PE钢拉索在某建筑工程项目长期服役后材料性能研究

Study on material properties of PE steel cable after long-term service in a building engineering project

原北京工人体育场在2006年进行了改建,在原钢结构雨篷上增加了由梭形桁架和拉索组成的斜拉结构。2020年该体育场启动保护性改造复建,对预应力梭形灯架进行拆除,并对预应力灯架长期服役使用13年后钢拉索的材料性能进行了试验研究,结果发现除了外层PE保护层出现老化,其他性能基本达到相关标准的要求。

The former Beijing Workers'Stadium was reconstructed in 2006 and a cable-stayed structure consisting of shuttle trusses and cables was added to the former steel canopy.In 2020,the stadium will start protective reconstruction and demolition of the prestressed shuttle lamp frame.In this paper,the material properties of steel cable of prestressed lamp frame after 13 years of service are studied experimentally.Except for the aging of PE protective layer,other properties basically meet the requirements of relevant standards.