极限荷载条件下盾构管片接头模型比较研究

董新平

极限荷载条件下盾构管片接头模型比较研究 English Version

董新平

郑州大学交通工程系，河南郑州 450002

详细信息

作者简介:
董新平(1970- )，男，河南淇县人，博士，副教授，主要从事隧道及地下空间的研究。E-mail: dxp3000@163.com。

中图分类号: U455.7
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出版历程
- 收稿日期: 2012-11-30
- 发布日期: 2013-06-19

Benchmark analysis of segment joint model for segmented tunnel lining in ultimate limit state

DONG Xin-ping

Department of Communication Engineering, Zhengzhou University, Zhengzhou 450002, China

摘要

摘要: 为了解盾构隧道装配式管片接头在极限荷载条件下的力学性状，在对既有管片接头模型综合分析比较基础上，提出采用平面应力模型结合混凝土脆性破坏准则及不抗拉节理单元（Goodman单元）作为接头分析的计算模型，并以接头破坏试验实测数据为标准，对提出的分析方法进行了验证。计算结果与实测结果的对比表明，获得的接头转角-弯矩曲线可较好地逼近试验曲线，与试验结果基本一致。可以采用这两种模型对接头在极限荷载条件下的受荷过程做精细分析。
- 隧道工程 /
- 管片接头 /
- 准分析 /
- 极限状态
Abstract: To investigate the behavior of the segment joint of the segmented tunnel lining in the ultimate limit state, a plane stress model，in conjugation with the brittle cracking constitutive equation of concrete and the joint element (Goodman element), is presented based on the comparison among the elastic beam-spring model, elastic beam-joint element model, solid element-contact surface model and so on. Taking the experimental results of full-scale tests on segment joint as the benchmark, the analysis methods are verified in terms of the load capacity and the bending moment-rotation relation. The moment-rotation curve from the FEM simulation shows a good agreement compared to the experimental data. From the benchmark analysis, it can be concluded that the nonlinear behavior of segment joint is captured exactly by the plane stress model, and that it can be utilized to scan and trace the initiation and development of crack and crush of the segment joint.
- tunnel engineering /
- segment joint /
- benchmark analysis /
- ultimate limit state

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参考文献(16)

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