混凝土收缩徐变对斜拉桥受力性能的影响

The Influences of Shrinkage and Creep of Concrete on the Mechanical Properties on Cable-stayed Bridge of Main Girder

采用大型通用有限元分析软件SAP2000建立了一大跨斜拉桥的有限元模型,采用逐步分析有限元法分析研究混凝土的收缩徐变在斜拉桥施工过程中和成桥后对其主梁内力和变形、拉索拉力以及塔身竖向位移的影响。研究结果表明,收缩徐变在成桥以后的影响不可忽略,同时其研究结果可为相似斜拉桥工程的设计、施工以及成桥后的研究分析提供参考。

The universal finite element analysis software SAP2000 was used to build a finite element model on large span cable-stayed bridge, and a stepwise analysis finite element method was used to study the influences of concrete shrinkage and creep on the main beam inner force and deformation, cable tension and the tower body vertical displacement of cable-stayed bridge construction process and bridge. Research results show that the effects of shrinkage and creep in the finished bridge can not be ignored, and the results can be used as reference for the design of similar projects.