Study on Thermal Stresses in Continuously Reinforced Concrete Pavement

1998 ◽  
Vol 1629 (1) ◽  
pp. 99-107 ◽  
Author(s):  
Tatsuo Nishizawa ◽  
Shigeru Shimeno ◽  
Akinori Komatsubara ◽  
Masashi Koyanagawa
Keyword(s):  
Thermal Stress ◽  
Reinforced Concrete ◽  
Structural Design ◽  
Thermal Stresses ◽  
Concrete Pavement ◽  
Concrete Slabs ◽  
Transverse Stress ◽  
Nonlinear Component ◽  
Nonlinear Components

In the structural design of continuously reinforced concrete pavement (CRCP), thermal stresses should be properly taken into account. Thermal strains and temperatures in concrete slabs were measured on test sections of CRCP. Measured strains were divided into axial, curling, and nonlinear components, and each component was examined. It was found that the curling component is predominant in terms of transverse stress, which is important in the structural design. However, the maximum thermal stress is reduced by 25 percent because of the nonlinear component. On the basis of the results, a procedure for estimating the thermal stress in CRCP was proposed.

scholarly journals Discussion: Thermal stresses in reinforced concrete slabs

1964 ◽  
Vol 16 (48) ◽  
pp. 167-168
Author(s):  
D. J. Hannant ◽  
P. S. Pell ◽  
O. O. Ogunlesi
Keyword(s):  
Reinforced Concrete ◽  
Thermal Stresses ◽  
Concrete Slabs ◽  
Reinforced Concrete Slabs

scholarly journals Study on Thermal Stresses in Continuously Reinforced Concrete Pavement.

1997 ◽  
pp. 123-132
Author(s):  
Tatsuo Nishizawa ◽  
Shigeru Shimeno ◽  
Akinori Komatsubara ◽  
Masashi Koyanagawa
Keyword(s):  
Reinforced Concrete ◽  
Thermal Stresses ◽  
Concrete Pavement

Temperature Gradient of Concrete Pavement Slab Overlaid with Asphalt Surface Course

2000 ◽  
Vol 1730 (1) ◽  
pp. 25-33 ◽  
Author(s):  
Tatsuo Nishizawa ◽  
Shigeru Shimeno ◽  
Akinori Komatsubara ◽  
Masashi Koyanagawa
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Thermal Stress ◽  
Temperature Gradient ◽  
Numerical Simulations ◽  
Structural Design ◽  
Concrete Slab ◽  
Concrete Pavement ◽  
Reduction Effect ◽  
The Relationship

In the structural design of composite pavement with a concrete pavement slab overlaid with an asphalt surface course, it is very important to estimate the temperature gradient in the concrete slab. An asphalt surface course reduces the temperature gradient in an underlaid concrete slab, resulting in the reduction of thermal stress of the concrete slab. This effect was investigated by temperature measurement in model pavements and by thermal conductivity analysis. Thermal properties were estimated by a backanalysis by using measured temperatures over 1 year. From the numerical simulations varying the thickness of asphalt surface and concrete slab, the relationship between the reduction effect and the asphalt thickness was derived as a function of the thickness of asphalt surface course, which can be used in the structural design of the composite pavement.

Thermal Stress Calculation Method for Concrete Pavement Based on Temperature Prediction and Finite Element Method Analysis

2017 ◽  
Vol 2640 (1) ◽  
pp. 104-114
Author(s):  
Tatsuo Nishizawa ◽  
Masashi Koyanagawa ◽  
Yasusi Takeuchi ◽  
Kazuyuki Kubo ◽  
Toru Yoshimoto
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Thermal Stress ◽  
Thermal Stresses ◽  
Concrete Slab ◽  
Control Volume ◽  
Concrete Pavement ◽  
Peak Time ◽  
Stress Equation ◽  
Element Method

A method to predict thermal stress of a concrete slab was developed in this study. In this method, temperatures and thermal stresses in a concrete slab are predicted by solving a one-dimensional heat transfer equation with the control volume method and three-dimensional finite element method (3DFEM). Predicted temperatures were compared with those measured in various regions in Japan to validate the method. The thermal strains calculated with 3DFEM were also compared with those measured in test concrete pavement slabs to confirm the method’s validity. The relative frequencies of thermal stress for one year were obtained from the calculated stresses. In thin slabs (20 and 23 cm), tensile thermal stress at the bottom was greater than those estimated with the current thermal stress equation, which considers internal stress due to the nonlinearity of the temperature profile in the slab. In thick slabs (25 and 30 cm), by contrast, the current thermal stress equation gave almost the same thermal stress as the finite element method did, although the peak time for the maximum tensile stress was delayed in the thick slabs. The proposed method can be applied to a variety of concrete pavement structures under various temperature conditions.

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