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Shear failure mechanisms of SCS sandwich beams considering bond-slip between steel plates and concrete

机译：考虑钢板与混凝土粘结滑移的SCS夹层梁的剪切破坏机理

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摘要

The steel-concrete-steel (SCS) sandwich structure has been proposed for containment buildings in third-generation nuclear power plants. In this paper, 27 static tests on SCS sandwich beams (by the authors and others) are adopted serially to summarize the failure modes and explore the failure mechanisms of SCS sandwich beams with different bond-slip conditions between the steel plate and concrete. Further, a three-dimensional finite element (FE) model is developed to simulate the ultimate strength of SCS sandwich beams under different failure modes. The accuracy of the developed FE model in predicting ultimate strength, cracking behaviours and bond slip behaviours is verified by static tests. Based on the validated FE model, 65 numerical cases are calculated to investigate the effects of analytical parameters on the failure mechanism and ultimate strength of SCS sandwich beams under different bond-slip conditions. The analytical parameters include the steel plate ratio, shear span to depth ratio, spacing of shear studs and shear reinforcement ratio. In addition, theoretical models are proposed to predict the ultimate strength of SCS sandwich beams under different bond-slip conditions. The accuracy of the theoretical model is verified by comparison with current design codes for SCS sandwich beams.
机译：已经提出将钢-混凝土-钢（SCS）夹层结构用于第三代核电厂的安全壳建筑。本文通过作者（作者和其他人）对SCS夹层梁进行了27次静态测试，以总结破坏模式，并探讨了钢板和混凝土之间具有不同粘结滑移条件的SCS夹层梁的破坏机理。此外，建立了三维有限元（FE）模型以模拟在不同破坏模式下SCS夹层梁的极限强度。静态测试验证了所开发的有限元模型在预测极限强度，开裂行为和粘结滑移行为方面的准确性。在验证的有限元模型的基础上，计算了65个数值实例，以研究分析参数对不同粘结滑移条件下SCS夹层梁破坏机理和极限强度的影响。分析参数包括钢板比，剪切跨度与深度之比，抗剪螺柱的间距和抗剪增强比。此外，提出了理论模型来预测在不同粘结滑移条件下SCS夹层梁的极限强度。通过与SCS夹层梁的当前设计规范进行比较，验证了理论模型的准确性。

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