U型薄壳渡槽施工及运营阶段受力仿真分析

Simulative analysis on construction and operation of U-shape aqueduct

对某渡槽在施工及正常运营阶段采用了单元生和死的技术及“时程”分析的方法进行了动态跟踪分析,得出了预应力U型薄壳渡槽在张拉纵、环向预应力锚索、装配横杆、造槽机移位过跨、载水运营以及在运营过程中遇到偶然荷载这一系列受载过程中,槽身混凝土的力学行为变化规律以及预应力钢绞线和混凝土这两种主要材料在不同受力阶段的力学行为变化的相互规律,为类似渡槽的设计和施工提供了理论依据。

From the dynamic trace analysis on the construction and the normal operation of a certain U-shape aqueduct with both the technique of controlling the element＇s birth and death and the “ Time-History” analysis method, the mechanics action＇s variation law of the concrete in aqueduct＇s body and of the two main materials, i.e. the prestressed steel twisted wire and concrete in prestressed U-shape thin shell aqueduct during a series of construction processes i.e. the courses of prestressing the longitudinal and circumferential tendons, assembling traversing lever, moving the aqueduct forming machine to cross-over span, being operated under water load and under accidental load action in operating process is known, which provides a theoretical reference for the design and construction of the simlar aqueduct.