新型装配式铁路便梁钢支墩栓接钢节点力学性能分析  

Mechanical Performance Analysis of Bolted Steel Joints for New Prefabricated Railway Beam Steel Support Piers

作　　者：王智航 方跃伟 朱兆斌[3] 黄铭权 王炎[1] Wang Zhihang;Fang Yuewei;Zhu Zhaobin;Huang Mingquan;Wang Yan(School of Architecture and Engineering,Zhejiang Sci-Tech University of Technology,Hangzhou 310018,China;Hangzhou Railway Hub Construction Headquarters,China Railway Shanghai Bureau Group Co.,Ltd.,Hangzhou 311500,China;Hangzhou Railway Design Institute Co.,Ltd.,Hangzhou 310016,China)

机构地区：[1]浙江理工大学建筑工程学院,杭州310018 [2]中国铁路上海局集团有限公司杭州铁路枢纽工程建设指挥部,杭州311500 [3]杭州铁路设计院有限责任公司,杭州310016

出　　处：《科技通报》2024年第7期89-96,共8页Bulletin of Science and Technology

基　　金：浙江省交通投资集团有限公司科技计划项目(202304)。

摘　　要：本文基于对传统混凝土结构铁路通用便梁临时支墩进行设计和优化,提出一种新型装配式栓接钢箱梁结构形式的铁路通用便梁支墩,该新型结构相较于传统的铁路便梁支墩而言,具有工厂加工简单、减少施工周期、可以重复利用、具有较高的经济效益等优点,可广泛应用于下穿铁路轨道顶推施工时便梁支墩的架设。新型铁路便梁支墩采用栓接装配式结构,栓接作为整体结构的关键受力节点,其安全性和可靠性至关重要。因此本文通过建立ABAQUS有限元模型,对其整体结构及其分节段处栓接节点进行非线性及失效模式分析。分析结果表明:新型装配式钢结构便梁支墩整体未出现失稳现象,结构整体性能完好。栓接节点的受力特性为底板螺栓孔在弹性节段时承受主要荷载,在底部螺栓孔达到塑性后侧板螺栓孔开始承受主要荷载,最终底板及侧板螺栓孔同时发生剪切破坏。设计时应考虑对底板和侧板的螺栓连接部位进行加强,适当提高其抵抗冲切破坏的能力。Based on the design and optimization of traditional concrete structure railway general temporary support piers,a new type of prefabricated bolted steel box girder structure for railway general temporary support piers is proposed.Compared with traditional railway temporary support piers,this new structure has the advantages of simple factory processing,reduced construction cycle,reusable use,and high economic benefits,it can be widely used for the installation of temporary beam piers during the construction of underpass railway track launching.The new type of railway beam support pier adopts a bolted assembly structure,and as a key load-bearing node of the overall structure,the safety and reliability of the bolted connection are crucial.Therefore,this study established an ABAQUS finite element model to conduct nonlinear and failure mode analysis of its overall structure and bolted joints at its segments.The analysis results indicate that the new prefabricated steel structure has no overall instability of the beam support pier,and the overall performance of the structure is intact.The stress characteristics of bolted joints are that the bottom plate bolt holes bear the main load in the elastic section,and after the bottom bolt holes reach plasticity,the side plate bolt holes begin to bear the main load.Finally,both the bottom plate and side plate bolt holes undergo shear failure.When designing,it should be considered to strengthen the bolted connection parts of the bottom plate and side plate,and appropriately improve their ability to resist punching and cutting damage.

关 键 词：铁路便梁支墩 钢结构 装配式 栓接 有限元分析 

分 类 号：U447[建筑科学—桥梁与隧道工程]