Thermal Stress Analysis on Steel Bridge Deck with Epoxy Asphalt Concrete under Low Temperature Based on Viscous-Elastic Method

Abstract:

Epoxy asphalt concrete has been widely used in China as an excellent paving material on long-span steel bridges. Analysis of its low-temperature thermal stress can be a more accurate grasp of pavement low temperature stress condition. The bending creep test of epoxy asphalt mixture was carried out at low temperatures to obtain the creep compliances and determine the relaxation module. Then the principal curves of the relaxation module were regressed in a form of Prony progression expression by Matlab. The relaxation module was further converted to the parameters needed in the viscous-elastic module in ANSYS software. Finally, a three-dimensional full-scale Finite Element model for steel box girder and asphalt overlay was constructed to analyze the stress scenario under low temperatures for the duration of 48 hours. The maximum temperature stress was only 2.45 MPa at a temperature of -20.4°C and thus no shrinkage cracks will occur.

• Periodical: Advanced Materials Research (Volume 598)
• Pages: 504-510
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.598.504
• Online since: November 2012
• Authors: Huan Yun Zhou, Yang Liu
• Keywords: Epoxy Asphalt, Finite Element, Relaxation Modulus, Thermal Stress, Viscous-Elastic

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