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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

42卷

期数:

2025年03期

页码:

68-79

栏目:

建筑结构

出版日期:

2025-05-30

文章信息/Info

Title:

Study on seismic behavior of end plate joint of square concrete-filled steel tube column and steel beam with U-shaped parts

文章编号:

1673-2049(2025)03-0068-12

作者:

胡佳堤¹,聂少锋¹,蒋 鑫¹,姚欣梅¹,张 犇²,王俊凯³

(1. 长安大学 建筑工程学院,陕西 西安 710061; 2. 奥意建筑工程设计有限公司,广东 深圳 518028; 3. 陕西正方建筑检测有限责任公司,陕西 西安 710061)

Author(s):

HU Jiadi¹, NIE Shaofeng¹, JIANG Xin¹, YAO Xinmei¹, ZHANG Ben², WANG Junkai³

(1. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaannxi, China; 2. A+E Design Co., Ltd., Shenzhen 518028, Guangdong, China; 3. Shaanxi square building testing Co., Ltd., Xi'an 710061, Shaannxi, China)

关键词:

方钢管混凝土柱;  U形件;  端板连接;  抗震性能;  数值分析

Keywords:

square concrete-filled steel tube column;  U-shaped part;  end plate joint;  seismic behavior;  numerical analysis

分类号:

TU311

DOI:

10.19815/j.jace.2024.05017

文献标志码:

A

摘要:

对带U形件的方钢管混凝土柱-钢梁端板连接节点的抗震性能进行了数值研究; 在验证有限元模型正确性的基础上,研究了U形件翼缘高度、腹板宽度、中部断开长度和梁柱线刚度比对该节点破坏模式、滞回性能、骨架曲线等的影响。结果表明:该节点滞回曲线饱满,具有良好的抗震性能; U形件嵌入柱内混凝土并在U形件中部设置加劲肋起到了保护核心区混凝土和塑性铰外移远离节点域的作用,满足“强节点,弱构件”的抗震设计原则; U形件腹板宽度由0.58a增大至a(a为柱边长)时,节点初始转动刚度降低26.37%,延性系数降低62.86%,建议U形件腹板宽度取0.58a～0.75a; U形件中部断开长度由0增加到0.3h(h为梁高)时,节点的承载力降低不超过1%,建议断开长度不超过0.3h; 梁柱线刚度比对节点抗震性能影响较大,梁柱线刚度比由0.255增加到0.549时,试件的最大弯矩增大了72%,节点初始转动刚度增加了40%; 轴压比由0.30增大到0.90时,试件最大弯矩减小4.1%,节点延性系数降低4.7%,建议轴压比限值为0.7。

Abstract:

The seismic behavior of concrete-filled square steel tube(CFST)column and steel beam end-plate joints with U-shaped parts was numerically studied. On the basis of verifying the correctness of finite element model, the influences of the height of flange, the width of web, the middle breaking length of U-shaped part and the linear stiffness ratio of beam-column on the failure mode, hysteresis performance and skeleton curve of the joint were studied. The results show that the joint exhibits satisfied seismic behavior with plump hysteresis curve. The U-shaped part is embedded in concrete in column and the stiffening rib is set in the middle of U-shaped part to protect concrete in the core area and plastic hinge moving away from the joint, which meets the seismic design principle of “strong node and weak member”. When the width of web of U-shaped parts is increased from 0.58a to a(a is column side length), the initial rotational stiffness of joint is reduced by 26.37%, and the ductility coefficient is reduced by 62.86%. It is recommended that the web width of U-shaped parts should be 0.58a-0.75a. When the breaking length in the middle of U-shaped part is increased from 0 to 0.3h(h is the height of beam), the bearing capacity of joint is reduced by no more than 1%, and it is recommended that the breaking length should not exceed 0.3h. The beam-column linear stiffness ratio has a great influence on the seismic performance of joint. When the beam-column linear stiffness ratio increases from 0.255 to 0.549, the maximum bending moment of the specimen increases by 72% and the initial rotational stiffness of joint increases by 40%. When the axial compression ratio increases from 0.30 to 0.90, the maximum bending moment of specimen decreases by 4.1%, and the ductility coefficient of joint decreases by 4.7%. The recommended axial compression ratio limit is 0.7.

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相似文献/References:

[1]徐 嫚,梁思雨,张力滨,等.方钢管混凝土柱-钢梁半刚性节点参数分析[J].建筑科学与工程学报,2017,34(04):72.
　XU Man,LIANG Si-yu,ZHANG Li-bin,et al.Parameter Analysis on Concrete-filled Square Steel Tubular Column-steel Beam Semi-rigid Connection[J].Journal of Architecture and Civil Engineering,2017,34(03):72.
[2]周天华,聂少锋,郭新艳.削弱梁端的方钢管混凝土柱-钢梁框架结构静力弹塑性分析[J].建筑科学与工程学报,2009,26(01):84.
　ZHOU Tian-hua,NIE Shao-feng,GUO Xin-yan.Static Elasto-plastic Analysis of Concrete-filled Square Tubular Column to Steel Beam Frame Structure with Reduced Beam Section[J].Journal of Architecture and Civil Engineering,2009,26(03):84.
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[4]马腾飞,陈志华,杜颜胜.L形方钢管再生混凝土组合异形柱偏压承载力计算方法[J].建筑科学与工程学报,2025,42(01):82.[doi:10.19815/j.jace.2022.07095]
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备注/Memo

备注/Memo:

收稿日期:2024-05-09
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(2021SF-519,2024GX-YBXM-374)
通信作者:姚欣梅(1992-),女,工学博士,讲师,E-mail:yaoxinmei1216@163.com。
Author resume: YAO Xinmei(1992-), female, PhD, assistant professor, E-mail: yaoxinmei1216@163.com.

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更新日期/Last Update: 2025-06-01