吉林大学学报(工学版) ›› 2025, Vol. 55 ›› Issue (1): 283-296.doi: 10.13229/j.cnki.jdxbgxb.20240006

• 交通运输工程·土木工程 • 上一篇    下一篇

预制钢管混凝土芯柱新型法兰连接试验与有限元分析

杨维国1,2(),苏英楠1,2,邹剑强3,马若辰3,张庆亮3   

  1. 1.北京交通大学 土木工程学院，北京 100091
    2.北京交通大学 结构风工程与城市风环境北京市重点实验室，北京 100091
    3.中国航空规划设计研究总院有限公司，北京 100120
  • 收稿日期:2024-01-02 出版日期:2025-01-01 发布日期:2025-03-28
  • 作者简介:杨维国（1973-），男，教授，博士.研究方向：结构抗震. E-mail： wgyang1@bjtu.edu.cn
  • 基金资助:
    国家重点研发计划项目(2019YFC1521000)

Experiment and finite element analysis on new type of flange connection for precast concrete-filled steel tube core column

Wei-guo YANG1,2(),Ying-nan SU1,2,Jian-qiang ZOU3,Ruo-chen MA3,Qing-liang ZHANG3   

  1. 1.College of Civil Engineering，Beijing Jiaotong University，Beijing 100091，China
    2.Beijing's Key Laboratory of Structural Wind Engineering and Urban Wind Environment，Beijing Jiaotong University，Beijing 100091，China
    3.China Aviation Planning and Design Institute（Group） Co. ，Ltd. ，Beijing 100120，China
  • Received:2024-01-02 Online:2025-01-01 Published:2025-03-28

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摘要：

为了在多层预制叠合柱结构中实现柱-柱快速连接，对截面直径不大于400 mm的小截面钢管混凝土芯柱，提出了一种采用法兰盘和高强螺栓连接的新型法兰连接方法。该特点是在常规法兰中间设置过渡板并涂抹粘钢胶，通过调整过渡板和粘钢胶可调节预制柱长度误差、法兰盘倾斜误差和钢管内混凝土的凹凸误差。为了验证这种新型法兰连接受力的可靠性，设计4个试件进行试验，分别模拟无接头、正常连接、钢管内混凝土下凹、管内混凝土下凹且法兰倾斜等4种状况，同时考察各种施工不利因素对法兰轴向承载力的影响。通过轴向受拉、轴向受压试验和有限元分析获得试件的轴向承载力、破坏模式，采用有限元数值模拟方法对管内混凝土不平且安装倾斜的法兰连接钢管混凝土芯柱进行参数化分析。研究结果表明：该预制钢管混凝土芯柱法兰连接刚度大、承载力高、延性好，节点受力可靠；随着钢管壁厚的增加，连接并未发生破坏，该新型法兰连接受压承载力具有相当大的安全余量；钢管内混凝土凹凸不平对芯柱初始刚度和峰值承载力影响不大；法兰盘过大倾斜时将降低芯柱初始刚度和峰值承载力，施工时应引起注意。

Abstract:

In order to achieve rapid column-to-column connection in multi-story precast composite column structures， this study proposes a new flange connection method using flange plates and high-strength bolts for small-section steel tubular concrete core columns with a diameter not exceeding 400 mm. The method involves adjusting the transition plate and applying adhesive steel glue to compensate for the precast column length error， flange plate inclination error， and irregularities in the concrete inside the steel tube. The core concrete-filled steel tubes columns can bear vertical loads during construction， and the flange connection is simple， convenient， and has high compression stiffness and load-bearing capacity. To verify the reliability of this new flange connection， four specimens were designed in this study， representing four conditions： without connection section， normal connection， concave concrete inside the steel tube， and concave concrete inside the tube with inclined flanges. The influence of various adverse construction factors on the axial load-bearing capacity of the flange was examined. Axial tensile and compression tests and finite element analysis were conducted to obtain the axial load-bearing capacity and failure mode of the specimens. Parametric analysis of flange-connected steel tubular concrete core columns with uneven and inclined concrete inside the tube was performed using finite element numerical simulation. The research results demonstrate that the proposed precast steel tubular concrete core column with flange connection has high stiffness， load-bearing capacity， and ductility， ensuring reliable force distribution at the connection points. Increasing the steel tube wall thickness does not lead to connection failure， indicating a significant safety margin for the compression load-bearing capacity of this new flange connection. The irregularities in the concrete inside the steel tube have minimal effect on the initial stiffness and peak load-bearing capacity of the core column. However， excessive inclination of the flange plate reduces the initial stiffness and peak load-bearing capacity of the core column， which should be considered during construction.

中图分类号: 

  • TU273
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