梁端约束H型钢梁-柱节点的火灾后力学性能试验研究

刘链波; 王新堂; 周明; 朱杰; 张家亮

doi:10.13204/j.gyjzG22030702

梁端约束H型钢梁-柱节点的火灾后力学性能试验研究

doi: 10.13204/j.gyjzG22030702

1. 宁波大学科学技术学院建筑工程学院, 浙江宁波 315300;
2. 宁波工程学院建筑与交通工程学院, 浙江宁波 315210

基金项目:

浙江省住房和城乡建设厅项目(2020K147)

浙江省基础公益研究计划项目(LGF21E080005)

详细信息

作者简介:
刘链波,男,1988年出生,硕士,讲师。电子信箱:452812178@qq.com

计量
- 文章访问数: 73
- HTML全文浏览量: 14
- PDF下载量: 0
- 被引次数: 0
出版历程
- 收稿日期: 2022-03-07
- 网络出版日期: 2023-02-06

Experimental Research on Post-Fire Mechanical Properties of H-Steel Beam to Column Connection with Restraint at Beam Ends

1. Faculty of Architectural Engineering, College of Science & Technology Ningbo University, Ningbo 315300, China;
2. School of Civil Transportation Engineering, Ningbo University of Technology, Ningbo 315210, China

摘要

摘要: 通过对6组火灾后梁端约束H型钢梁-柱节点(JD2-2未经过受火试验)进行拟静力试验,得到节点滞回曲线及骨架曲线,分析了试件的承载力、刚度退化、延性及耗能能力的变化情况。研究结果表明:两端外伸端板连接节点具有良好的变形及耗能能力,一端外伸端板连接节点耗能能力较弱,适用于非抗震区;火灾作用使节点的强度、刚度及延性均有所下降,对耗能能力无影响;增加端板厚度可以提高火灾后节点的承载力和耗能能力,但对改善火灾后节点的延性作用不大;梁端设置加劲肋和端板下部设置抗剪支托可以提高火灾后节点的延性及耗能能力,但对火灾后节点承载力的提高不明显。
- H型钢梁-柱节点 /
- 端板连接 /
- 拟静力试验 /
- 耗能能力 /
- 承载力
Abstract: The quasi-static test was carried out on 6 sets of H-steel beam to column connections with restraint at beam ends (JD2-2 had not passed the fire test), hysteretic curves and skeleton curves of joints were obtained, the bearing capacity, stiffness degradation, ductility and energy dissipation capacity of specimens were analyzed. The results showed that two-end extended end-plate connection joint had good deformation and energy dissipation capacity, the energy dissipation capacity of the one-end extended end-plate connection joint was weak and applicable to non-seismic zone; the strength, stiffness and ductility of joint were reduced by fire, and there was no effect on the energy dissipation capacity; Increasing the end-plate thickness could improve the bearing capacity and energy dissipation capacity of the joint after fire, it had little effect on improving the ductility of joint after fire; the ductility and energy dissipation capacity of the joint could be improved by setting stiffeners at beam ends and shear brackets at the bottom of the end plate, but the bearing capacity of the joint was not improved obviously after fire.
- beam-column joint of H-section steel /
- end-plate connection /
- quasi-static test /
- energy dissipation capacity /
- bearing capacity

HTML全文

参考文献(10)

[1]	李俊华, 马超, 陈建华, 等.火灾后型钢混凝土柱-钢梁节点抗震性能试验研究[J].防灾减灾工程学报, 2015, 35(1):51-56.
[2]	薛景宏, 董孝曜, 戚兴博, 等.矩形钢管混凝土翼缘梁与柱节点的火灾滞回性能[J].石河子大学学报, 2019, 37(2):170-175.
[3]	金秀莲, 周明, 王新堂, 等.梁端约束H形钢梁-柱节点的火灾响应研究[J].空间结构, 2019, 25(3):72-79.
[4]	李国华, 谢龙, 徐艳龙.火灾后SRC柱-RC梁节点滞回性能试验研究[J].建筑结构, 2016, 46(9):75-78.
[5]	李侥婷, 李国强, 楼国彪, 等.考虑约束组合梁与组合节点相互作用的结构火灾反应分析[J].河北科技大学学报, 2011, 32(5):500-506.
[6]	LAWSON R M.Behavior of steel beam-to-column connections in fire[J].Structure Engineering, 1990, 68(14):263-271.
[7]	QIAN Z H, TAN K H, BURGESS I W.Behavior of steel beam-to-column joints at elevated temperature:experimental investigation[J].Journal of Structural Engineering, ASCE, 2008, 134(5):713-726.
[8]	ELSAWAF S, WANG Y C.Behaviour of restrained structyral subassem-blies of steel beam to CFT column in fire during cooling stage[J].Engineering Structures, 2013, 46:471-492.
[9]	QIANG X H, BIJLAARD F S K, KOLSTEIN H, et al.Behaviour of beam-to-column high strength steel endplate connections under fire conditions:part Ⅰ:experimental study[J].Engineering Structures, 2014, 64:23-38.
[10]	周起敬.钢与混凝土组合结构设计施工手册[M].北京:中国建筑工业出版社, 1991:246-249.