负载下T形圆钢管外加劲肋加强节点轴向受压承载性能试验研究

黄山山; 白杨; 郭天裕; 孙海林; 祝磊

doi:10.13204/j.gyjzG21013001

负载下T形圆钢管外加劲肋加强节点轴向受压承载性能试验研究

doi: 10.13204/j.gyjzG21013001

黄山山^1,2,3,4,
白杨^1,2,3,4,
郭天裕^1,2,3,4,
孙海林⁵,
祝磊^1,2,3,4, ,

1. 北京未来城市设计高精尖创新中心, 北京 100044;
2. 工程结构与新材料北京市高等学校工程研究中心, 北京 100044;
3. 北京市建筑结构与环境修复功能材料重点实验室, 北京 100044;
4. 北京建筑大学土木与交通工程学院, 北京 100044;
5. 中国建筑设计研究院有限公司, 北京 100044

基金项目:

国家自然基金面上项目(51778035)。

详细信息

作者简介:
黄山山,女,1995年出生,硕士。

通讯作者:
祝磊,男,1980年出生,博士,教授,zhulei@bucea.edu.cn。

计量
- 文章访问数: 73
- HTML全文浏览量: 3
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2021-01-30

Experimental Studies on Axial Compression Capacity of CHS T-Joints Reinforced with External Stiffeners Under Load

HUANG Shanshan^1,2,3,4,
BAI Yang^1,2,3,4,
GUO Tianyu^1,2,3,4,
SUN Hailin⁵,
ZHU Lei^{1,2,3,4
, ,}

1. Beijing Advanced Innovation Center for Future Urban Design, Beijing 100044, China;
2. Beijing Higher Institution Research Center of Structural Engineering and New Materials, Beijing 100044, China;
3. Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation, Beijing 100044, China;
4. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
5. China Architecture Design and Research Group, Beijing 100044, China

摘要

摘要: 为研究负载下T形圆钢管外加劲肋加强节点轴向受压承载性能,根据支管与主管的外径之比β不同(分别为0.25、0.50 和0.73),分成三组进行对比试验。详细介绍了试件尺寸设计、预应力的加载过程、加载制度、持载过程中的焊接工作、破坏形态等。试验出现两种失效模式:节点破坏和平面外倾斜。试验结果表明:当β=0.25时,负载下节点的破坏模式为加劲肋处节点屈服;当β=0.5或0.73时,节点都出现不同程度上的平面外倾斜;焊接加固顺序对负载下T形圆钢管的温度作用变形发展具有重要影响;焊接热作用时,杆件的竖向位移增大,千斤顶力的作用相对减少;焊接冷却后,杆件的竖向位移出现回弹,千斤顶荷载传感器显示的作用力增加,初始荷载对于节点承载性能的影响随β的不同产生不同的影响,当β=0.25时,随着初始荷载的增大,极限承载力出现滞后,结构总位移加大,但承载力的大小没有明显的变化,从250.7 kN提升为250.9 kN;当β=0.5时,随着初始荷载的增大,极限承载力从350.3 kN降低到324.6 kN,降低了7.3%,节点刚度变小;当β=0.73时,由于T3-60的平面外倾斜过大,试验提前停止,但可以看出,随着初始荷载的增大,极限承载力从499.7 kN增大到566.2 kN,增大了13.3%,节点刚度无明显变化。
- 圆钢管 /
- 负载下 /
- 节点加固 /
- 轴向受压 /
- 外加劲肋 /
- T形节点
Abstract: In this paper, the bearing capacity of joints under pre-loading of 3 groups of T-shaped joints reinforced with external stiffeners was investigated. According to the ratio of the diameter of the brace and the chord, it was divided into three groups (β=0.25、0.50 and 0.73) for comparison. The specimen dimension design, the loading process of the pre-loading, the loading system, the welding work during the loading process and the failure mode were introduced in detail. There were two typical failure modes: node failure and out-of-plane tilt. The experimental results showed that when β=0.25, the failure mode of the joint was the yield of the stiffener, and when β=0.5 or 0.73, the joint appeared out-of-plane inclination in different degrees. Therefore, the out-of-plane tilt was the most important failure mode for T-joints under axial load. The welding reinforcement sequence had an important influence on the temperature-induced deformation development of T-shaped circular steel tubes under load. The vertical displacement of the brace increased and the force of the jack decreased when the welding heat was applied, and the vertical displacement of the brace rebounded after the welding cooling, and the force of the jack load sensor increased. The influence of initial load on the bearing capacity of joint was different with different factors. When β=0.25, with the increase of the initial load, the ultimate bearing capacity came later and the total displacement of the structure increased, but the magnitude of the bearing capacity did not change obviously from 250.7 kN to 250.9 kN. When β=0.5, with the increase of initial load, the carrying capacity decreased by 73% from 350 kN to 324.6 kN and joint stiffness also decreased. When the value was 0.73, due to the large out-plane inclination of T3-60, the experiment was stopped ahead of time, but it could be seen that with the increase of the initial load, the ultimate bearing capacity increased by 13.3% from 499.7 kN to 566.2 kN, and the stiffness of the joint did not change obviously.
- circular hollow section /
- under load /
- joint reinforcement /
- axial compression /
- external stiffener /
- T-joint

HTML全文

参考文献(21)

[1]	蒋立. 钢结构负载下焊接加固压弯构件研究[D]. 重庆:重庆大学, 2015.
[2]	王元清,蒋立,戴国欣,等.负载下焊接加固钢结构压弯构件的设计方法建议[J].工业建筑, 2017, 47(2): 13-17.
[3]	祝瑞祥,王元清,戴国欣,等. 负载下钢结构构件加固技术及其应用研究综述[C]//第十一届全国建筑物鉴定与加固改造学术交流会议论文集. 北京: 2012: 188-194.
[4]	MARZOUK H, MOHAN S. Strengthening of wide-flange columns under load [J]. Canadian Journal of Civil Engineering, 1990,17(5): 835-843.
[5]	BROWN J H. Reinforcing loaded steel compression members [J]. AISC Engineering Journal, 1988,25(4): 161-168.
[6]	CANNON L. Strength and behavior of beams strengthened while under load [D]. Halifax: Dalhousie University, 2007: 71-93.
[7]	LIU Y, CANNON L. Experimental behavior and strength of steel beams strengthened while under load [J]. Journal of Constructional Steel Research, 2009, 65(6): 1346-1354.
[8]	郭寓岷, 陈增光. 高荷载下的焊接技术[J]. 钢结构, 1996, 11(1):49-54.
[9]	张涛, 王元清, 石永久, 等. 单层轻钢厂房刚架梁和节点域的加固设计与分析[J]. 四川建筑科学研究, 2006, 32(3): 49-52.
[10]	廖新军, 王元清, 石永久, 等. 荷载变化引起的门式刚架轻钢结构厂房加固设计[J]. 工业建筑, 2005, 35(2): 93-95.
[11]	梁柱. 某石化厂钢结构框架的加固设计[J]. 广东土木与建筑, 2004(1):63-64.
[12]	凌程建. 工业厂房加固方法研究与实际应用[D]. 成都: 四川大学, 2006.
[13]	王德峰, 邹永春, 肖逸青. 某钢结构多层厂房加固技术的应用[J]. 工业建筑, 2005, 35(增刊): 912-913.
[14]	李克让, 罗严. 轻钢框架结构加固改造的设计与实践[J]. 钢结构, 2008,23(1): 32-34.
[15]	冯兴红, 陈道政, 王灿. 浅谈房屋加固方法在钢结构厂房中的应用[J]. 金陵科技学院学报, 2011, 27(1): 29-33.
[16]	苏庆田, 张其林, 但泽义, 等. 宝钢二号高炉炉体框架的加固设计[J]. 建筑结构学报, 2003, 24(5): 31-35.
[17]	苏庆田, 张其林, 但泽义. 宝钢二号高炉炉体框架的加固验算[J]. 钢结构, 2002, 17(6): 54-56.
[18]	龚顺风, 程江敏, 程鹏. 加固钢柱的非线性屈曲性能研究[J]. 钢结构, 2011, 26(11): 15-19.
[19]	张坚, 孙春方. 负荷状态钢结构焊接研究[J]. 特种结构, 2005(4): 38-40.
[20]	牛犇, 刘晓珂, 陈志华, 等. 负载下焊接加固过程对钢梁及钢支撑受力性能的影响研究[J]. 建筑结构学报, 2014, 35(7): 87-95.
[21]	赵熙元,陈伟,谢国昂. 钢管结构设计[M]. 北京:中国建筑工业出版社,2011.