潛盾工法在許多大都市皆被廣泛採用，配合開挖完成後的隧道斷面經常以預鑄之鋼筋混凝土環片作為永久性之結構體。因此環片在各種環境下之力學行為是一個眾所關切的問題，本文以傳統力學分析、有限元素法分析、及試驗結果相互比對希望能更加了解其各種力學行為。這篇文章探討的問題，為環片在試驗室中的支承與受力分析，分析之結果可藉由試驗數據加以比對。
傳統之分析方法採用桿件模型，並以極座標作為描述工具，搭配線彈性之假設進行分析。因簡化假設之故，傳統分析方法僅適用於試驗載重之初期階段。有限元素法分析利用套裝軟體FLAC 3D進行，並以莫耳庫倫(Mohr-Coulomb)非線性材料模型考慮，希望藉由材料非線性分析不僅模擬材料行為，更可對應開裂造成的軟化與後續的破壞加以模擬。

The tunnel rings were used widely in the city area.They are used as the permanent structure after the drilling procedure. Thestructural behavior is concerned by engineers. The study of this paper is devoted to the structural analysis of tunnel ring. Thearrangement of a laboratory test is analyzed. The analysis includes the traditional method and the finite element method. The purpose of this study tries to get the analysis data which can be used as the comparisons of test results.
The traditional analysis uses the frame element. The polar coordinate system was used in the analysis.The linear elastic assumption is adopted in this analysis.The nonlinear material model is assumed in the finite elementanalysis.The Mohr-Coulomb model is adopted for the concrete. The nonlinear geometry behavior can be simulated approximately in the analysis.

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