大挑臂复合截面节段梁后装挑臂纵向预应力效应研究

Research of Longitudinal Prestressing Effect on Post-installation Cantilever of Large-cantilever Composite Cross-section Segmental Girder

摘要:

以3×50 m大挑臂复合截面节段梁为背景，通过建立空间杆系及实体有限元模型，针对复合截面节段梁特有的后装挑臂，对其纵向预应力效应进行研究，分析不同钢束类型及横向位置的后张拉效应，并推荐了合理的后张拉钢束布置形式。

Abstract:

Taking a 3×50 m large-cantilever composite cross-section segmental girder as the background, by establishing the spatial bar system and solid finite element model and aiming at the special post-installation cantilever of composite cross-section segmental girder, its longitudinal prestressing effect is studied. The post-tensioned effects of the different types and transverse positions of steel beam are analyzed. And the reasonable layout type of post-tensioned steel beam is recommended.