大悬臂预应力混凝土倒T盖梁设计与施工过程分析研究  

Analyze and Study on Design and Construction of Long-cantilever Pre-stressed Concrete Inverted-T Bent Cap

作　　者：李建强 孙立山 

机构地区：[1]上海市政工程设计研究总院集团广东有限公司,广东佛山528200 [2]中交第一航务工程局第四工程有限公司,天津市519000

出　　处：《城市道桥与防洪》2018年第8期141-144,185,共5页Urban Roads Bridges & Flood Control

摘　　要：城市桥梁建设中,因大悬臂倒T盖梁具有良好的视野和通行净空而被广泛采用,但其大多为跨高比较小的深受弯构件,不符合平截面和小变形假定,且内部体系受力复杂,施工过程中受力不对称,空间效应明显。为研究其空间受力特点,采用Midas FEA建立有限元模型,对其进行施工阶段和使用阶段受力分析,为类似设计和施工提供借鉴。The long-cantilever inverted-T bent cap is widely used in the construction of urban bridges because of its good view and traffic clearance. But it is mostly the smaller span-depth ratio of component and does not conform to the assumption of flat section and small deformation. And the internal system stress is complex, the stress is dissymmetric and the spatial effect is obvious in the construction process. In order to study its spatial stress characteristics, the finite element model is established by Midas FEA to analyze its stresses in the construction period and the service period, which can be refereed for the similar designs and constructions.

关 键 词：大悬臂预应力倒T盖梁 空间受力 施工过程 

分 类 号：U443.3[建筑科学—桥梁与隧道工程]