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The Resource Direct calculation of maximum curvature and strain in AC layers of pavements from load deflection basin measurements
Direct calculation of maximum curvature and strain in AC layers of pavements from load deflection basin measurements
Resource Information
The item Direct calculation of maximum curvature and strain in AC layers of pavements from load deflection basin measurements represents a specific, individual, material embodiment of a distinct intellectual or artistic creation found in University of Oklahoma Libraries.This item is available to borrow from all library branches.
Resource Information
The item Direct calculation of maximum curvature and strain in AC layers of pavements from load deflection basin measurements represents a specific, individual, material embodiment of a distinct intellectual or artistic creation found in University of Oklahoma Libraries.
This item is available to borrow from all library branches.
 Language
 eng
 Extent
 27 p.
 Note
 "Deflection measurements under impulse load carried out with the falling weight deflectometer (FWD) are usually processed by using elastic layer analysis programs, backcalculating layer moduli from measured deflections, and then forwardcomputing critical performance parameters such as stresses and strains at locations under the load. In spite of the quality of the programs used, calculations are cumbersome and not always reliable. This report presents a more direct, and more reliable way of computing some of those parameters in the top layer, especially the important value of horizontal strain at the bottom of this layer. The measured deflections from an FWD test, the radius of load distribution and the thickness under the load are the only data needed to calculate the curvature and the strains in the top layer of a pavement structure. in the proposed method, the maximum curvature of the deflection basin under the load is calculated directly from measured FWD deflections and the radius of load distribution. The strains in the top layer are then determined by the given layer thickness near the load. Corresponding stresses can also be calculated, but additional information is needed, namely the elastic stiffness of the first layer, Poisson's ratio, and the loadinduced vertical stress."
 Label
 Direct calculation of maximum curvature and strain in AC layers of pavements from load deflection basin measurements
 Title
 Direct calculation of maximum curvature and strain in AC layers of pavements from load deflection basin measurements
 Language
 eng
 http://library.link/vocab/creatorName
 Jung, Friedrich W
 LC call number
 TE278 .J95 1989
 http://library.link/vocab/subjectName

 Deflection
 Deflectographs
 Falling weight deflectometers
 Pavements, Flexible
 Pavements
 Stresses
 Structural analysis
 Thickness
 Label
 Direct calculation of maximum curvature and strain in AC layers of pavements from load deflection basin measurements
 Note
 "Deflection measurements under impulse load carried out with the falling weight deflectometer (FWD) are usually processed by using elastic layer analysis programs, backcalculating layer moduli from measured deflections, and then forwardcomputing critical performance parameters such as stresses and strains at locations under the load. In spite of the quality of the programs used, calculations are cumbersome and not always reliable. This report presents a more direct, and more reliable way of computing some of those parameters in the top layer, especially the important value of horizontal strain at the bottom of this layer. The measured deflections from an FWD test, the radius of load distribution and the thickness under the load are the only data needed to calculate the curvature and the strains in the top layer of a pavement structure. in the proposed method, the maximum curvature of the deflection basin under the load is calculated directly from measured FWD deflections and the radius of load distribution. The strains in the top layer are then determined by the given layer thickness near the load. Corresponding stresses can also be calculated, but additional information is needed, namely the elastic stiffness of the first layer, Poisson's ratio, and the loadinduced vertical stress."
 Extent
 27 p.
 System control number
 (EOS.Web)10191
 Label
 Direct calculation of maximum curvature and strain in AC layers of pavements from load deflection basin measurements
 Note
 "Deflection measurements under impulse load carried out with the falling weight deflectometer (FWD) are usually processed by using elastic layer analysis programs, backcalculating layer moduli from measured deflections, and then forwardcomputing critical performance parameters such as stresses and strains at locations under the load. In spite of the quality of the programs used, calculations are cumbersome and not always reliable. This report presents a more direct, and more reliable way of computing some of those parameters in the top layer, especially the important value of horizontal strain at the bottom of this layer. The measured deflections from an FWD test, the radius of load distribution and the thickness under the load are the only data needed to calculate the curvature and the strains in the top layer of a pavement structure. in the proposed method, the maximum curvature of the deflection basin under the load is calculated directly from measured FWD deflections and the radius of load distribution. The strains in the top layer are then determined by the given layer thickness near the load. Corresponding stresses can also be calculated, but additional information is needed, namely the elastic stiffness of the first layer, Poisson's ratio, and the loadinduced vertical stress."
 Extent
 27 p.
 System control number
 (EOS.Web)10191
Library Locations

Architecture LibraryBorrow itGould Hall 830 Van Vleet Oval Rm. 105, Norman, OK, 73019, US35.205706 97.445050



Chinese Literature Translation ArchiveBorrow it401 W. Brooks St., RM 414, Norman, OK, 73019, US35.207487 97.447906

Engineering LibraryBorrow itFelgar Hall 865 Asp Avenue, Rm. 222, Norman, OK, 73019, US35.205706 97.445050

Fine Arts LibraryBorrow itCatlett Music Center 500 West Boyd Street, Rm. 20, Norman, OK, 73019, US35.210371 97.448244

Harry W. Bass Business History CollectionBorrow it401 W. Brooks St., Rm. 521NW, Norman, OK, 73019, US35.207487 97.447906

History of Science CollectionsBorrow it401 W. Brooks St., Rm. 521NW, Norman, OK, 73019, US35.207487 97.447906

John and Mary Nichols Rare Books and Special CollectionsBorrow it401 W. Brooks St., Rm. 509NW, Norman, OK, 73019, US35.207487 97.447906


Price College Digital LibraryBorrow itAdams Hall 102 307 West Brooks St., Norman, OK, 73019, US35.210371 97.448244

Western History CollectionsBorrow itMonnet Hall 630 Parrington Oval, Rm. 300, Norman, OK, 73019, US35.209584 97.445414
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