摘要
为研究两类结构构造形式不同的铁路斜拉桥主梁钢混结合段的受力性能,基于仿真分析对两类结合段的应力分布规律和传力特性进行对比分析,结果表明:长、短结合段在最不利工况下整体均处于受压状态,应力纵向分布除承压板处之外均较为平顺;应力横向分布均存在显著的不均匀性,表明结合段存在明显的剪力滞现象;两类结合段剪力连接件受力均呈马鞍形分布,结合段远离钢梁段的剪力连接件受力最大;长结合段的后承压板及短结合段的承压板处均存在集中传力,短结合段由于剪力连接件更少而承压板传力占比更高。两类结合段的传力性能虽有一定差异,但均能满足要求。
To investigate the mechanical performances of two types of steel-concrete joint sections in main girder of railway cable-stayed bridges,the stress distribution rules and force transferring characteristics of the two types of steel-concrete joint sections are compared and analyzed based on numerical analysis.The results indicate that under the most unfavourable conditions,both the long and short joint sections are integrally in compression and the longitudinal distributions of stress are both smooth except at the bearing plate.There is obvious nonuniformity in transverse distribution of the stress,which indicates that there is obvious shear-lag effect for two joint sections.The stress distribution of shear connectors in two types of steel-concrete joint sections is saddle-shaped.The shear connectors in steel-concrete joint section away the steel girder bear the maximum force.There is concentrated transfer force in both the rear bearing plate of long joint section and the bearing plate of short joint section,and the bearing plate of short joint section takes up a higher ratio of force transmission due to fewer shear connectors.Although there are some differences in the transmission performance of the two types of joint sections,both of them can meet the requirements.
作者
施洲
顾家昌
高贵
杨仕力
宁伯伟
SHI Zhou;GU Jiachang;GAO Gui;YANG Shili;NING Bowei(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Wuhan-Jiujiang Railway Passenger Line Hubei Limited Liability Company,Wuhan 430200,China;China Railway Major Bridge Reconnaissance&Design Institute Co.,Ltd.,Wuhan 430063,China)
出处
《铁道标准设计》
北大核心
2021年第12期85-90,115,共7页
Railway Standard Design
基金
中国铁路总公司科技研究开发计划重点课题(AJZH2020-001)。
关键词
铁路桥
混合梁斜拉桥
钢混结合段
受力性能
有限元分析
构造形式
railway bridge
hybrid girder cable-stayed bridge
steel-concrete joint
mechanical performance
finite element analysis
structural configuration
