中央墩大悬臂桥梁下部结构静力分析  

Static Force Analysis on Substructure of Long Cantilever Bridge with Central Pier

作　　者：杨晔 YANG Ye(JSTI Group Co.,Ltd,Nanjing Jiangsu 210000China)

机构地区：[1]苏交科集团股份有限公司,江苏南京210000

出　　处：《江苏建筑》2022年第1期41-44,共4页Jiangsu Construction

摘　　要：中央墩大悬臂是地面空间受限情况下选用的一种桥梁下部结构形式。其特点是盖梁悬臂长、受力大,墩柱不平衡、弯矩大,结构设计时需要对其受力予以足够的重视。文章以某工程为背景,介绍了超宽中央墩大悬臂下部结构的设计及计算分析,并通过实体有限元的弹塑性分析进行验证;施工阶段及正常使用阶段,结构均满足规范要求,极限状态下结构安全系数大于1.5。The cantilever of central pier is a kind of bridge substructure when the ground space is limited.It is characterized by long cantilever of Cap beam, large force and large unbalance bending moment of pier column,so it is necessary to pay enough attention to its force in structural design.Based on the background of a project,the design and calculation analysis of the large cantilever understructure with super wide central pier are introduced, and the safety of the structure is verified by the elastoplastic analysis of solid finite element. In the construction stage and the normal use stage, the structure meets the requirements of the code, and the safety factor of the structure in the limit state is greater than 1.5.

关 键 词：中央墩 大悬臂盖梁 静力分析 弹塑性分析 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]