连续刚构拱桥梁拱墩结合部位传力机制研究
Research on the Force Transmission Mechanism at the Beam-Arch-Pier Joint in Continuous Rigid Frame Arch Bridge
张蕾1
作者信息
- 1. 中铁第一勘察设计院集团有限公司,陕西 西安 710043
- 折叠
摘要
文章以西延高铁王家河特大桥为工程背景,建立梁拱墩结合处的局部实体模型,并分析该部位的空间应力状态,掌握应力集中区域和薄弱位置,探讨内力分配机制及传递规律,旨在为梁拱墩结合部位设计提供理论基础和数据支撑.研究表明,拱肋与拱脚结合部位拱肋长度1/3.2范围内为应力传递的特征长度,梁拱墩连接处主梁长度 1/4.5范围内为应力传递的特征长度;梁拱结合部位中支点截面拱肋通过加劲缀板等将81.2%的内力扩散至拱脚混凝土.
Abstract
Based on the engineering background of Wangjiahe Super-large Bridge on Xi'an-Yan'an High-speed Railway,this paper establishes the local solid model of the beam-arch-pier joint,analyzes the spatial stress state of the joint,grasps the stress concentration area and weak position,and discusses the internal force distribution mechanism and transmission law,aiming to provide theoretical basis and data support for the design of the beam-arch-pier joint.The results show that the range of 1/3.2 of the length of the arch rib at the junction of the arch rib and the arch foot is the characteristic length of stress transmission,and the range of 1/4.5 of the length of the main beam at the junction of the beam,arch,and pier is the characteristic length of stress transmission.The arch rib at the middle support section at the junction of the beam and arch diffuses 81.2%of the internal force to the arch foot concrete through the stiffed gusset plate.
关键词
连续刚构拱桥/梁拱墩结合部位/应力分布/力学性能传递/有限元分析Key words
continuous rigid frame arch bridge/beam-arch-pier joint/stress distribution/mechanical performance transmission/finite element analysis引用本文复制引用
基金项目
陕西省重点研发计划项目(2022GY-338)
中国铁建股份有限公司科技研究课题(2020-C45)
出版年
2024
NETL
NSTL
万方数据