Theoretical Analysis of Extreme Temperatures and Thermal Stresses in Bridge Deck Pavements

Yan-Ping Sheng ； Qian Wang ； Hai-Bin Li

《International Journal of Pavement Research and Technology》 4卷4期 (2011/07) Pp. 238-243

https://doi.org/10.6135/ijprt.org.tw/2011.4(4).238

並列摘要

Thermal stresses at the extreme temperature conditions can cause various pavement distresses. These distresses may degrade the structural performance of bridge deck pavements (BDP), such as, upheaval, low-temperature cracking, reflective cracking, etc. It is essential to understand the influence of the extreme temperatures on the pavement distresses. Based on the analytical solutions of temperature in BDP, the simplified formulae for calculation of stresses for the extreme temperatures (maximum and minimum temperatures) in BDPs were developed in this study. The calculated results obtained from the developed simplified formulae were then compared with the data measured in the field. The differences between them were found to be within 2℃. In addition, this paper also analyzed the thermal stresses at the extreme temperatures in BDP. The sample bridge deck and asphalt concrete pavements were analyzed. The maximum principal and shear stresses in the BDP at the wide range of temperatures were calculated using 3D finite element method. The compared results showed a strong linear correlation between the BDP maximum principal stress and the elastic modulus. This linear relationship also existed between the shear stress and the elastic modulus. From the finite element analysis, it is found that the BDP elastic modulus affects the thermal stress more than the thickness of BDP. With the consideration of thermal stresses of BDP, the thickness of BDP from 6 to 12 cm is recommended for the BDP construction.

並列關鍵字

3D finite element method analysis ； Bridge deck pavement ； Extreme temperatures ； Thermal stress