Interlaminar thermal effect analysis of steel bridge deck pavement during gussasphalt mixture paving

ABSTRACT

In this research, the effect of high-temperature asphalt concrete paving on the interlaminar shear behaviour between the steel bridge deck pavement (SBDP) and the orthotropic steel bridge deck (OSBD) is the main objective. A thermal field model of steel box-girder was established based on the transient thermal field theory, and the element deletion method was used to simulate the dynamic paving process of gussasphalt mixture (GAM). The thermal field model was validated by the field monitoring data of Taizhou Yangtze River Highway Bridge in China, and the temperature variations in OSBD during the paving was summarised. Applying the most unfavourable temperature load during GAM paving to the steel box-girder mechanical model, the interlaminar shear stress distribution was calculated, and combined with the shear strength variation of waterproof bonding material during GAM paving, the interlaminar thermal effect of SBDP was evaluated. Results show that the thermal field of steel bridge presents temporal and spatial variation characteristic. The interlaminar shear stress during GAM paving in the low-temperature season is much larger than that in the high-temperature season, but the interlaminar thermal effect is more severe in the high-temperature construction season due to the more inferior shear performance of waterproof bonding material.

KEYWORDS:

• Steel bridge deck pavement
• interlaminar thermal effect
• transient thermal field theory
• composite solid element
• element deletion method
• inclined shear test

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [grant number 51378122], [grant number 51678146]; the Scientific Research Foundation of Graduate School of Southeast University [grant number YBJJ1680]; the China Scholarship Council program [grant number 201606090128].