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

作　　者：严搏 郭济 卢永成 YAN Bo;GUO Ji;LU Yongcheng

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海市200092

出　　处：《城市道桥与防洪》2021年第10期110-113,M0011,共5页Urban Roads Bridges & Flood Control

摘　　要：以3×50m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。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.

关 键 词：大挑臂 复合截面节段梁 后装挑臂 后张拉钢束 纵向预应力效应 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]