Finite element analysis is performed on four reinforced concrete coupling beams of intermediate length using 2-D plane stress elements, under monotonic load up to failure. The model is verified using the results from (Nabilah and Koh in KSCE J Civil Eng 21:2807–2813, 2017). The bond-slip interface for the longitudinal reinforcement is modeled in the finite element, as it is found that it better predicts the load-deformation behavior compared to perfect bond. The comparison between finite element analysis and the experiment found that the model is able to predict the overall behavior of the structure, especially the maximum load capacity. The maximum deformation and the shear deformation from the finite element analysis are found to be underestimated, due to the inability of the model to predict shear deformation accurately. Flexural deformation (due to flexure and slip) is found to be well predicted, as the bond-slip behavior is modeled in the analysis. Generally, the shear deformation and slip are found to be significant in the intermediate length coupling beam and should not be ignored in the analysis. Finally, the effective stiffness prediction using finite element analysis is found to be overestimated and should be determined instead using existing equations.

中文翻译：

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考虑粘结滑移界面的中长耦合梁有限元分析的发展

使用二维平面应力元素对四个中等长度的钢筋混凝土连梁进行有限元分析，在单调载荷下直至失效。该模型使用来自（Nabilah 和 Koh 在 KSCE J Civil Eng 21:2807–2813, 2017 中的结果）进行验证。纵向钢筋的粘结滑移界面在有限元中建模，因为发现与完美粘结相比，它可以更好地预测载荷变形行为。有限元分析与实验对比发现，该模型能够预测结构的整体行为，尤其是最大承载能力。由于模型无法准确预测剪切变形，因此发现来自有限元分析的最大变形和剪切变形被低估了。发现弯曲变形（由于弯曲和滑移）可以很好地预测，因为在分析中对粘合滑移行为进行了建模。通常，发现中间长度连梁的剪切变形和滑移是显着的，在分析中不应忽略。最后，发现使用有限元分析的有效刚度预测被高估，应改为使用现有方程来确定。