外包陶粒混凝土T形钢短柱轴心受压试验研究

刘学春; 段嘉琪

doi:10.13204/j.gyjzG20031020

外包陶粒混凝土T形钢短柱轴心受压试验研究

doi: 10.13204/j.gyjzG20031020

北京工业大学, 北京市高层和大跨度预应力钢结构工程技术研究中心, 北京 100124

基金项目:

国家自然科学基金项目（51978013）；十三五重大专项（2016YFC0701100）。

详细信息

作者简介:
刘学春,男,1974年出生,工学博士,教授。电子信箱:liuxuechun@bjut.edu.cn

计量
- 文章访问数: 56
- HTML全文浏览量: 3
- PDF下载量: 0
- 被引次数: 0
出版历程
- 收稿日期: 2020-03-10
- 网络出版日期: 2021-09-16
- 刊出日期: 2021-09-16

EXPERIMENTAL RESEARCH ON SHORT T-SHAPED STEEL COLUMN WRAPPED WITH CERAMSITE CONCRETE UNDER AXIAL COMPRESSION

Beijing Engineering Research Center of High-Rise and Large-Span Pre-Stressed Steel Structures, Beijing University of Technology, Beijing 100124, China

摘要

摘要: 提出一种外包陶粒混凝土T形钢柱。以保温隔热、抗渗性良好的钢筋陶粒混凝土作为包裹材料，采用试验和有限元分析方法，对高1.72 m的T形柱在轴向压力下的力学性能进行研究。对比分析包裹层箍筋端部是否与型钢腹板焊接连接对柱子承载力的影响。研究表明：陶粒混凝土在极限荷载后才发生明显开裂和脱落，混凝土包裹层和型钢黏结效果较好；混凝土包裹层使型钢柱强度充分利用，型钢可达到屈服强度；混凝土的包裹对型钢产生有效约束，破坏前型钢未发生明显局部和整体失稳，提高了试件延性和承载力。箍筋端部与型钢腹板焊接与否，对试件承载力影响不大，焊接加强了箍筋端与型钢的连接从而约束纵筋变形，减轻对混凝土的破坏。
- 陶粒混凝土 /
- 混凝土包裹钢 /
- T形钢柱 /
- 轴压试验
Abstract: A kind of T-shaped steel column wrapped with ceramsite concrete was proposed. With the good thermal insulation and impermeability performance of ceramsite concrete, it has been used as covering material to improve column's insulated and fireproof performances. Axial compression test and finite element analysis were carried out on two 1 720 mm high T-shaped columns to obtain the mechanical properties. The effects of stirrup end and steel web welded or not on the bearing capacity of specimens were discussed. The results indicated that the obvious cracking and ceramsite concrete's falling off did not occur until arrived the ultimate load, which proved that the concrete and steel had good bonding effects. Benefiting from the concrete cover, the strength of the steel column was fully utilized and the steel might reach the yield strength. Because ceramsite concrete provided an effective restraint for the inner steel, the local and overall buckling of the steel column were avoided, and the ductility and bearing capacity of the specimen were improved. Welding stirrup ends on the web of T-shaped steel had little effect on the bearing capacity of the specimen. The connections between the stirrup ends and steel were strengthened, which constrained the deformation of longitudinal reinforcement and reduced the damage of concrete.
- ceramsite concrete /
- concrete wrapped steel /
- T-shaped steel column /
- axial compression test

HTML全文

参考文献(16)

[1]	LIU X C, CUI F Y, ZHAN X X. Seismic Performance of Bolted Connection of H-Beam to HSS-Column with Web End-Plate[J]. Journal of Constructional Steel Research, 2019, 156:167-181.
[2]	吴波, 段静, 文波.新型防火涂料的研制及再生混合组合楼板的耐火性能试验[J]. 土木工程学报, 2014, 47(2):82-92.
[3]	SAKUMOTO Y, HIRAKAWA T, MASUDA H, et al. Fire Resistance of Walls and Floors Using Light-Gauge Steel Shapes[J]. Journal of Structural Engineering, 2003. 129(11):1522-1530.
[4]	徐亚丰, 刁晓征, 王鑫.十字形实腹式钢骨混凝土异形柱非线性分析[J]. 建筑结构, 2010, 40(7):96-98.
[5]	苏益声, 胡飞鹏, 杨德磊.钢骨混凝土异形柱正截面承载力影响因素探讨[J]. 广西大学学报(自然科学版), 2005(4):272-274.
[6]	徐金俊, 陈宗平, 薛建阳.型钢混凝土T形截面构件抗震能试验研究[J]. 建筑结构学报, 2018, 39(6):119-130.
[7]	谭清华, 周侃, 韩林海.火灾后型钢混凝土构件抗弯和轴压刚度计算方法[J]. 清华大学学报(自然科学版), 2015, 55(6):597-603.
[8]	丁艳, 杨正宏, 陈刚.陶粒混凝土性能研究[J]. 粉煤灰, 2007(2):3-4.
[9]	王新堂, 周明, 王万祯, 等.轻骨料钢管混凝土短柱受火后力学性能的试验研究[J]. 土木工程学报, 2011, 44(12):34-41.
[10]	MA Q M, GUO R X, SUN Y L. Behaviour of Modified Lightweight Aggregate Concrete After Exposure to Elevated Temperatures[J]. Magazine of Concrete Research, 2018, 70(5):217-230.
[11]	YANG Z H, SONG W J, YANG J H. High-Strength Ceramsite Made with Sludge and Low-Quality Fly Ash[J]. Journal of Materials in Civil Engineering, 2013, 25(7):851-856.
[12]	田水, 谷倩, 张威.涂覆钢筋陶粒混凝土梁延性及耗能性能的试验研究[J]. 武汉理工大学学报, 2017, 39(10):49-53.
[13]	蒋利学, 邓景纹, 忻鼎康, 等.陶粒混凝土异形柱框架抗震性能试验研究[J]. 建筑结构, 2003, 33(9):33-36.
[14]	中华人民共和国建设部.轻骨料混凝土结构技术规程:JGJ 12-2006[S]. 北京:中国建筑工业出版社, 2006.
[15]	杜明军. 钢与混凝土组合结构节点及构件数值分析方法研究[D].天津:天津大学, 2009.
[16]	王静峰, 韩林海, 江莹. 方钢管混凝土柱-钢梁外加强环节点的非线性有限元分析[J]. 沈阳建筑大学学报(自然科学版), 2007(2):177-181.