波纹钢衬砌法兰接头受弯力学性能数值分析  

Numerical Analysis of Bending Mechanical Properties of Flange Joint of Corrugated Steel Lining

作　　者：黄煊博 丁文其[1,2] 张清照[1,2] HUANG Xuanbo;DING Wenqi;ZHANG Qingzhao(Department of Geotechnical Engineering,College of Civil Engineering,Tongji University,Shanghai 200092;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education,Tongji University,Shanghai 200092)

机构地区：[1]同济大学土木工程学院地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《现代隧道技术》2024年第1期96-106,共11页Modern Tunnelling Technology

基　　金：国家重点研发计划项目(2021YFC3002004);国家自然科学基金面上项目(52378405).

摘　　要：为进一步研究波纹钢衬砌法兰接头受弯力学性能及其影响因素,建立波纹钢衬砌法兰接头的四点弯曲计算模型并验证其准确性。以波纹钢型号、法兰板厚度和螺栓型号为变量设计正交试验,通过变形云图总结破坏模式,对M-θ曲线的原点刚度与极限弯矩进行方差、极差分析,再结合法兰板与螺栓的应力-弯矩曲线揭示结构破坏时构件的相互作用机理,最后提出弯矩系数α以定量区分法兰接头类型。研究结果表明:结构原点刚度受波纹钢型号影响最大;正弯矩荷载下极限弯矩由法兰板起主导作用,其破坏模式为法兰板面外屈曲破坏,螺栓对其影响不大但应力已达极限;负弯矩荷载下极限弯矩受螺栓与法兰板共同影响,破坏模式可根据变形特征分为法兰板控制型、螺栓控制型和综合控制型,所提出的相对弯矩系数α可准确定量区分其破坏模式;在纯弯荷载下法兰板与螺栓最大Mises应力均呈现四阶段增长特征,负弯矩荷载下的法兰板最大Mises应力随螺栓型号变化不显著。In order to further investigate the bending mechanical properties of the flange joint of corrugated steel lining and the influencing factors,the four-point bending calculation model for flange joint of corrugated steel lining has been created and its accuracy has been verified.An orthogonal test is designed,where the corrugated steel model,flange plate thickness and bolt model are the variables.The failure modes are identified by using the deformation contour plot.The variance analysis and range analysis of the origin stiffness and ultimate bending moment of M-θcurve are conducted.Then the mechanism of interaction of the components in the case of structural failure is re⁃vealed with the help of the stress-bending moment curves of flange plate and bolt.At last,the bending moment coeffi⁃cientαis proposed,to quantitatively differentiate the types of flange joints.As the study results indicate:the stiff⁃ness of the structure origin is affected by the corrugated steel model the most.Under positive bending moment load,the ultimate bending moment is dominated by the flange plate,and the failure mode is out-of-plane buckling of flange plate;bolts do not affect it much,but the stress is already at its limit.Under negative bending moment load,the ultimate bending moment is affected by both the bolt and flange plate,and the failure mode can be controlled by the flange plate,bolt or both;the relative bending moment coefficientαproposed can be used to quantitatively and accurately identify the failure mode.Under pure bending load,the maximum Mises stress of flange plate and bolt ex⁃periences four-stage growth.Under negative moment load,the maximum Mises stress of flange plate does not change significantly with the bolt model.

关 键 词：波纹钢衬砌法兰接头 正交试验 接头刚度 极限弯矩 数值分析 

分 类 号：U451.4[建筑科学—桥梁与隧道工程]