[1]聂少锋,刘叶清,崔建军,等.圆钢管约束型钢混凝土柱-RC梁节点轴压性能[J].长安大学学报(自然科学版),2025,45(3):65-78.[doi:10.19721/j.cnki.1671-8879.2025.03.006]
 NIE Shao-feng,LIU Ye-qing,CUI Jian-jun,et al.Axial compressive behavior of circular tubed steel reinforced concrete column-RC beam joint[J].Journal of Chang’an University (Natural Science Edition),2025,45(3):65-78.[doi:10.19721/j.cnki.1671-8879.2025.03.006]
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圆钢管约束型钢混凝土柱-RC梁节点轴压性能()
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长安大学学报(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
第45卷
期数:
2025年3期
页码:
65-78
栏目:
桥梁与隧道工程
出版日期:
2025-05-31

文章信息/Info

Title:
Axial compressive behavior of circular tubed steel reinforced concrete column-RC beam joint
文章编号:
1671-8879(2025)03-0065-14
作者:
聂少锋1刘叶清1崔建军2温博3蒋鑫1冉博1
(1. 长安大学 建筑工程学院,陕西 西安 710061; 2. 长安大学 土地工程学院,陕西 西安 710054; 3. 中国煤碳科工集团 北京华宇工程有限公司,陕西 西安 710061)
Author(s):
NIE Shao-feng1 LIU Ye-qing1 CUI Jian-jun2 WEN Bo3 JIANG Xin1 RAN Bo1
(1. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China; 2. School of Land Engineering, Chang'an University, Xi'an 710054, Shaanxi, China; 3. Beijing Huayu Engineering Co. Ltd., China Coal Technology and Engineering Group, Xi'an 710061, Shaanxi, China)
关键词:
桥梁工程 圆钢管约束型钢混凝土柱 轴压性能 有限元分析 RC环梁节点 钢管开孔节点
Keywords:
bridge engineering circular tubed steel reinforced concrete column axial compressive behavior finite element analysis joint of RC ring beam joint of steel tube with opening holes
分类号:
U443.22
DOI:
10.19721/j.cnki.1671-8879.2025.03.006
文献标志码:
A
摘要:
分别对钢管开孔式和钢筋混凝土(RC)环梁式圆钢管约束型钢混凝土柱-RC梁节点的轴压性能进行了试验研究,得到了各试件的轴压破坏特征、最大承载力、荷载-位移曲线等; 利用ABAQUS对试件的轴压性能进行了数值分析,并对比了试验与有限元分析结果; 在验证有限元模型正确性的基础上,详细分析了型钢含钢率、钢管径厚比、钢管开孔节点开孔边距比和开孔率、RC环梁节点环梁配筋率和环梁宽度等参数对节点轴压性能的影响。研究结果表明:试件柱体发生剪切或鼓曲破坏,节点区基本完好,RC环梁和钢管开孔节点的轴压性能良好,节点区均受到保护和约束作用; 试验与有限元分析所得试件刚度、最大荷载和荷载-轴向位移曲线基本吻合,有限元极限承载力与试验结果相差在5%以内,表明有限元模型具有良好的计算精度,可用于参数分析; 试件最大荷载和延性随型钢含钢率的增加和钢管径厚比的减小得到提升,含钢率建议取4%~10%; 随着RC环梁宽度的增加,试件的最大荷载基本未发生变化,但延性有一定提升,RC环梁宽度大于RC梁宽时,能够保证节点核心区具有良好的性能; 钢管开孔节点开孔边距比改变时,试件的最大荷载未发生明显变化,但当开孔边距比从11.1%增至15.0%时,试件后期承载力明显提升,因此,开孔边距比应大于15.0%; 随着开孔率的减小,试件的最大荷载及延性均略有提升,同时为避免试件在钢管处破坏,开孔率应小于50%。
Abstract:
Experimental studies were conducted on the axial compressive behaviors of circular tubed steel reinforced concrete column-reinforced concrete(RC)beam joints of steel tube with opening holes and RC ring beam, respectively, and the compression failure characteristics, maximum bearing capacities, and load-displacement curves of specimens were obtained. Numerical analysis was carried out on axial compressive behaviors of specimens through ABAQUS, and the experimental results were compared to finite element analysis(FEA)results. On the basis of verifying the correctness of the finite element model, the influences of steel content, diameter-to-thickness ratio of steel tube, hole margin ratio and opening hole ratio of joint of steel tube with opening holes, as well as rebar ratio and width of joint of RC ring beam on the axial compressive behaviors of joints were analyzed in detail. The research results show that the shear failure or buckling failure occurs on the column of specimen, and the joint region is intact. The RC ring beam and joint of steel tube with opening holes have great compressive behavior. Joint regions are protected and constrained. The stiffnesses, maximum loads, and load-axial displacement curves obtained from experiment and FEA are basically consistent. The difference in the ultimate bearing capacity between FEA and experiment is within 5%, indicating the finite element model has high calculation accuracy and suitability for parametric analysis. The maximum load and ductility of specimen improve with the increase in the steel content and the decrease in the diameter-to-thickness ratio of steel tube. The steel content is proposed between 4%-10%. As the width of RC ring beam increases, the maximum load of specimen remains nearly constant, while its ductility improves to a certain extent. When the width of RC ring beam is larger than that of RC beam, the joint core region has good behavior. When the hole margin ratio of joint of steel tube with opening holes specimen alters, the maximum load of specimen does not show significant change. However, as the hole margin ratio increases from 11.1% to 15.0%, the post bearing capacity of specimen improves notably. Therefore, the hole margin ratio should be greater than 15.0%. As the opening hole ratio decreases, the maximum load and ductility of specimen both slightly improve. Additionally, to prevent the failure at the steel tube, the opening hole ratio should be less than 50%.5 tabs, 16 figs, 30 refs.

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备注/Memo

备注/Memo:
收稿日期:2024-11-05
基金项目:国家自然科学基金项目(51408052); 陕西省重点研发计划项目(2018SF-354); 陕西省青年科技新星计划项目(2016KJXX-51)
作者简介:聂少锋(1981-),男,河北石家庄人,教授,博士研究生导师,E-mail:niesf@chd.edu.cn。
通信作者:崔建军(1974-),男,山东烟台人,副教授,工学博士,E-mail:stonecui@chd.edu.cn。
更新日期/Last Update: 2025-05-30