The Effect of the Dowel Bar Shape and Spacing in Portland Cement Concrete Pavements on the Load Transfer Efficiency of the Transverse Joint PDF Download
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Author: Dominique Nicole Jean Ingram
Publisher:
ISBN:
Category :
Languages : en
Pages : 254
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Book Description
This paper investigates the effect of dowel bar shape and spacing on the Load Transfer Efficiency of transverse joints in Portland Cement Concrete Pavements. Three different dowel bar sizes, were utilized for this research: a 1.5-inch round dowel bar, an elliptical dowel bar with axes 1.98 and 1.33 inches, and a second elliptical dowel bar with axes of 1.66 and 1.13 inches. Three spacings were investigated with the dowel bar shape, which included 12 inches, 15 inches and 18 inches. The research was accomplished by comparing finite element analyses of the nine shape and spacing combinations with the data collected from construction along Ia. 330. A portion of the highway was constructed using steel dowels of the three sizes described above. Deflection data was collected by the Iowa Department of Transportation using a Falling Weight Deflectometer. Also integrated into the study is the effect the dowel bar shape and spacing has on the reactions imposed on the embedded dowel bars from the applied loads on the pavement surface. A macro was developed using finite element analysis to record the deflected shape, bending moments, shear force, stresses and elastic strains experienced by the dowel bar. Theoretical developments by S. Timoshenko, B. Friberg, and Tabatabaie were also included in this research for comparisons with the finite element analyses.
Author: Dominique Nicole Jean Ingram
Publisher:
ISBN:
Category :
Languages : en
Pages : 254
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Book Description
This paper investigates the effect of dowel bar shape and spacing on the Load Transfer Efficiency of transverse joints in Portland Cement Concrete Pavements. Three different dowel bar sizes, were utilized for this research: a 1.5-inch round dowel bar, an elliptical dowel bar with axes 1.98 and 1.33 inches, and a second elliptical dowel bar with axes of 1.66 and 1.13 inches. Three spacings were investigated with the dowel bar shape, which included 12 inches, 15 inches and 18 inches. The research was accomplished by comparing finite element analyses of the nine shape and spacing combinations with the data collected from construction along Ia. 330. A portion of the highway was constructed using steel dowels of the three sizes described above. Deflection data was collected by the Iowa Department of Transportation using a Falling Weight Deflectometer. Also integrated into the study is the effect the dowel bar shape and spacing has on the reactions imposed on the embedded dowel bars from the applied loads on the pavement surface. A macro was developed using finite element analysis to record the deflected shape, bending moments, shear force, stresses and elastic strains experienced by the dowel bar. Theoretical developments by S. Timoshenko, B. Friberg, and Tabatabaie were also included in this research for comparisons with the finite element analyses.
Author: Dr. Ashad Ullah Qureshi
Publisher: Concepts Books Publication
ISBN:
Category : Education
Languages : en
Pages : 26
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Book Description
Author: Geoffrey Griffiths
Publisher: CRC Press
ISBN: 0203962060
Category : Technology & Engineering
Languages : en
Pages : 193
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Book Description
This comprehensive design guide summarizes current developments in the design of concrete pavements. Following an overview of the theory involved, the authors detail optimum design techniques and best practice, with a focus on highway and infrastructure projects. Worked examples and calculations are provided to describe standard design methods, illustrated with numerous case studies. The author provides guidance on how to use each method on particular projects, with reference to UK, European and US standards and codes of practice. Concrete Pavement Design Guidance Notes is an essential handbook for civil engineers, consultants and contractors involved in the design and construction of concrete pavements, and will also be of interest to students of pavement design.
Author: American Association of State Highway and Transportation Officials
Publisher: AASHTO
ISBN: 1560510552
Category : Pavements
Languages : en
Pages : 622
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Book Description
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: Shad M. Sargand
Publisher:
ISBN:
Category : Nondestructive testing
Languages : en
Pages : 112
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Book Description
A jointed concrete pavement on I-490 near Rochester, NY, was reconstructed using three different dowel bar spacings in eastbound test sections. Two sections in the westbound direction were instrumented to monitor environmental strain, deflections, and pavement temperatures. Monitoring of the westbound sections was conducted at the time of construction, after 28 days of curing, and at various intervals over the next two years. The instrumentation included deep and shallow linear variable differential transducers (LVDTs) to measure displacements in the center and the corners of the slabs, thermocouples at four depths near the center and at one corner of the slab, and vibrating wire strain gages with built-in thermistors in the center and the left wheel path. Air temperature data were also gathered during monitoring periods. Data were taken from the instruments at the time of construction, and at 37 days (after curing), 12 months, 16 months, and 28 months after construction. In addition to instrumentation readings taken over an approximately 24-hour period, each visit included slab shape measurements made with a Dipstick®, and deflections measured with a falling weight deflectometer (FWD) on the westbound sections. The final data collection visit, in October 2004, also included FWD testing and profilometer measurements on the eastbound sections. In measuring the pavement response, the FWD and LVDT data both indicated some loss of support that varied in response to changing temperature conditions. Of the three dowel bar arrangements, the E2 arrangement that used bars with the smallest cross-section and the narrowest spacing had the best load transfer efficiency.
Author: Raymond K. Moore
Publisher:
ISBN:
Category : Dowels
Languages : en
Pages : 112
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Book Description
The report discusses the evolutionary developments in mechanistic dowel behaviour theory proposed by Bradbury, Grinter, Friberg, Lessels, Timoshenko, and Westergaard. New findings relating to dowel bar behaviour obtained from finite-element modelling are discussed. A sampling of pavement performance model which use empirical or empirical-mechanistic statistical regressions to estimate load transfer performance (expressed as transverse joint faulting) in terms of material, environmental and traffic variables not considered by theoretical analysis is presented. The findings from a limited number of field performance and laboratory studies are summarised.
Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 778
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Book Description
Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 704
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Book Description
Author: E. J. Yoder
Publisher: John Wiley & Sons
ISBN: 9780471977803
Category : Technology & Engineering
Languages : en
Pages : 732
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Book Description
Presents a complete coverage of all aspects of the theory and practice of pavement design including the latest concepts.
Author: Irene K. Battaglia
Publisher:
ISBN:
Category : Dowels
Languages : en
Pages : 52
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Book Description
