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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >A posteriori error estimation and adaptive mesh refinement in chemoplastic analyses of shotcrete tunnel linings
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A posteriori error estimation and adaptive mesh refinement in chemoplastic analyses of shotcrete tunnel linings

机译：喷射混凝土衬砌化学分析中的后验误差估计和自适应网格细化

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This paper deals with the development of an error estimator for complex material models considering aging elasticity, cracking, and creep. Such material models are nowadays used in the context of hybrid finite element (FE) analyses of shotcrete tunnel linings. They allow to account for the interaction between the deformations of the surrounding soil and the hydrating shotcrete, providing the level of loading of the lining during the excavation of the tunnel. The proposed error estimator is based on a stress recovery scheme. The difference between the so-obtained improved stress field and the FE results is used for the determination of error measures related to the elastic, plastic, and viscous material response. The performance of the proposed error estimator in the context of adaptive mesh refinement is illustrated by a hybrid analysis of the Semmering pilot tunnel, recently constructed in Austria. First results obtained from uniform and adaptive mesh refinement are presented.
机译：本文讨论了考虑到老化弹性，开裂和蠕变的复杂材料模型的误差估计器的开发。如今，这种材料模型用于喷射混凝土隧道衬砌的混合有限元（FE）分析。它们可以解决周围土壤变形与水合喷射混凝土之间的相互作用，从而在隧道开挖期间提供衬砌的载荷水平。所提出的误差估计器基于应力恢复方案。如此获得的改善应力场与有限元结果之间的差异用于确定与弹性，塑性和粘性材料响应有关的误差度量。通过对最近在奥地利建造的Semmering引航道进行混合分析，说明了在自适应网格细化的情况下拟议误差估计器的性能。给出了从均匀和自适应网格细化获得的第一结果。

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