覆板和加劲板加强的Q460C方钢管X型节点试验
PDF下载 (257)范余哲,初汉增,王万祯,黄益洲.覆板和加劲板加强的Q460C方钢管X型节点试验[J].宁波大学学报(理工版),2023,36(5):58-68.DOI:10.20098/j.cnki.1001-5132.2023.0238
FAN Yuzhe,CHU Hanzeng,WANG Wanzhen,HUANG Yizhou.Tests on X-joints of Q460C steel square tubes strengthened with cover plate and ribs[J].Journal of Ningbo University(Natural Science & Engineering Edition),2023,36(5):58-68.DOI:10.20098/j.cnki.1001-5132.2023.0238
| Title: | Tests on X-joints of Q460C steel square tubes strengthened with cover plate and ribs |
| 作者: | 范余哲, 初汉增, 王万祯, 黄益洲 |
| Author(s): | FAN Yuzhe, CHU Hanzeng, WANG Wanzhen, HUANG Yizhou |
| 关键词: | Q460C方钢管; X型节点; 覆板; 加劲板; 试验; 承载力 |
| Keywords: | Q460C steel square tube; X-joint; covered plates; ribs; test; bearing capacity |
| 分类号: | TU391 |
| DOI: | 10.20098/j.cnki.1001-5132.2023.0238 |
| 文献标识码: | A |
| 摘要: | 对覆板加强主管和支主管间设置加劲板的Q460C方钢管X型节点与常规节点进行了主管轴压静力加载试验, 考察了覆板和加劲板对X型节点受力性能的影响, 获得了节点的破坏模式、荷载—位移曲线、极限承载力、极限位移、刚度、延性、节点区应变分布演化等力学性能参数. 试验结果显示: 覆板和加劲板加强的Q460C方钢管X型节点的主要破坏模式为上支管根部附近覆板上半区向外鼓曲, 下半区向内凹陷; 覆板和主管连接处上半区焊缝开裂, 覆板脱落; 与上支管相连的加劲板根部焊缝开裂, 上支管和覆板凸起; 下支管根部的覆板和支管壁凹陷. 覆板和加劲板构造明显提高了Q460C方钢管X型节点的承载力、变形能力、延性和刚度, 加强节点的极限承载力、极限变形和延性较常规节点分别提高51.9%~105.3%、19.3%~38.2%和0~34.7%. |
| Abstract: | Static loading tests under axial compression on chord are performed on X-joints of Q460C steel square tubes with cover plate strengthening chord and ribs between braces and chord. The effects of cover plate and ribs on the mechanical properties of X-joints are investigated, and the mechanical performance parameters are obtained for failure modes, load-displacement curves, ultimate bearing capacity, ultimate displacement, stiffness, ductility and strain distribution evolution in the panel zone, and so on. The test results show that the failure modes of the X-joints strengthened with cover plate and ribs are the buckling outward to and inward from the upper half and the lower half of the cover plate at the upper brace root. The weld between cover plate and the chord in the upper half of the connection zone crack, and the covered plates fall off. The weld at the root of the stiffening plate is connected with the upper brace crack, and the upper brace and the cover plate bulge. The cover plate at the root of the lower brace and the brace wall are found to be concave. The bearing capacity, deformation, ductility and stiffness of Q460C square steel tube X-joints are obviously improved by cover plate and ribs. The ultimate bearing capacity, ultimate deformation and ductility of the reinforced joints are 51.9%~105.3%, 19.3%~38.2% and 0~34.7% higher than those indices of traditional joint respectively. |
| 参考文献 /References: | [1] 周春波. 新型加强X型方钢管节点平面内受弯滞回性能研究[D]. 徐州: 中国矿业大学, 2017. [2] Zhao B D, Li F L, Liu C Q, et al. Hysteretic behavior of CHS X-joints under in-plane bending moment[J]. Structures, 2022, 43:1790-1806. [3] 常鸿飞, 李照伟, 左文康, 等. 槽型套管加强方钢管X形节点平面内受弯性能试验[J/OL]. 工程力学, 2022 [2023-02-10]. https://doi.org/10.6052/j.issn.1000-4750.2022.05.0407. [4] 刘帅鹏. 槽型套管加强X型方钢管节点平面外受弯性能研究[D]. 徐州: 中国矿业大学, 2020. [5] 王峰, 史庆轩, 王朋, 等. 圆钢管混凝土X型节点轴压承载力研究[J]. 钢结构, 2017, 32(7): 38-43. [6] Zhao B D, Zheng J Y, Liu C Q, et al. Study on the brace axial force-local deformation behavior of unstiffened CHS X-joints[J]. Archive of Applied Mechanics, 2021, 91(1):205-221. [7] Gao C Z, Zhang D C, Cui M C, et al. Bearing capacity test and calculation theory on CHS X-Joints stiffened with joint-plates[J]. KSCE Journal of Civil Engineering, 2022, 26(2):848-864. [8] 黎冠楠. 方钢管混凝土压弯构件承载力可靠性研究及灵敏度分析[D]. 成都: 成都理工大学, 2019. [9] 侯蓓蓓. PBL加劲型矩形钢管混凝土受拉X型节点有效分布宽度研究[D]. 西安: 长安大学, 2018. [10] 尹青青. 方钢管混凝土短柱轴压力学性能分析及工程应用研究[D]. 淮南: 安徽理工大学, 2022. [11] 刘艳, 薛旭辉, 张红光, 等. X形方钢管节点平面内抗弯性能试验研究[J]. 中国科技论文, 2018, 13(13):1505-1510. [12] Zhao B D, Shao Z H, Liu C Q, et al. Influence of brace- to-chord angle on the seismic behavior of circular hollow section X-joints under in-plane bending[J]. Engineering Structures, 2022, 264:114419. [13] 江锐, 江力强. 曲线CHS主钢管X形节点平面内受弯性能研究[J]. 建筑钢结构进展, 2019, 21(1):72-79. [14] 倪威康, 王万祯, 贾真, 等. 变截面方钢管轻骨料混凝土边柱-钢箱梁折线隔板贯通节点破坏机理和承载力研究[J]. 工程力学, 2019, 36(10):122-133. [15] 赵熙元, 陈东伟, 谢国昂. 钢管结构设计[M]. 北京: 中国建筑工业出版社, 2011. [16] GB/T 228.1—2021. 金属材料 拉伸试验 第1部分: 室温试验方法[S]. [17] GB/T 2651—2008. 焊接接头拉伸试验方法[S]. [18] 成丽娜. Q460高强钢材焊接空心球节点双向受力性能研究[D]. 北京: 北京交通大学, 2019. |
| 备注/Memo: | 收稿日期: 2023－02－23. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 浙江省基础公益技术研究计划（LGF18E080007）. 第一作者: 范余哲（1998－）, 男, 浙江宁波人, 在读硕士研究生, 主要研究方向: 钢结构和组合结构. E-mail: fanyuzhe123@qq.com 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/*通信作者: 初汉增（1979－）, 男, 山东莱芜人, 讲师, 主要研究方向: 钢结构. E-mail: chuhanzeng@nbu.edu.cn |
