异形钢箱梁异形块梁底支座反力研究  

Research on the Bottom Support Reaction Force of the Special-shaped Block Beam of theSpecial-shaped Steel Box Girder

作　　者：杨志林 YANG Zhilin(Central&Southern China Municipal Engineering Design and Research Institute Co.,Ltd.,Wuhan 430014,Hubei,China)

机构地区：[1]中国市政工程中南设计研究总院有限公司,湖北武汉430014

出　　处：《工程技术研究》2024年第10期20-22,60,共4页Engineering and Technological Research

摘　　要：文章以某市政立交桥改造项目中的某联异形钢箱梁桥为例,研究了异形端支座反力与支座处横梁截面形式的关系。文章首先对该项目及其所采用的异形钢箱梁进行了概述,其次采用Midas Civil软件进行有限元建模,并对其进行支座反力计算,发现其异形端支座反力受横梁截面形式的影响较大,且当横梁采用箱型截面时,支座反力分布情况与其他截面形式存在显著区别。因此,进一步对支座反力与横梁截面的关系进行深入研究,最终确定箱型截面为最优横梁建模截面形式。Taking a special-shaped steel box girder bridge in a municipal overpass reconstruction project as an example,this paper studies the relationship between the support reaction force of the special-shaped end and the section form of the transverse beam at the support.Firstly,it provides an overview of the project and the specialshaped steel box girder it adopts.Secondly,Midas Civil software is used for finite element modeling,and the support reaction force is calculated.It is found that the support reaction force of the special-shaped end is greatly affected by the section form of the transverse beam,and when the transverse beam adopts the box section,the distribution of the support reaction force is significantly different from that of other section forms.Therefore,the relationship between the support reaction force and the transverse beam section is further studied,and the box section is finally determined as the optimal section form for transverse beam modeling.

关 键 词：异形钢箱梁 支座反力 横梁截面 有限元模型 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]