|Table of Contents|

Behavior of Round-ended Concrete-filled Steel Tube Stub Column with Different Central Angles Under Axial Load(PDF)

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

Issue:
2020年05期
Page:
77-87
Research Field:
Publishing date:

Info

Title:
Behavior of Round-ended Concrete-filled Steel Tube Stub Column with Different Central Angles Under Axial Load
Author(s):
REN Zhi-gang;  WANG Dan-dan
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, Hubei, China
Keywords:
round-ended concrete-filled steel tube;  ultimate bearing capacity;  experimental study;  central angle;  confinement effect
PACS:
TU311
DOI:
10.19815/j.jace.2019.05088
Abstract:
In order to study the mechanical properties of 60° and 120° round-ended concrete-filled steel tube stub columns under axial compression, four round-ended concrete-filled steel tube stub columns were tested to investigate the ultimate bearing capacity, considering the influence of different central angles and width-to-thickness ratios. Based on the test results, the finite element software ABAQUS was used to model the 3D solid. The parameters of the proposed round-ended concrete-filled steel tube stub columns were analyzed, and the influences of steel strength, concrete strength, width-thickness ratio, height-width ratio and size effect on the ultimate bearing capacity were studied. The results show that the failure modes are all local buckling, and the failure locations are located in the straight section. The ultimate bearing capacity of the columns increases when the central angle increases. The ultimate bearing capacity shows a downward trend when the width-thickness ratio increases. When the central angle of the circular arc increases from 60° to 120°, the strength index decreases, indicating that the overall confinement effect is weakened. The overall confinement effect of the round-ended concrete-filled steel tube stub column under axial load decreases with the increase of the central angle. With the increases of steel strength, concrete strength and decrease of width-to-thickness ratio, the ultimate bearing capacity increases gradually. The size effects of different central angles are similar to that of the initial stiffness. As the sizes of the member increases, the ultimate bearing capacity and initial stiffness show an increasing trend.

References:

[1] GIAKOUMELIS G,LAM D.Axial Capacity of Circular Concrete-filled Tube Columns[J].Journal of Constructional Steel Research,2004,60(7):1049-1068.
[2]张素梅,周 明.方钢管约束下混凝土的抗压强度[J].哈尔滨建筑大学学报,1999,32(3):14-18.
ZHANG Su-mei,ZHOU Ming.Ultimate Strength of Concrete Confined by RHS Steel Tubes[J].Journal of Harbin University of C.E.& Architecture,1999,32(3):14-18.
[3]HAN L H,LU H,YAO G H,et al.Further Study on the Flexural Behavior of Concrete-filled Steel Tubes[J].Journal of Constructional Steel Research,2006,62(6):554-565.
[4]HAN L H,LIU W,YANG Y F.Behavior of Concrete-filled Steel Tubular Stub Columns Subjected to Axially Local Compression[J].Journal of Constructional Steel Research,2008,64(4):377-387.
[5]HAN L H,LIU W,YANG Y F.Behavior of Thin Walled Steel Tube Confined Concrete Stub Columns Subjected to Axial Local Compression[J].Thin-walled Structures,2008,46(2):155-164.
[6]HAN L H,ZHENG L Q,HE S H,et al.Tests and Mechanics Model for Concrete Filled Steel Tubular Members Subjected to Axial Compression[J].Journal of Constructional Steel Research,2011,67(6):956-976.
[7]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.
[8]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,DINF 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.
[9]DING F X,FU L,YU Z W,et al.Mechanical Performances of Concrete-filled Steel Tubular Stub Columns with Round Ends Under Axial Loading[J].Thin-walled Structures,2015,97:22-34.
[10]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.
[11]WANG J F,SHEN Q H.Numerical Analysis and Design of Thin-walled RECFST Stub Columns Under Axial Compression[J].Thin-walled Structures,2018,129:166-182.
[12]谢建雄,蔡崇华,卢哲安,等.微膨胀钢管混凝土双肢柱试验研究与数值模拟[J].武汉大学学报:工学版,2010,43(4):485-489.
XIE Jian-xiong,CAI Chong-hua,LU Zhe-an,et al.Test Study and Numerical Simulation of Micro-expansive Round-ended Concrete Filled Steel Tubes Coupled Column[J].Engineering Journal of Wuhan University,2010,43(4):485-489.
[13]王二磊.圆端形钢管混凝土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.
[14]李 彬.圆端形钢管混凝土塔柱钢管与混凝土相互作用研究[D].武汉:武汉理工大学,2009.
LI Bin.Study on the Interaction Between Steel Tube and Concrete of Round-ended Concrete-filled Steel Tube Tower Column[D].Wuhan:Wuhan University of Technology,2009.
[15]马小春.圆端形钢管混凝土轴压试验研究[D].武汉:武汉理工大学,2012.
MA Xiao-chun.Research on Axial Compression Test About Concrete Filled Steel Tube of Round Tip Shape[D].Wuhan:Wuhan University of Technology,2012.
[16]李培鹏,任志刚.圆端形钢管混凝土短柱轴压性能仿真分析[J].武汉理工大学学报,2014,36(9):96-101.
LI Pei-peng,REN Zhi-gang.Simulation Analysis of Round-ended Rectangular CFST Stub Columns Under Axial Load[J].Journal of Wuhan University of Technology,2014,36(9):96-101.
[17]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.

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Last Update: 2020-10-15