盾构隧道纵缝接头抗弯计算模型研究
发布时间：2018-10-23 15:30
【摘要】：针对不设传力衬垫的盾构隧道纵缝接头,基于已有的管片接头抗弯性能试验的结果,首次提出与接头应力相关的刚度折减系数的概念,并给出其取值经验的公式。在此基础上推导纵缝接头转角弯矩关系的显式解析公式,可直接应用于盾构隧道的结构受力分析。所推导的解析公式可以较好地反映接头轴力对其抗弯力学行为的影响,描述管片接头抗弯刚度随转角增大而减小直至破坏的整个过程。与管片接头足尺试验结果的对比表明,该解析解与试验结果吻合得较好,有重要的工程应用价值。
[Abstract]:For the longitudinal joint of shield tunnel without force transfer cushion, the concept of stiffness reduction coefficient related to joint stress is put forward for the first time, based on the results of bending performance tests of existing segment joints, and the empirical formula is given. On this basis, the explicit analytical formula of the angular moment relationship of longitudinal joint can be derived, which can be directly applied to the structural stress analysis of shield tunnel. The analytical formula can reflect the influence of axial force on the bending behavior of the joint, and describe the whole process that the bending stiffness of the segment joint decreases with the increase of the turning angle until the failure. The comparison with the full-scale test results of the segment joint shows that the analytical solution is in good agreement with the experimental results and has important engineering application value.
【作者单位】： 中交第二公路勘察设计研究院有限公司;中国科学院武汉岩土力学研究所;
【基金】：交通部西部交通建设科技项目(2013 318 Q03 030)~~
【分类号】：U455.43
本文编号：2289662
[Abstract]:For the longitudinal joint of shield tunnel without force transfer cushion, the concept of stiffness reduction coefficient related to joint stress is put forward for the first time, based on the results of bending performance tests of existing segment joints, and the empirical formula is given. On this basis, the explicit analytical formula of the angular moment relationship of longitudinal joint can be derived, which can be directly applied to the structural stress analysis of shield tunnel. The analytical formula can reflect the influence of axial force on the bending behavior of the joint, and describe the whole process that the bending stiffness of the segment joint decreases with the increase of the turning angle until the failure. The comparison with the full-scale test results of the segment joint shows that the analytical solution is in good agreement with the experimental results and has important engineering application value.
【作者单位】： 中交第二公路勘察设计研究院有限公司;中国科学院武汉岩土力学研究所;
【基金】：交通部西部交通建设科技项目(2013 318 Q03 030)~~
【分类号】：U455.43
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