双肢冷弯C型钢蒙古包刚架稳定性试验

陈明; 许晶博; 武志远; 李补拴

doi:10.13204/j.gyjzG21072302

双肢冷弯C型钢蒙古包刚架稳定性试验

doi: 10.13204/j.gyjzG21072302

内蒙古科技大学土木工程学院, 内蒙古包头 014010

基金项目:

国家自然科学基金项目（51768055）；内蒙古自然科学基金项目（2021MS05061）。

详细信息

作者简介:
陈明,男,1978年出生,博士,硕士生导师。电子信箱:cmlx-1978@163.com

计量
- 文章访问数: 23
- HTML全文浏览量: 1
- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2021-07-23
- 网络出版日期: 2023-12-18

Stability Test on Double-Limb Cold-Formed C-Shaped Steel Yurt Rigid Frames

College of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

摘要

摘要: 基于草原地区冷弯型钢蒙古包研究的基础，以其一榀平面刚架为研究对象。对5榀刚架进行稳定性试验及有限元模拟研究，分析其破坏模态、承载力、柱顶侧移、屈服机制等，探究斜梁坡度及高跨比对刚架稳定性的影响。结果表明：刚架破坏主要是以梁上、下端C型钢局部屈曲导致整体平面内失稳；增大斜梁坡度和减小高跨比均能提高刚架承载力，提高刚架整体稳定性；刚架柱顶侧移随着斜梁坡度增加而增大，高跨比对柱顶侧移影响较小；刚架斜梁坡度和高跨比的增大均会使刚架柱顶部屈曲破坏提前，改变刚架整体破坏模态；设计时应综合考虑斜梁坡度对柱顶侧移和承载力的影响，合理增加刚架柱刚度，可防止柱顶侧移过大导致刚架失稳。最后采用有限元与试验进行对比并相互验证，为此类结构深入研究提供参考。
- 冷弯C型钢 /
- 刚架 /
- 静力试验 /
- 稳定性
Abstract: Based on the study of cold-formed steel yurts in grassland areas, a one-bay planar rigid frame was used as the research object. Stability tests and finite element simulations were carried out on a 5-bay rigid frame to analyze its damage modalities, bearing capacity, column top lateral displacement and yielding mechanism, etc., and to investigate the effects of inclined beam slope and depth-span ratio on the stability of the rigid frame. The results showed that the damage of rigid frame was mainly caused by the local buckling of C-beam at the top and bottom of the beam, which led to the overall in-plane instability; increasing the slope of inclined beam and decreasing the depth-span ratio could advance the bearing capacity and the overall stability of rigid frame; the lateral shift of the top of rigid frame column increased with the raise of slope of slanted beam, but the depth-span ratio had less effect on the lateral shift of the top of column; the increase of slope of inclined beam and depth-span ratio would advance the buckling damage of the top of rigid frame column and change the overall damage modality of rigid frame; the design should consider the influence of slope of inclined beam on column top lateral shift and bearing capacity, and increase the rigidity of rigid hing column reasonably to prevent the column top lateral shift from causing the instability of rigid frame;comparison and cross-validation between finite elements and tests were used to provide a reference for further research into such structures.
- cold-formed C-shape steel /
- rigid frame /
- static test /
- stability

HTML全文

参考文献(14)

[1]	陈曦. 装配式钢结构住宅体系的发展与应用[J]. 住宅与房地产, 2016(36):20.
[2]	CHEN X, BLUM H B, ROY K, et al. Cold-formed steel portal frame moment-resisting joints:Behaviour, capacity and design[J/OL]. Journal of Constructional Steel Research, 2021, 183(21)[2021-07-05].https://doi.org/10.1016/j.jcsr.2021.106718.
[3]	LIM J B P, NETHERCOT D A. Design and development of a general cold-formed steel portal framing system[J]. The Structural Engineer, 2002, 80(21):31-39.
[4]	BAIGENT A H, HANCOCK G J. The behavior of portal frames composed of cold-formed members[R]. 1978.
[5]	RINCHEN, RASMUSSEN K, ZHANG H. Design of cold-formed steel single C-section portal frames[J/OL]. Journal of Constructional Steel Research, 2019, 162(11)[2020-01-06].https://doi.org/10.1016/j.jcsr.2019.105722.
[6]	OZTURK F,PUL S. Experimental and numerical study on a full scale apex connection of cold-formed steel portal frames[J]. Thin-Walled Structures, 2015(94):79-88.
[7]	王文峰, 王海忠. 山形门式刚架的整体稳定分析[J]. 工程建设与设计, 2006(2):12-15.
[8]	王文峰. 考虑均布荷载作用下拱效应的山形门式刚架整体稳定[D]. 北京:北京工业大学, 2006.
[9]	段熙宾,刘曹宇. 单跨等截面柱门式刚架结构柱计算长度系数研究[J]. 结构工程师, 2020, 36(4):192-199.
[10]	吕辉勇. 轻型门式刚架平面内稳定性能及空间性能分析[D]. 兰州:兰州理工大学, 2006.
[11]	陈明,马晓飞.带垫板的双肢冷弯C型钢框架抗震性能研究[J].工程力学,2017,34(2):111-119.
[12]	贾文腾. 装配式冷弯C型钢蒙古包设计与受力性能研究[D]. 包头:内蒙古科技大学, 2019.
[13]	邵斐璠. 冷弯型钢蒙古包结构低周往复加载受力性能研究[D]. 包头:内蒙古科技大学, 2020.
[14]	中国国家标准化管理委员会.金属材料拉伸试验第1部分:室温试验方法:GB/T 228.1-2010[S]. 北京:中国标准出版社, 2010.