单索面矮塔斜拉桥主梁无索区长度变化影响分析

Non-cable regions in girder effect analysis of the single-cable-stayed extradosed bridge

以云南省瑞丽江矮塔斜拉桥工程实例为研究背景,采用大型有限元分析软件Midas/Civil建立有限元模型进行分析。探讨了矮塔斜拉桥塔根无索区长度及边支座无索区长度对成桥阶段主梁变形、内力以及斜拉索的索力等的影响,得出了合理无索区长度的取值范围,对进一步认识矮塔斜拉桥的结构性能及总体布置设计有一定的参考意义。

This paper takes Yunnan Province Ruili River low tower cable- stayed Bridge as the engineering background by using the large- scale general finite element analysis software Midas / Civil to set up finite element computing model。Investigates the influence on the deformation,inner force of the main girder and cable force etc under dead load by adjusting the length of the no cable section near the tower and the length of no cable area near the side bearing and obtain the suitable length of the no cable areas,there is a certain reference value to understand the structural properties and the overall layout design of the low tower cable- stayed bridge.