U型渡槽由于自重较轻,在施工上相对于矩形渡槽有较大的优势,因此在南水北调工程中具有较大的运用前景,而温度荷载是大型渡槽的重要荷裁之一,由于其计算较为复杂,目前对大型渡槽的研究较少。采用三维有限元方法分析了重力荷裁作用下的大型U形渡槽的受力特点,给出了相应的预应力钢筋布置方案,并通过瞬态有限元方法计算了夏季日照与冬季寒潮两种最不利工况下的渡槽应力值,并分析了温度荷裁对大型U形预应力渡槽的影响。
Firstly, the scheme of prestressed reinforcement has been given based on an analysis of gravity loads on the U-shape concrete aqueducts. Then the effect of temperature load on large-scale prestressed U-shape concrete aqueducts has been analyzed by using the transient analysis type of FEM.