Study on Thermal Stresses in Continuously Reinforced Concrete Pavement

Nishizawa, Tsutomu; Shimeno, Shigeru; Komatsubara, Akinori; Koyanagawa, Masashi

doi:10.2208/jscej.1997.578_123

Cited by 1 publication

(3 citation statements)

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“…Therefore, the total thermal stress is quite different from the curling stress. This difference has been stated by many researchers (3)(4)(5)(6)(7)(8). In Japan, Iwama (1) investigated the thermal stress on fullscale test pavements and suggested that the actual thermal stress should be estimated by reducing 30% from Westergaard's (2) equation.…”

Section: Thermal Stress Estimated From Experimental Resultsmentioning

confidence: 99%

“…In this study, a quadratic approximation is used to express strain or temperature distribution throughout slab depths (3)(4)(5):…”

Section: Calculating Thermal Stress On the Basis Of Measuring Resultsmentioning

confidence: 99%

“…stresses at the bottom of the slabs at each central measuring point (1)(2)(3)(4)(5)(6) in Unit C and 2-6 in Unit D) on August 15, 2007. The linear component of thermal stress (curling stress) varies corresponding to the variation of temperature difference, while the nonlinear component (internal stress) varies opposite the variation in temperature difference. Therefore, the total thermal stress is quite different from the curling stress.…”

Section: Thermal Stress Estimated From Experimental Resultsmentioning

confidence: 99%

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Finite Element Model Analysis of Thermal Stresses of Thick Airport Concrete Pavement Slabs

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Transportation Research Record: Journal of the Transportation R

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Thermal stress caused by temperature distribution in pavement slab is important in the structural design of airport concrete pavements. Airport concrete pavement slab is thick; therefore, temperature in the slab varies nonlinearly throughout its depth. Thermal stress caused by nonlinear temperature distribution differs from that of linear temperature distribution. In this study, thermal stress caused by nonlinear temperature distribution was calculated by using temperatures and restraint strains measured in an experimental concrete pavement with 460-mm-thick slabs. The calculated thermal stress differed from curling stress because of the linear temperature distribution. Temperature distributions in concrete slabs of various thicknesses were computed by solving the heat transfer equation with the control volume method. This calculation revealed that temperature distributions in thick concrete slabs were highly nonlinear. Thermal stress was analyzed to compute the nonlinear thermal stress distributions in concrete slabs from the computed temperature distributions by using a three-dimensional finite element model. On the basis of the analysis, effects of slab thickness and nonlinear temperature distribution on thermal stress were discussed. The effect of nonlinearity was found to be pronounced at a slab thickness greater than 300 mm. In this range, the reduction factor for taking into account the effect of nonlinear distribution was larger than 0.7. It was also found that thermal stresses in summer and spring were relatively large.

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