Shear deformation characteristics and failure mechanisms of tunnel segment inter-ring joints: Numerical and experimental study

被引:7
|
作者
Liu, Xiaohui [1 ]
Zhang, Jingxuan [1 ]
Feng, Kun [1 ]
Xue, Haoyun [1 ]
Jin, Zhenyu [1 ]
He, Chuan [1 ]
机构
[1] Southwest Jiaotong Univ, Key Lab Transportat Tunnel Engn, Minist Educ, Chengdu 610031, Sichuan, Peoples R China
基金
国家重点研发计划;
关键词
Shield tunnel; Inter -ring joints; Failure mechanisms; Shear capacity; Numerical simulation; Full-scale experiment; REINFORCED-CONCRETE; BENDING BEHAVIOR; SHIELD TUNNEL;
D O I
10.1016/j.engfailanal.2024.108045
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The dislocation of inter -ring joints in tunnel segments poses a significant risk to tunnel structural safety. Therefore, gaining insights into the shear deformation and failure behavior of these interring joints is paramount. In this study, we developed a robust three-dimensional numerical simulation model grounded in the concrete damaged plasticity (CDP) constitutive model. Complementing this, full-scale experiments were conducted on circumferential joints, subjecting them to both positive and negative shear loads. To enhance our understanding, we employed distributed optical fiber sensing (DOFS) and acoustic emission (AE) detection technologies. Our investigation delved into the deformation process, mechanical behavior of bolts, and failure characteristics of inter -ring joints featuring double bolt -tenon and mortise structures. Various parameters were explored, including longitudinal force, bolt preload, and the height -to -thickness ratio of the tenon and mortise (h/t). Notably, our results unveiled distinct stages in the shear deformation process of the joints. In the final failure stage, the tenon exhibited crushing failure, while the mortise underwent shear failure. As the h/t ratio increased, the mortise's failure mode transitioned from overall failure at the root to localized failure at the contact area. Analyzing the mechanical behavior of bolts, we observed more favorable outcomes in positive shear than in negative shear. Bolt preload emerged as a modest factor for enhancing the load -carrying capacity of the joint in positive shear, with minimal impact in negative shear. Furthermore, an increase in longitudinal force was found to positively enhance the joint's load -carrying capacity in both shear conditions. Our findings contribute valuable insights for optimizing the design and safety considerations of tunnel structures.
引用
收藏
页数:20
相关论文
共 50 条
  • [41] Complex Deformation Monitoring of Shield Tunnel Segment Joints Using Distributed Fiber Optic Sensing Technology: Experimental Verification
    Zhang, Lei
    Cui, Yifei
    Shi, Bin
    IEEE SENSORS JOURNAL, 2022, 22 (04) : 3236 - 3245
  • [42] Shear failure process of rectangular tunnel: Physical experimental test and numerical back-analysis
    Jiang, Quan
    Xin, Jie
    Xu, Dingping
    Liu, Qiang
    THEORETICAL AND APPLIED FRACTURE MECHANICS, 2022, 120
  • [43] Experimental and Numerical Study on Shear Behaviour of Bolted Inter-Modular Connection
    Rajanayagam, Heshachanaa
    Gunawardena, Tharaka
    Mendis, Priyan
    Poologanathan, Keerthan
    Gatheeshgar, Perampalam
    Nagaratnam, Brabha
    Corradi, Marco
    ce/papers, 2023, 6 (3-4) : 1375 - 1380
  • [44] Shear deformation characteristics of a flexible casing in gob gas ventholes: Experimental and numerical investigation
    Jiang, Mingjun
    Liu, Yingke
    Yuan, Man
    Long, Zhaoxi
    Yang, Yugui
    Kang, Jianhong
    Wang, Fengchao
    Niu, Yue
    MEASUREMENT, 2022, 198
  • [45] Experimental and Numerical Analyses of Shear Failure Mechanisms of Rock Bolt Surrounded by Bedded Rock
    Fu, Jinwei
    Sarfarazi, Vahab
    Haeri, Hadi
    Zarei, Alireza Seifi
    Bahrami, Reza
    Imani, Mehrdad
    Marji, Mohammad Fatehi
    INTERNATIONAL JOURNAL OF GEOMECHANICS, 2024, 24 (12)
  • [46] Finite element analysis and experimental study on the deformation characteristics of lock ring
    Gurusamy, P.
    Raj, S. Hari Krishna
    Devarajan, S.
    Kumar, S. Dinesh
    Mahesh, R.
    Subash, P.
    MATERIALS TODAY-PROCEEDINGS, 2020, 33 : 3208 - 3211
  • [47] Experimental and numerical study of smoke temperature distribution characteristics in a sloped tunnel
    Yang, Yuxuan
    Long, Zeng
    Cheng, Huihang
    Chen, Junfeng
    Liu, Chang
    Zhong, Maohua
    SUSTAINABLE CITIES AND SOCIETY, 2021, 73
  • [48] Numerical and experimental study on smoke diffusion characteristics of tunnel with ceiling beams
    Tian, Xiangling
    Ding, Xiaoqiang
    Xiang, Linchuan
    Liu, Chang
    Fu, Shigen
    Zhong, Maohua
    SCIENTIFIC REPORTS, 2024, 14 (01):
  • [49] Experimental study on shear dilatancy characteristics of thinly-infilled rock joints
    Xiao W.-M.
    Yu H.
    Zhu Z.-Y.
    Li R.
    Liu W.-C.
    Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering, 2020, 42 (08): : 1499 - 1508
  • [50] Influencing Factors of Shear Instability Characteristics of Rock Joints: Experimental and Theoretical Study
    Dong, Hangyu
    Guo, Baohua
    Ma, Qing
    Si, Kai
    Wang, Hongjian
    APPLIED SCIENCES-BASEL, 2025, 15 (02):