圆钢管约束陶粒混凝土短柱的单轴受压试验研究及承载力计算

王宇航; 赵玉婷; 周绪红; 李琦琦

doi:10.13204/j.gyjzG21112411

圆钢管约束陶粒混凝土短柱的单轴受压试验研究及承载力计算

doi: 10.13204/j.gyjzG21112411

重庆大学土木工程学院, 重庆 400044

基金项目:

国家自然科学基金项目（51822804）；霍英东教育基金会青年教师基金项目（171066）。

详细信息

作者简介:
王宇航,男,1985年出生,工学博士,博士后,教授,博士生导师。电子信箱:wangyuhang@cqu.edu.cn

计量
- 文章访问数: 431
- HTML全文浏览量: 31
- PDF下载量: 31
- 被引次数: 0
出版历程
- 收稿日期: 2021-11-24
- 网络出版日期: 2022-04-24

Experimental Research and Bearing Capacity Calculation of Ceramsite Concrete Filled Circular Steel Tube Short Column Under Uniaxial Compression

School of Civil Engineering, Chongqing University, Chongqing 400044, China

摘要

摘要: 通过对14根圆钢管约束陶粒混凝土短柱进行单轴受压试验，研究钢管屈服强度、径厚比和钢管与陶粒混凝土的接触对其破坏形态、荷载-位移曲线、荷载-应变曲线、荷载-横向变形系数和承载力的影响。结果表明：轴压作用下，试件均为剪切破坏，剪切角约60°，荷载-位移曲线无明显下降段。D/t≥19时极限承载力随着径厚比的减小而增大。钢管屈服强度越高，钢管与混凝土间贴膜，钢管对混凝土的约束作用越大。不考虑钢管与混凝土间接触的影响，计算结果与试验结果吻合较好。
- 圆钢管约束陶粒混凝土 /
- 单轴受压 /
- 约束效应 /
- 极限承载力 /
- 接触
Abstract: Uniaxial compression tests were carried out on 14 short ceramsite concrete columns confined by circular steel tubes. The effects of the yield strength of steel tube, the ratio of diameter to thickness, and the contact between steel tube and ceramsite concrete on the failure mode, load-displacement curve, load-strain curve, load-lateral deformation coefficient, and bearing capacity were studied experimentally. The results showed that all specimens exhibited shear failure under axial compression, and the shear angle was about 60°, and the load-displacement curve had no obvious descending section. When D/t ≥ 19, the ultimate bearing capacity increased with the decrease of the ratio of diameter to thickness. The higher the yield strength of steel pipe and the film between the steel pipe and the concrete, the greater the restraint effect of the steel pipe on the concrete. The calculation results were in good agreement with the test results without considering the influence of the contact between steel tube and concrete.
- ceramsite concrete filled circular steel tube /
- uniaxial compression /
- effect of restraint /
- ultimate bearing capacity /
- contact

HTML全文

参考文献(28)

[1]	中华人民共和国建设部.轻集料混凝土技术规程:JGJ 51-2002[S].北京:中国建筑工业出版社,2002.
[2]	YU Q L, SPIESZ P, BROUWERS H. Ultralightweight concrete:conceptual design and performance evaluation[J]. Cement & Concrete Composites, 2015, 61:18-28.
[3]	刘平,葛婷,王小亮.LC7.5轻质陶粒混凝土的配制与性能研究[J].建材发展导向,2019,17(12):105-108.
[4]	GAO J, SUN W, MORINO K. Mechanical properties of steel fiber-reinforced, high-strength, lightweight concrete[J]. Cement and Concrete Composites, 1997, 19(4):307-313.
[5]	WANG P T, SHAH S P, NAAMAN A E. Stress-strain curves of normal and lightweight concrete in compression[J]. Journal of American Concrete Institute, 1978,75(11):603-611.
[6]	王振宇, 丁建彤, 郭玉顺. 结构轻骨料混凝土的应力-应变全曲线[J]. 混凝土, 2005(3):39-41,66.
[7]	叶列平, 孙海林, 陆新征, 等. 高强轻骨料混凝土结构性能、分析与计算[M]. 北京:科学出版社, 2009:1-4.
[8]	ZHANG M H, GJVORV O E. Mechanical properties of high-strength lightweight concrete[J]. Materials Journal, 1991, 88(3):240-247.
[9]	董祥. 纤维增强高性能轻骨料混凝土物理力学性能、抗冻性及微观结构研究[D]. 南京:东南大学, 2005.
[10]	田耀刚. 高强次轻混凝土的研究[D].武汉:武汉理工大学,2005.
[11]	周绪红,刘界鹏.钢管约束混凝土柱的性能与设计[M]. 北京:科学出版社,2010.
[12]	ZHAN Y, ZHAO R, MA Z J, et al. Behavior of prestressed concrete-filled steel tube (CFST) beam[J]. Engineering Structures, 2016, 122:144-155.
[13]	LAI M H, HO J C M. A theoretical axial stress-strain model for circular concrete-filled-steel-tube columns[J]. Engineering Structures, 2016, 125:124-143.
[14]	FAKHARIFAR M, CHEN G. Compressive behavior of FRP-confined concrete-filled PVC tubular columns[J]. Composite Structures, 2016, 141:91-109.
[15]	WANG X D,LIU J P,ZHANG S M.Behavior of short circular tubed-reinforced-concrete columns subjected to eccentric compression[J]. Engineering Structures,2015,105:77-86.
[16]	张素梅,刘界鹏,马乐,等.圆钢管约束高强混凝土轴压短柱的试验研究与承载力分析[J].土木工程学报,2007,40(3):24-31.
[17]	WANG X D,LIU J P,ZHANG S M.Behavior of short circular tubed-reinforced-concrete columns subjected to eccentric compression[J]. Engineering Structures,2015,105:77-86.
[18]	ZHOU X H,LIU J P,WANG X D,et al.Behavior and design of slender circular tubed-reinforced-concrete columns subjected to eccentric compression[J]. Engineering Structures,2016,124:17-28.
[19]	周绪红,闫标,刘界鹏,等.不同长径比圆钢管约束钢筋混凝土柱轴压承载力研究[J].建筑结构学报,2018,39(12):11-21.
[20]	甘丹. 钢管约束混凝土短柱的静力性能和抗震性能研究[D].兰州:兰州大学,2012.
[21]	刘文晓,姜凡,李淼,等.圆钢管约束轻骨料钢筋混凝土轴压短柱力学性能试验[J].混凝土,2020(8):19-22,26.
[22]	高喜安,吴成龙,李斌.方钢管约束轻骨料混凝土轴压短柱的力学性能[J].科学技术与工程,2018,18(12):256-261.
[23]	宋玉普, 赵国藩. 轻骨料砼在双轴压压及拉压状态下的变形和强度特性[J]. 建筑结构学报, 1994, 15(2):17-21.
[24]	杨明. 钢管约束下核心轻集料混凝土基本力学性能研究[D].南京:河海大学,2006.
[25]	李帼昌,刘之洋,杨良志.钢管煤矸石砼中核心砼的强度准则及本构关系[J].东北大学学报,2002(1):64-66.
[26]	吴东阳,傅中秋,吉伯海,等.钢管约束下轻集料混凝土本构模型[J].扬州大学学报(自然科学版),2019,22(1):67-73.
[27]	颜燕祥,徐礼华,蔡恒,等.高强方钢管超高性能混凝土短柱轴压承载力计算方法研究[J].建筑结构学报,2019,40(12):128-137.
[28]	MANDER J B, PRIESTLEY M J N, PARK R. Theoretical stress-strain model for confined concrete[J]. Journal of Structural Engineering, 1988, 114(8):1804-1826.