| 引用本文: | 李赟,程欣,安毅,杨旭,路国运,刘建飞.新型阶梯型节点悬臂段抗震性能试验及有限元分析[J].哈尔滨工业大学学报,2025,57(2):131.DOI:10.11918/202311045 |
| LI Yun,CHENG Xin,AN Yi,YANG Xu,LU Guoyun,LIU Jianfei.Experimental and finite element analysis of seismic performance for novel stepped joint with cantilever segment[J].Journal of Harbin Institute of Technology,2025,57(2):131.DOI:10.11918/202311045 |
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| 摘要: |
| 针对外伸悬臂式拼接全螺栓连接节点梁翼缘很难同时保证上下表面平齐与足够抗震性能的问题,提出一种新型阶梯型全螺栓连接梁柱节点。对两个不同端板连接面形式的悬臂型节点试件进行低周往复加载试验,通过对试件的破坏模式、滞回曲线、骨架曲线、承载力、延性及耗能能力等进行分析,考察该类型节点的抗震性能,并分析厚端板与U型卡扣连接形式对抗震性能的影响。结果表明:不同连接面形式对节点的弹性段性能影响较小,对节点最终破坏形式影响较大；厚端板阶梯型节点具有良好的承载性能和变形性能,U型卡扣节点抗震性能较差。并以厚端板试件为例进行有限元模型的建立与校核,通过有限元软件改变参数探究端板厚度对新型节点抗震性能的影响,发现随着端板厚度的降低,节点初始刚度、承载能力及耗能能力均随之降低。 |
| 关键词: 装配式钢结构 阶梯型节点 拟静力试验 抗震性能 有限元分析 |
| DOI：10.11918/202311045 |
| 分类号:TU375 |
| 文献标识码:A |
| 基金项目:山西省基础研究计划优秀青年培育项目(202103021222007)；国家自然科学基金面上项目(51978437)；中国博士后科学基金(2021M692862) |
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| Experimental and finite element analysis of seismic performance for novel stepped joint with cantilever segment |
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LI Yun,CHENG Xin,AN Yi,YANG Xu,LU Guoyun,LIU Jianfei
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(College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China)
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| Abstract: |
| Aiming to address the challenge of simultaneously ensuring both level alignment and sufficient seismic performance in the case of wing flange in externally extended cantilever spliced full-bolted connection joint beam, a novel stepped full-bolted connection beam-column joint is proposed. Low-cycle reciprocating loading tests were conducted on cantilever-type joint specimens with two different end-plate connection forms. A detailed analysis of failure modes, hysteresis curves, skeleton curves, bearing capacity, ductility, and energy dissipation capacity of the specimens was carried out to investigate the seismic performance of this type of joint. Furthermore, the influence of the connection form between the thick end-plate and U-shaped buckle on the seismic performance was analyzed. The test results indicate that different connection forms have a minor impact on the elastic segment performance of the joint but a significant impact on the ultimate failure mode of the joint. The stepped joint with a thick end plate exhibits good bearing and deformation performance, while the U-shaped buckle joint shows poor seismic performance. A finite element model was established and validated using the thick end-plate specimen. By changing parameters in the finite element software, the influence of end-plate thickness on the seismic performance of the new joint was explored. It was found that as the end-plate thickness decreases, the initial stiffness, bearing capacity, and energy dissipation capacity of the joint decrease accordingly. |
| Key words: prefabricated steel structure stepped joint quasi-static test seismic performance finite element analysis |
