Study on Thermal Stress Due to Daily Temperature Change of Airport Concrete Pavement

Tsubokawa, Yukitomo; Mizukami, Junichi; Hachiya, Yoshitaka; Kameta, Shoichi

doi:10.2208/journalpe.12.157

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…The time of the maximum calculated stress is delayed by about 2 h compared with that of Iwama's stress. This delay was reported in the thick slabs of airport pavements (13).…”

Section: Comparisons Of Calculated and Measured Restraint Strainsmentioning

confidence: 53%

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

Nishizawa

Koyanagawa

Takeuchi

et al. 2017

Transportation Research Record: Journal of the Transportation R

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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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“…The time of the maximum calculated stress is delayed by about 2 h compared with that of Iwama's stress. This delay was reported in the thick slabs of airport pavements (13).…”

Section: Comparisons Of Calculated and Measured Restraint Strainsmentioning

confidence: 53%

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

Nishizawa

Koyanagawa

Takeuchi

et al. 2017

Transportation Research Record: Journal of the Transportation R

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“…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. Tsubokawa et al (9) proposed a similar thermal stress equation for thick concrete slab based on strain and temperature measurements in 420-mm-thick concrete slab. This concept is applicable in Unit C, where the maximum total tensile stress is smaller than the maximum curling stress.…”

Section: Thermal Stress Estimated From Experimental Resultsmentioning

confidence: 99%

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

Nishizawa

Ozeki

Katoh

et al. 2009

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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Study on Thermal Stress Due to Daily Temperature Change of Airport Concrete Pavement

Cited by 2 publications

References 2 publications

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

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

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

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