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| 盾构隧道管片衬砌力学行为的区间不确定性分析 |
| An interval uncertainty analysis on the mechanical behavior of segment lining of shield tunnel |
| 投稿时间：2018-11-07 修订日期：2018-12-01 |
| DOI： |
| 中文关键词: 盾构隧道 管片衬砌 梁-弹簧模型 区间不确定性 |
| 英文关键词: shield tunnel segmental lining beam-spring model interval uncertainty |
| 基金项目:国家重点基础研究发展计划（973计划）,国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 以琼州海峡盾构隧道为研究背景，基于梁-弹簧有限元模型，考虑初始设计阶段中相关参数的不确定性，将侧向土压力系数、地层抗力系数、接头等效抗弯刚度考虑为区间不确定性变量，建立了管片衬砌结构的区间不确定性问题的数值求解模型，推导了影响度计算公式，可估计轴力、弯矩、安全系数的上下界及各不确定性变量的贡献。通过数值分析，探讨了区间不确定性对管片衬砌结构力学行为的影响。论文工作有望为管片衬砌的鲁棒和优化设计提供有价值的参考。 |
| 英文摘要: |
| With a consideration of preliminary design of segment lining of Qiongzhou Strait shield tunnel, the coefficients of lateral earth pressure, subgrade reaction, and the equivalent flexural rigidity of segment joints are considered as the interval variables, and a beam-spring model based numerical framework is built up for the interval uncertainty analysis. Upper and lower bounds of axial force, bending moment and safety factor can be provided, and the impact of an individual interval variable on the mechanical behavior of segment lining can be evaluated by utilizing an approximation of one-order partial derivatives. The work presented in this paper is hopefully valuable for the robust optimization design of segment lining. |
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