ABSTRACT The authors suggested mechanical connections for splicing two precast columns in their previous study. The present study proposes an efficient method of improving the performance of these connections consisting of laminated plates with additional interior stiffeners (interior bolts and rib stiffeners) to improve the efficiency of the design. The aim of this study was to develop a method for splicing two precast components using a pair of stiffened column plates with high-strength bolts, interior bolts and rib stiffeners, exploring the influence of the stiffened plates on the flexural capacity and the structural behavior of the mechanical connections. A non-linear finite element model was proposed considering damaged concrete plasticity, dilatancy accounting for the inelastic strains of the concrete materials, damage variables and plasticity and the concrete constitutive relationships, providing an efficient and dependable alternative to full-scale experimental investigations. This numerical investigation verified that the interior bolts and rib stiffeners contributed to developing optimized connections, enhancing the flexural resisting capacity of the spliced columns to almost the level of conventional monolithic cast-in-place columns. The abstract images illustrate the reduced deformation of the stiffened mechanical plates with the interior bolts obtained by the nonlinear finite element analysis. Graphical abstract

中文翻译：

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金属加筋层压板预制柱机械连接非线性有限元分析

摘要 作者在他们之前的研究中建议使用机械连接来拼接两个预制柱。本研究提出了一种提高这些连接性能的有效方法，该连接由带有附加内部加强筋（内部螺栓和肋骨加强筋）的层压板组成，以提高设计效率。本研究的目的是开发一种使用一对加筋柱板与高强度螺栓、内部螺栓和肋加强筋拼接两个预制构件的方法，探索加筋板对抗弯承载力和结构性能的影响。机械连接。提出了一种非线性有限元模型，考虑了损坏的混凝土塑性，剪胀考虑了混凝土材料的非弹性应变，损伤变量和塑性以及混凝土的本构关系，为全面的实验研究提供了一种有效且可靠的替代方案。该数值研究证实，内部螺栓和肋加强筋有助于开发优化连接，将拼接柱的抗弯能力提高到几乎与传统整体现浇柱的水平。抽象图像说明了通过非线性有限元分析获得的带有内部螺栓的加筋机械板的变形减少。图形概要 该数值研究证实，内部螺栓和肋加强筋有助于开发优化连接，将拼接柱的抗弯能力提高到几乎与传统整体现浇柱的水平。抽象图像说明了通过非线性有限元分析获得的带有内部螺栓的加筋机械板的变形减少。图形概要 该数值研究证实，内部螺栓和肋加强筋有助于开发优化连接，将拼接柱的抗弯能力提高到几乎与传统整体现浇柱的水平。抽象图像说明了通过非线性有限元分析获得的带有内部螺栓的加筋机械板的变形减少。图形概要