ABSTRACT
Temperature stress caused by solar radiation on structure is nonuniform and may cause component damage or even destruction, which buries an unpredictable risk for bridge safety. On this basis, color of the bridges is an apparent factor that may cause different degrees of absorption to the sunlight. To understand more specific differences of temperature variation between steel painted different colors under sunlight, this paper studies the temperature variation of steel with different colors by means of experiments. Steel samples of standard size with various colors were placed horizontally and exposed to sunlight to measure temperature changes over the course of a day in various places. This research also discusses how the environmental parameters affect the temperature change of steel specimens. Based on the observation of the change of the temperature of steel specimens with different colors, it was observed that the direct sunlight had an obvious influence on the temperature on the steel specimens and the temperature variation between different colors was huge. The above findings may have reference value for the analysis of temperature effect of colored steel bridges in the same region.
