00739775

Component

https://doi.org/10.3141/1568-08

http://scholar.google.com...nsen&publication_year=1997

Temperature and moisture gradients can lead to significant tensile stresses at the slab top and bottom. Current techniques for assessing the internal stresses due to such gradients are based on the assumption that temperature and moisture distributions through the slab thickness are linear. However, the actual distributions of such gradients have been found to be highly nonlinear. A new closed form solution technique for calculating the stresses in a pavement slab due to nonlinear gradients is introduced. The analysis is separated into two parts. In the first, an expression is presented for calculating the self-equilibrated stresses within a cross section due to internal restraint (i.e., satisfying equilibrium conditions and continuity of the strain field within the cross section). These stresses are independent of slab dimensions and boundary conditions. In the second, the stresses due to external restraint (i.e., self-weight and subgrade reaction) are calculated using an equivalent linear temperature gradient obtained from the first part and existing closed form solutions by Westergaard or Bradbury. The solution to this step includes slab length and boundary conditions. Total internal stresses due to nonlinear gradients are obtained by using the superposition principle. The methodology has been applied to field data from two studies in which the temperature profiles were recorded throughout a 24-hr period. Linear gradient solution methods cannot accurately predict the curling stresses in concrete pavements. This is especially pronounced during nighttime and early morning hours, during which nonlinear analysis predicts tensile stress in both the slab bottom and top before the application of any traffic loading.

This paper appears in Transportation Research Record No. 1568, Pavement Rehabilitation and Design.

English

p. 65-71

1997

Transportation Research Record

0309059747

Figures (15) ; References (8) ; Tables (1)

Boundary value problems; Concrete; Concrete pavements; Curling; Internal forces; Mathematical models; Nonlinear systems; Slabs; Stresses; Temperature gradients; Tension

Boundary conditions; Internal stresses; Nonlinearity; Tensile stress

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

TRIS, TRB, ATRI

Aug 25 1997 12:00AM

• COMPATIBLE APPROACH TO CONCRETE STRENGTH CHARACTERIZATION IN THE DESIGN AND CONSTRUCTION OF CONCRETE PAVEMENTS
• DETECTING STRIPPING IN ASPHALT CONCRETE LAYERS USING GROUND PENETRATING RADAR
• DEVELOPMENT OF A ROLLER-COMPACTED CONCRETE PAVEMENT CRACK AND JOINT SPACING MODEL
• EARLY AGE PERFORMANCE OF CONTINUOUSLY REINFORCED CONCRETE PAVEMENT WITH DIFFERENT TYPES OF AGGREGATE
• ELASTIC PAVEMENT ANALYSIS USING INFINITE ELEMENTS
• FINITE-ELEMENT ANALYSIS OF PORTLAND CEMENT CONCRETE PAVEMENTS WITH CRACKS
• FLEXIBLE PAVEMENT OVERLAYS: THE STATE EXPERIENCE
• FRACTURE MECHANICS IN PAVEMENT ENGINEERING: THE SPECIMEN-SIZE EFFECT
• IMPLEMENTATION FEASIBILITY OF ASPHALT CONCRETE-OVERLAID PORTLAND CEMENT CONCRETE PAVEMENT REHABILITATION GUIDELINES
• IMPROVED METHODOLOGY FOR DEVELOPING A LONG-RANGE PAVEMENT REHABILITATION PROGRAM
• IN SITU EVALUATION OF FATIGUE DAMAGE GROWTH AND HEALING OF ASPHALT CONCRETE PAVEMENTS USING STRESS WAVE METHOD
• INNOVATIVE APPROACH TO FATIGUE CRACK PROPAGATION IN CONCRETE PAVEMENTS
• LABORATORY AND FIELD MOISTURE CONDITIONS FOR FLEXIBLE PAVEMENT
• MODIFIED PORTLAND CEMENT ASSOCIATION STRESS ANALYSIS AND THICKNESS DESIGN PROCEDURES
• NEURAL NETWORK ALGORITHMS FOR THE CORRECTION OF CONCRETE SLAB STRESSES FROM LINEAR ELASTIC LAYERED PROGRAMS
• PERFORMANCE OF A REHABILITATED D-CRACKED JOINTED PLAIN CONCRETE AIRFIELD PAVEMENT
• RELIABILITY DESIGN OF FLEXIBLE AIRFIELD PAVEMENTS: ELASTIC LAYERED METHOD
• SIMPLIFIED PROCEDURE FOR PREDICTION OF ASPHALT PAVEMENT SUBSURFACE TEMPERATURES BASED ON HEAT TRANSFER THEORIES
• STRUCTURAL EVALUATION AND ANALYSIS OF INSTRUMENTED IN-SERVICE CONCRETE PAVEMENTS SUBJECTED TO HEAVY DYNAMIC LOADS
• TECHNIQUES FOR SELECTING PAVEMENT REHABILITATION STRATEGIES: PENNSYLVANIA CASE STUDIES