港口航道与近海工程2025，Vol.62Issue(1)：45-50,69,7.DOI:10.16403/j.cnki.ggjs20250109
钢管桁式拱考虑日照辐射温度及拱肋合拢时机研究
Research on the uneven temperature field and arch rib closing timing of steel tube truss arch considering shadow shielding
摘要
Abstract
In order to accurately analyze the uneven temperature field of long-span steel tube truss arch ribs under solar radiation and its impact on the closing timing,based on the transient thermal analysis theory and combined with light projection technology and blanking algorithm,a numerical model for calculating the uneven temperature field of arch ribs considering the effects of solar radiation and shadow shielding is established.The time-varying laws of the longitudinal and transverse temperatures of the arch ribs are analyzed,the uneven temperature coefficients of the arch ribs are calculated on the summer and winter solstice,and the temperature effects of the arch ribs when closed at different times are comparatively analyzed.This research shows that there is obvious spatiotemporal nonlinearity in the temperature within the truss arch ribs under solar radiation,and the maximum longitudinal and transverse temperature differences can reach 10.6°C and 32.1°C respectively;However,shadow shielding can reduce the maximum temperature of the lower chord of the arch ribs by 18%;Under the action of uneven positive and negative temperature differences,the arch rib deflection increased by 148 mm and-78 mm respectively compared with the uniform temperature difference,and the stress extreme values increased by 155%and 110%respectively.关键词
钢管桁式拱/日照辐射/不均匀温度/阴影遮挡/合拢时机Key words
steel tube truss arch/solar radiation/uneven temperature/shadow shielding/closing timing分类
交通运输引用本文复制引用
刘建武,石晓建,唐子越,严仁章..钢管桁式拱考虑日照辐射温度及拱肋合拢时机研究[J].港口航道与近海工程,2025,62(1):45-50,69,7.基金项目
重庆市教委科学技术研究项目(KJQN202403002) （KJQN202403002）
