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本文进行不同长度及围压情况下拉出试验，并发展非线性加劲元素模拟柔性加劲材，以达到“完全非线性”有限元分析柔性加劲材拉出试验行为之目的。研究结果显示，有限元分析值与试验量测值相比较甚为合理，进而证明其中存在临界围压与临界长度之关系，使得加劲材之拉出破坏与拉断破坏同时产生。本研究同时指出“阶段性传递应力”模式虽然可解释加劲材在拉出破坏模式下之力学行为，但在拉断破坏时，摩擦应力将受限于前或中三角形分布阶段而已，不会传递至埋置尾端
In this paper, tests are carried out with different lengths and confining pressure conditions, and nonlinear stiffening elements are used to simulate flexible stiffeners in order to achieve “completely nonlinear” finite element analysis of the pull-out test behavior of flexible stiffeners. The results of the research show that the finite element analysis value is quite reasonable compared with the experimental measurement value, and further proves that there is a relationship between the critical confining pressure and the critical length, so that the pull-out damage and tensile fracture of the stiffener are produced at the same time. This study also pointed out that although the “phase transfer stress” model can explain the mechanical behavior of stiffeners in the pull-out failure mode, the frictional stress will be limited to the front or middle triangle distribution stage during breakage failure and will not be transmitted. To buried end