装配式地铁车站结构接头非线性弯曲模式识别  

Identification of Nonlinear Bending Modes in Joints of Assembled Subway Stations

作　　者：黄林冲 张燕丽 梁禹 林存刚 蒋凯 王晓良 HUANG Linchong;ZHANG Yanli;LIANG Yu;LIN Cungang;JIANG Kai;WANG Xiaoliang(School of Civil Engineering,Sun Yat-Sen University,Zhuhai 519000,China;School of Aeronautics and Astronautics,Shenzhen Campus of Sun Yat-Sen University,Shenzhen 518107,China;China Railway 14th Bureau Group Tunnel Engineering Co.,Ltd.,Jinan 250000,China)

机构地区：[1]中山大学土木工程学院,广东珠海519000 [2]中山大学·深圳航空航天学院,广东深圳518107 [3]中铁十四局集团隧道工程有限公司,山东济南250000

出　　处：《同济大学学报(自然科学版)》2025年第2期187-195,共9页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金(51978677);广东省基础与应用基础研究基金(2023A1515030258)。

摘　　要：为了探究装配式结构环向接头在弯矩和轴力共同作用下产生的非线性特征,基于接头处的接触状态、受力特征和变形协调关系,提出了压弯、纯弯和拉弯受力状态下的力学模型,分析了弯曲变形发展过程的内力区域分布及其识别方法,并运用三维数值模型进行验证。研究发现,接头的主要变形历程可由4种弯曲模式进行表征,将具体构件尺寸和材料参数代入相关转角表达式中即可判断接头处于何种发展过程。通过现场实测弯矩值和轴力值可准确识别环向接头的弯曲模式,并给出接头随弯矩变化的力学特征及安全状态。This paper investigated the nonlinear characteristics of the annular joints of assembled structures under the action of bending moment and axial force.Based on the contact state,force characteristics,and deformation coordination relationship at joints,a mechanical model was proposed for the stress states of compression-bending,pure bending,and tension-bending.The distribution of internal force regions in the development process of bending deformation and its identification method were analyzed.A three-dimensional numerical model was adopted to validate it.It is shown that the main deformation process of the joint can be characterized by four bending modes.The specific dimensions and material parameters of the components can be substituted into the relevant angle expressions to determine the development process of joints.On-site measurement of bending moment and axial force indicates that the bending modes of the annular joint can be accurately identified,and the mechanical characteristics and safety status of the joint can be provided.

关 键 词：装配式结构 环向接头 接头张开 弯曲模式 状态非线性 

分 类 号：U231.4[交通运输工程—道路与铁道工程]