In this study, the steel box connector is proposed as a solution to improve the response of a precast structure under static and dynamic loads, especially the intermediate moment frame of a beam–column structure. The performance of the steel box connector with steel reinforcement and beam structure was investigated by experiment and finite element analysis. A steel box connector (SBC) designed with special characteristics and different thicknesses of 20–25 mm were considered and evaluated through tensile tests of the SBC-steel rod, SBC-steel reinforcement and flexural tests of beams with SBC and mechanical connector. The specimens with SBC exhibited good response with a high load capacity from 378-488kN and small displacement. The cracking status, failure mode and behavior of the SBC elements, including the box section, steel rod, steel bars, and beam structure, showed the same behavior in experimental and 3D modeling results. In addition, the simulation analysis was in good agreement with the experimental results with a difference under 15%. The investigation, evaluation, and verification of the steel box connector performance helps ensure the optimized application of SBC in precast structures.

中文翻译：

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预制混凝土连接中钢箱连接件结构性能的实验-有限元分析


在这项研究中，提出了钢箱连接件作为改善预制结构在静载荷和动载荷下的响应的解决方案，特别是梁柱结构的中间力矩框架。通过试验和有限元分析研究了钢筋梁结构钢箱连接件的性能。通过SBC-钢杆、SBC-钢筋的拉伸试验以及带有SBC和机械连接器的梁的弯曲试验，考虑并评估了具有特殊特性和20-25 mm不同厚度的钢箱连接器（SBC）。具有 SBC 的样本表现出良好的响应，具有 378-488kN 的高负载能力和小位移。 SBC 单元（包括箱形截面、钢杆、钢筋和梁结构）的开裂状态、失效模式和行为在实验和 3D 建模结果中表现出相同的行为。此外，仿真分析与实验结果吻合较好，误差在15%以内。钢箱连接器性能的调查、评估和验证有助于确保SBC在预制结构中的优化应用。