波纹钢衬砌法兰接头受弯破坏模式与破坏机制研究  

Study on the Bending Failure Mode and Mechanism of Corrugated Steel Lining Flange Joints

作　　者：瞿山 黄煊博 丁文其[2,3] 张清照[2,3] QU Shan;HUANG Xuanbo;DING Wenqi;ZHANG Qingzhao(Yunnan Communications Investment Group Yunling Construction Co.,Ltd.,Kunming 650041;Department of Geotechnical Engineering College of Civil Engineering,Tongji University,Shanghai 200092;Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092)

机构地区：[1]云南交投集团云岭建设有限公司,昆明650041 [2]同济大学土木工程学院地下建筑与工程系,上海200092 [3]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》2025年第1期242-249,284,共9页Modern Tunnelling Technology

基　　金：云南省交通运输厅科技创新及示范项目课题(云交科教便[2022]25号).

摘　　要：为对比正、负弯矩工况下法兰接头的不同力学性能,开展波纹钢衬砌法兰接头的四点弯曲足尺试验,对比分析两种工况的破坏模式、M-θ曲线以及波纹钢应变,基于试验结果建立三维精细化有限元模型并验证其准确性,并提取螺栓与法兰板的应力曲线,揭示法兰接头的破坏机制。研究结果表明:(1)正、负弯矩工况下法兰接头的破坏模式分别为法兰板屈曲破坏与法兰板、螺栓局部到达应力极限导致的破坏;(2)法兰接头的M-θ曲线均呈三阶段增长趋势,正弯矩工况下的接头刚度、极限弯矩分别为负弯矩工况下的119.9%、124.2%;(3)正弯矩工况下波纹钢、螺栓、法兰板应力均小于负弯矩工况下的,正弯矩工况下波纹钢波谷与波中应变先受拉后受压,而负弯矩工况下波谷与波中持续受拉,正、负弯矩工况下结构在弹性阶段终点时法兰板均达到屈服,而螺栓尚未屈服。To compare the mechanical performance of flange joints under positive and negative bending moment con⁃ditions,four-point bending full-scale tests of corrugated steel lining flange joints were conducted.The failure modes,M-θcurves,and strain of corrugated steel under both conditions were analyzed.A three-dimensional re⁃fined finite element model was then developed and validated based on the experimental results,from which the stress curves of the bolts and flange plates were extracted to reveal the failure mechanism of the flange joint.The study results show that:(1)The failure modes of the flange joint under positive and negative bending moments are flange plate buckling failure and failure due to the local reaching of stress limits in the flange plate and bolts,respec⁃tively;(2)The M-θcurves of the flange joint exhibit a three-stage growth trend,with the joint stiffness and ultimate bending moment under positive bending being 119.9%and 124.2%of those under negative bending moment,re⁃spectively;(3)The stresses in the corrugated steel,bolts,and flange plate under positive bending are all smaller than those under negative bending.Under positive bending,the strain in the trough and middle of the corrugated steel first undergoes tension and then compression,while under negative bending,the strain in the trough and middle re⁃mains in tension.In both conditions,the flange plate reaches yielding at the end of the elastic stage,but the bolts have not yet yielded.

关 键 词：波纹钢衬砌 法兰接头 足尺试验 破坏机制 力学性能 

分 类 号：U451.4[建筑科学—桥梁与隧道工程]