|本期目录/Table of Contents|

[1]任志刚,肖 萌.圆端形钢管混凝土构件纯弯力学性能[J].建筑科学与工程学报,2020,37(02):44-53.[doi:10.19815/j.jace.2019.03019]
 REN Zhi-gang,XIAO Meng.Mechanical Behaviors of Concrete-filled Round End Steel Tubular Members Under Pure Bending[J].Journal of Architecture and Civil Engineering,2020,37(02):44-53.[doi:10.19815/j.jace.2019.03019]
点击复制

圆端形钢管混凝土构件纯弯力学性能(PDF)
分享到:

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
37卷
期数:
2020年02期
页码:
44-53
栏目:
出版日期:
2020-03-30

文章信息/Info

Title:
Mechanical Behaviors of Concrete-filled Round End Steel Tubular Members Under Pure Bending
文章编号:
1673-2049(2020)02-0044-10
作者:
任志刚肖 萌
(武汉理工大学 建筑与土木工程学院,湖北 武汉 430070)
Author(s):
REN Zhi-gang XIAO Meng
(School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, Hubei, China)
关键词:
圆端形钢管混凝土构件 纯弯 力学性能 抗弯承载力
Keywords:
concrete-filled round end steel tubular member pure bending mechanical behavior bending capacity
分类号:
TU398
DOI:
10.19815/j.jace.2019.03019
文献标志码:
A
摘要:
为研究圆端形钢管混凝土构件的纯弯力学性能,对4个构件进行了纯弯试验,分析了高宽比和含钢率对纯弯曲作用下圆端形钢管混凝土构件破坏形态、挠度曲线、截面应变、抗弯承载力的影响。基于ABAQUS建立有限元模型对圆端形钢管混凝土构件纯弯性能进行模拟,试验结果与模拟结果吻合良好,利用验证后的模型对圆端形钢管混凝土构件进行了受力全过程分析以及参数分析。最后基于ABAQUS参数分析结果提出了圆端形钢管混凝土构件抗弯承载力计算公式,公式计算结果与试验结果吻合良好。结果表明:圆端形钢管混凝土构件在纯弯曲作用下发生了明显的挠度变形,当跨中挠度达到L/25(L为试件长度)时,试件仍能承受较大的荷载,表现出良好的延性; 圆端形钢管混凝土构件的挠度曲线可假设为正弦半波曲线,其跨中截面基本保持为平截面; 当构件达到抗弯承载力时,钢管承受了大部分弯矩,圆弧段钢管相较于平直段钢管对混凝土的约束作用更强; 圆端形钢管混凝土构件的抗弯承载力随钢材强度的增大而增大,而混凝土强度的改变对其抗弯性能影响较小。
Abstract:
In ordor to explore the flexural behavior of concrete-filled round end steel tubular(RCFST)members, 4 members were tested under pure bending. The effects of sectional aspect ratios and steel ratios on failure mode, deflection curve, section strain and bending capacity of RCFST members under pure bending were analyzed. The flexural behavior of RCFST members was simulated by the finite element model based on the software ABAQUS. The experimental results were in good agreement with the simulation results. The verified model was used to analyze the whole process and the effects of parameters. Finally, based on ABAQUS simulation analysis, a formula for calculating the bending capacity of RCFST members was proposed. The calculation results agreed well with the experimental results. The results show that RCFST members have obvious deflection deformation under pure bending. When the mid-span deflection reaches L/25(L is the length of specimen), the specimens can bear large load and perform good ductility. The deflection curve of RCFST members can be assumed to be a sinusoidal half-wave curve, and the mid-span section is substantially maintained as a flat section. When the members reach the bending capacity, the steel tube bears most of the moment, and the round end steel tube has stronger confinement effect on the concrete than the rectangular part of the steel tube. The bending capacity of RCFST members increases with the increase of the steel strength, while the change of the concrete strength has little effect on the flexural behavior.

参考文献/References:

[1] HAN L H,LI W,BJORHOVDE R.Developments and Advanced Applications of Concrete-filled Steel Tubular(CFST)Structures:Members[J].Journal of Constructional Steel Research,2014,100:211-228.
[2]丁发兴,傅 强,方常靖.圆端形耐候钢管混凝土轴压短柱力学性能研究[J].铁道工程学报,2017,34(11):33-38.
DING Fa-xing,FU Qing,FANG CHANG-jing.Research on the Mechanical Behavior of Concrete-filled Round-ended Weathering Steel Tubular Stub Columns Under Axially Compressive Loading[J].Journal of Railway Engineering Society,2017,34(11):33-38.
[3]王志滨,陈 靖,谢恩普,等.圆端形钢管混凝土柱轴压性能研究[J].建筑结构学报,2014,35(7):123-130.
WANG Zhi-bin,CHEN Jing,XIE En-pu,et al.Behavior of Concrete-filled Round-end Steel Tubular Stub Columns Under Axial Compression[J].Journal of Building Structures,2014,35(7):123-130.
[4]谷利雄,丁发兴,付 磊,等.圆端形钢管混凝土轴压短柱受力性能研究[J].中国公路学报,2014,27(1):57-63.
GU Li-xiong,DING Fa-xing,FU Lei,et al.Mechanical Behavior of Concrete-filled Round-ended Steel Tubular Stub Columns Under Axial Load[J].China Journal of Highway and Transport,2014,27(1):57-63.
[5]付 磊,丁发兴,谷利雄,等.圆端形钢管内约束混凝土轴压短柱的力学性能[J].华南理工大学学报:自然科学版,2014,42(11):113-120.
FU Lei,DING Fa-xing,GU Li-xiong,et al.Mechanical Properties of Stirrups Confinement Concrete-filled Round-ended Steel Tubular Stub Short Columns Under Axial Compression[J].Journal of South China University of Technology:Natural Science Edition,2014,42(11):113-120.
[6]谢恩普,王志滨,林 盛,等.圆端形钢管混凝土轴压短柱的机理分析[J].福州大学学报:自然科学版,2015,43(4):517-522.
XIE En-pu,WANG Zhi-bin,LIN Sheng,et al.Mechanism Analysis on Concrete-filled Round-end Steel Tubular Stub Columns Under Axial Load[J].Journal of Fuzhou University:Natural Science Edition,2015,43(4):517-522.
[7]HASSANEIN M F,PATEL V I.Round-ended Rectangular Concrete-filled Steel Tubular Short Columns:FE Investigation Under Axial Compression[J].Journal of Constructional Steel Research,2018,140:222-236.
[8]王二磊.圆端形钢管混凝土塔柱受压力学性能与可靠度研究[D].武汉:武汉理工大学,2012.
WANG Er-lei.Research on Compressive Behavior and Reliability of Round-ended Steel Tube-filled Concrete Column[D].Wuhan:Wuhan University of Technology,2012.
[9]李锦华,王二磊.圆端形钢管混凝土偏压构件受力性能研究[J].武汉理工大学学报,2016,38(4):50-53.
LI Jin-hua,WANG Er-lei.Mechanical Behavior of Round-ended Steel Tube Under Eccentric Load[J].Journal of Wuhan University of Technology,2016,38(4):50-53.
[10]李德山,池思源,王志滨.圆端形钢管混凝土柱偏压力学性能研究[J].福州大学学报:自然科学版,2016,44(4):538-542.
LI De-shan,CHI Si-yuan,WANG Zhi-bin.Mechanical Behavior of Round-end Concrete-filled Steel Tubular Columns Under Eccentric Load[J].Journal of Fuzhou University:Natural Science Edition,2016,44(4):538-542.
[11]王静峰,於忠华,沈奇罕,等.圆端形椭圆钢管混凝土受扭性能数值分析及抗扭承载力计算[J].建筑科学与工程学报,2018,35(3):7-15.
WANG Jing-feng,YU Zhong-hua,SHEN Qi-han,et al.Torsional Behavior Numerical Analysis and Torsion Bearing Capacity Calculation of Circular-end Elliptical Concrete-filled Steel Tube[J].Journal of Architecture and Civil Engineering,2018,35(3):7-15.
[12]GB/T 228—2002,金属材料室温拉伸试验方法[S].
GB/T 228—2002,Metallic Materials — Tensile Testing at Ambient Temperature[S].
[13]GB/T 50081—2002,普通混凝土力学性能试验方法标准[S].
GB/T 50081—2002,Standard for Method of Test Mechanical Properties on Ordinary Concrete[S].
[14]HAN L H,YAO G H,TAO Z.Performance of Concrete-filled Thin-walled Steel Tubes Under Pure Torsion[J].Steel Construction,2007,45:24-36.
[15]杨有福,马国梁.不锈钢管再生混凝土弯曲性能[J].大连理工大学学报,2013,53(4):572-578.
YANG You-fu,MA Guo-liang.Flexural Performance of Recycled Aggregate Concrete Filled Stainless Steel Tube[J].Journal of Dalian University of Technology,2013,53(4):572-578.
[16]沈聚敏,王传志,江见鲸.钢筋混凝土有限元与板壳极限分析[M].北京:清华大学出版社,1993.
SHEN Ju-min,WANG Chuan-zhi,JIANG Jian-jing.Finite Element Method of Reinforced Concrete and Limite Analysis of Plates and Shells[M].Beijing:Tsinghua University Press,1993.
[17]HAN L H.Test on Stub Columns of Concrete-filled RHS Section[J].Journal of Constructional Steel Research,2002,58:353-372.
[18]刘 威.钢管混凝土局部受压时的工作机理研究[D].福州:福州大学,2005.
LIU Wei.Research on Mechanism of Concrete-filled Steel Tubes Subjected to Local Compression[D].Fuzhou:Fuzhou University,2005.
[19]于 清,陶 忠,陈志波,等.钢管约束混凝土纯弯构件抗弯力学性能研究[J].工程力学,2008,25(3):187-193.
YU Qing,TAO Zhong,CHEN Zhi-bo,et al.Flexural Behavior of Steel Tube Confined Concrete Members Under Pure Bending[J].Engineering Mechanics,2008,25(3):187-193.
[20]韩林海.钢管混凝土结构:理论与实践[M].3版.北京:科学出版社,2016.
HAN Lin-hai.Concrete Filled Steel Tubular Structures — Theory and Practice[M].3rd ed.Beijing:Science Press,2016.

相似文献/References:

备注/Memo

备注/Memo:
收稿日期:2019-03-06
基金项目:国家自然科学基金项目(51178179)
作者简介:任志刚(1974-),男,湖北武汉人,教授,博士研究生导师,工学博士,E-mail:whut.ren@163.com。
更新日期/Last Update: 2020-04-21