摘要
为了更好地对拱桥设计时拱座基础与地基基础的作用进行分析并为类似工程提供参考,本文通过MIDAS软件建立拱座基础和地基边坡三维有限元模型,基于界面单元模拟并研究基础和地基间接触面的应力特征,并与传统法和变形协调法等计算结果进行对比分析。结果表明:拱座-地基接触面上的应力沿横桥向和顺桥向的法向应力的分布并不均匀。其中横桥向表现为两侧边缘应力大,中间值较小;顺桥向在台阶折角处出现应力突变。考虑结构间非线性作用的有限元计算结果介于两种常用方法之间,结果较为合理,且能够更直观、更全面地反映结构间应力特征。
In order to better analyze the interaction of abutment step foundation and ground in arch bridge design and provide reference for similar projects,a three-dimensional finite element model of arch foundation and ground slope was established to simulate and study the stress characteristics of the contact surface between foundation and ground based on the interface element,and the analysis was compared with the calculation results of traditional method and deformation coordination method.The results show that the stress distribution of the arch foundation contact surface along the transverse bridge and along the bridge is not uniform.In the transverse bridge direction,the stress on both sides of the edge is relatively large and the middle value is small.A-long the bridge direction,the stress mutation occurs at the step comer.The result of finite element calculation considering the nonlinear interaction is between the two commonly used methods,and more reasonable,and can reflects the stress characteristics of structures more directly and comprehensively.
作者
徐辉
肖云飞
马雪平
孙晨然
张少庆
Xu Hui;Xiao Yunfei;Ma Xueping;Sun Chenran;Zhang Shaoqing(North China Municipal Engineering Design&Research Institute Co.,Ltd,Tianjin 300074,China)
出处
《特种结构》
2023年第2期45-49,共5页
Special Structures
关键词
拱座台阶基础
有限元分析
接触分析
基底应力
Abutment step foundation
Finite element analysis
Contact analysis
Base stress
