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Abstract

This paper investigates the characteristics of temperature gradients in a high-performance concrete (HPC) box girder with unconventional cross section under the solar radiation in Shanghai, China. The comparisons of thermal effects calculated according to the Chinese and foreign design code provisions show that the temperature gradient models of the current codes are not appropriate for the HPC box girder with unconventional cross section. In this paper, a new method is proposed to determine the solar temperature actions based on the stationary binomial probability model of random process. For the HPC box girder, the design standard value of equivalent linear temperature differences and cross-section temperature differences in the design reference period are obtained from the proposed method. Finally, the solar temperature gradients in the HPC box girder with unconventional cross section are gained based on the suggested design standard values.

Keywords

high-performance concrete box girder solar temperature field thermal effects temperature gradient

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On Temperature Gradients in High-Performance Concrete Box Girder under Solar Radiation

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