Numerical simulation and parametric analysis of seismic performance of a new combined encased joint

IF 4.3 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2025-05-09 DOI:10.1016/j.istruc.2025.109099

Xiuzhen Pan , Jie Gao , Hongchao Guo , Qin Zhao , Peng Zhang , Dengyun Zhao , Huan Gao

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引用次数: 0

Abstract

The steel structure is an ideal choice for the storey-adding of existing reinforced concrete (RC) frame structures, and their connection joint with RC frames is the key to the seismic performance of this complex structural system. Based on the traditional exposed rigid joint, a new combined encased joint that could improve the bearing capacity and the overall collaborative performance was proposed in this study. Its seismic performance and influence of related parameters were studied by ABAQUS. The results indicated that the new joint finally showed the plastic hinge damage at the beam end far away from the joint domain. It had better energy dissipation capacity and bearing capacity than the exposed rigid joint, and the restraining effect on the superstructure and the overall collaborative performance was stronger. When the axial compression ratio was less than 0.32 and met the specification requirements, the joint not only maintained a good capacity for plastic deformation and energy dissipation but also avoided stress concentration. The thickness of the profiled splicing plate had little effect on the seismic performance of the new joint, so it only needed to meet the requirements of stiffness. The above research results can provide a scientific reference for engineering design.

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新型组合式封闭式节理抗震性能数值模拟与参数分析

钢结构是现有钢筋混凝土框架结构加层的理想选择，钢结构与钢筋混凝土框架的连接节点是这种复杂结构体系抗震性能的关键。本文在传统暴露刚性节点的基础上，提出了一种新型的组合式封闭式节点，以提高其承载能力和整体协同性能。采用ABAQUS软件对其抗震性能及相关参数的影响进行了研究。结果表明，新节点最终在远离节点区域的梁端出现塑性铰损伤。其耗能能力和承载能力均优于裸露刚性节点，对上部结构和整体协同性能的抑制作用更强。当轴压比小于0.32且满足规范要求时，节理既保持了良好的塑性变形和耗能能力，又避免了应力集中。异形拼接板的厚度对新节点的抗震性能影响不大，只需满足刚度要求即可。上述研究成果可为工程设计提供科学参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.