00206203

Component

http://onlinepubs.trb.org...ubs/hrr/1963/42/42-004.pdf

EXISTING RIGID PAVEMENT DESIGN EQUATIONS SPRING PRIMARILY FROM THE THEORIES DEVELOPED BY WESTERGAARD IN 1925. SOME OF THESE DESIGN EQUATIONS ARE BASED ON EMPIRICAL MODIFICATIONS OF THE ORIGINAL THEORY, OTHERS ARE MERELY SIMPLIFICATIONS. SEVERAL OF THE EMPIRICAL MODIFICATIONS HAVE BEEN DEVELOPED FROM STRAIN MEASUREMENTS TAKEN UNDER STATIC LOADS. RECENT DEVELOPMENTS IN ELECTRONIC EQUIPMENT ALLOW MORE ACCURATE DYNAMIC STRAIN MEASUREMENT THAN WAS FORMERLY POSSIBLE. SUCH EQUIPMENT WAS USED TO MAKE APPROXIMATELY 100,000 INDIVIDUAL STRAIN GAGE READINGS UNDER DYNAMIC LOADS IN CONJUNCTION WITH THE AASHO ROAD TEST /1958 TO 1966/ THE PURPOSE OF THIS PAPER IS TO DISCUSS THESE STRAIN MEASUREMENTS AND TO COMPARE THEM WITH THE STATIC STRAIN MEASUREMENTS USED TO DEVELOP EXISTING EMPIRICAL DESIGN EQUATIONS. THE STRESSES CALCULATED FROM THESE STRAINS WILL BE COMPARED WITH THE ORIGINAL WESTERGAARD THEORIES. SUCH COMPARISONS COULD PROVIDE THE BASIS FOR MODIFYING EMPIRICAL DESIGN EQUATIONS TO INCLUDE A DYNAMIC LOAD EFFECT. /AUTHOR/

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01410010

pp 57-98

1963

Highway Research Record

Digital/other

Appendices (3) ; Figures (29) ; Photos (1) ; References (13) ; Tables (15)

Alternatives analysis; Concrete pavements; Dynamic loads; Electronic equipment; Equations; Loads; Pavement design; Statics; Strain gages; Strain measurement; Stresses; Theory

AASHO Road Test

Highways; Pavements

TRIS, TRB

Feb 20 1994 12:00AM

• APPLICATIONS OF A GENERAL CURVE FITTING PROCEDURE TO AASHO ROAD TEST DATA
• NATIONWIDE SURVEY OF PAVEMENT TERMINAL SERVICEABILITY
• USE OF LOADOMETER DATA IN DESIGNING PAVEMENTS FOR MIXED TRAFFIC