Study on solar thermal effects of main cables in long-span suspension bridges
摘要
The main cable serves as the principal load-bearing component of a large-span suspension bridge, and its efficacy dictates the bridge's load-bearing capacity. The impact of temperature variation on the primary cable is enduring and constitutes one of the elements that induces alterations in the linear configuration of the suspension bridge. This research presents a detailed model of the main cable of a suspension bridge for the analysis of its temperature field, utilizing heat transfer theory and accounting for the effects of wind speed. The temperature field simulation analysis of the main cable across various seasons is conducted using the secondary development of ABAQUS. The research findings confirm the model's reliability by comparing the measured temperature values at the cross-section measurement points within the span to the calculated temperature values. The temperature disparity between the measurement stations of the main cable increases when accounting for wind speed effects. In winter, the elevated temperature region on the main cable's surface is predominantly located in the upper-left section, whereas in summer, it shifts towards the upper-right section relative to other seasons. Consequently, it is essential to conduct critical monitoring of temperatures in these regions during various seasons.