book was released on 2003 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Resilient modulus indicates the stiffness of a soil under controlled confinement conditions and repeated loading. The test is intended to simulate the stress conditions that occur in the base and subgrade of a pavement system. Resilient modulus has been adopted by the U.S. federal highway administration as the primary performance parameter for pavement design. We thank those who prepared these papers, the reviewers who provided anonymous peer reviews, and those who participated in the symposium. We hope this STP encourages more work to improve the testing standard and the value of the Resilient Modulus test."
Author : T.F. Fwa
Publisher : CRC Press
ISBN 13 : 1420039504
Total Pages : 886 pages
Book Rating : 4.4/5 (2 download)
Download or read book The Handbook of Highway Engineering written by T.F. Fwa and published by CRC Press. This book was released on 2005-09-28 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern highway engineering reflects an integrated view of a road system's entire lifecycle, including any potential environmental impacts, and seeks to develop a sustainable infrastructure through careful planning and active management. This trend is not limited to developed nations, but is recognized across the globe. Edited by renowned authority
Author : American Association of State Highway and Transportation Officials
Publisher : AASHTO
ISBN 13 : 1560510552
Total Pages : 622 pages
Book Rating : 4.5/5 (65 download)
Download or read book AASHTO Guide for Design of Pavement Structures, 1993 written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 1993 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design related project level pavement management - Economic evaluation of alternative pavement design strategies - Reliability / - Pavement design procedures for new construction or reconstruction : Design requirements - Highway pavement structural design - Low-volume road design / - Pavement design procedures for rehabilitation of existing pavements : Rehabilitation concepts - Guides for field data collection - Rehabilitation methods other than overlay - Rehabilitation methods with overlays / - Mechanistic-empirical design procedures.
Author : National Research Council (U.S.). Transportation Research Board
Publisher : Transportation Research Board National Research
ISBN 13 :
Total Pages : 516 pages
Book Rating : 4.:/5 (1 download)
Download or read book Pavement Response, Evaluation, and Data Collection written by National Research Council (U.S.). Transportation Research Board and published by Transportation Research Board National Research. This book was released on 1986 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Erland O. Lukanen
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.3/5 (91 download)
Download or read book Evaluation of the Model 2000 Road Rater. Final Report written by Erland O. Lukanen and published by . This book was released on 1981 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gary W. Sharpe
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.:/5 (524 download)
Download or read book Pavement Evaluation Using Road Rater Deflections written by Gary W. Sharpe and published by . This book was released on 1978 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic test deflections have been duplicated by elastic theory using the Chevron N-layered computer program. Dynamic surface deflections obtained using the Road Rater have been used in conjunction with elastic theory to analyze pavement behavior. A procedure has been developed to use field measured Road Rater deflections to estimate the elastic moduli of the foundation material and to determine the equivalent thicknesses of new material which approximate the behavior of the structure. The estimated moduli and (or ) equivalent thicknesses may be used as inputs to design overlay thicknesses. An analysis of the deflection of the first three sensors of the Road rater also makes it possible to distinguish weaknesses in asphaltic concrete layers from weaknesses in the supporting foundation.
