|本期目录/Table of Contents|

[1]史艳莉,张文旭,贾志路,等.内配型钢矩形钢管混凝土轴压短柱生命周期内的力学性能[J].建筑科学与工程学报,2020,37(03):81-90.[doi:10.19815/j.jace.2019.05053]
 SHI Yan-li,ZHANG Wen-xu,JIA Zhi-lu,et al.Mechanical Behavior of Rectangular Concrete-filled Steel Tubular Stub Columns with Encased Profiled Steel Subjected to Axial Load in Life Cycle[J].Journal of Architecture and Civil Engineering,2020,37(03):81-90.[doi:10.19815/j.jace.2019.05053]
点击复制

内配型钢矩形钢管混凝土轴压短柱生命周期内的力学性能(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03期
页码:
81-90
栏目:
出版日期:
2020-05-30

文章信息/Info

Title:
Mechanical Behavior of Rectangular Concrete-filled Steel Tubular Stub Columns with Encased Profiled Steel Subjected to Axial Load in Life Cycle
文章编号:
1673-2049(2020)03-0081-10
作者:
史艳莉张文旭贾志路王文达
(兰州理工大学 土木工程学院,甘肃 兰州 730050)
Author(s):
SHI Yan-li ZHANG Wen-xu JIA Zhi-lu WANG Wen-da
(School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China)
关键词:
内配型钢矩形钢管混凝土轴压短柱 生命周期 初应力 长期荷载 力学性能
Keywords:
rectangular CFST stub column with encased profiled steel subjected to axial load life cycle initial stress long-term load mechanical behavior
分类号:
TU398
DOI:
10.19815/j.jace.2019.05053
文献标志码:
A
摘要:
为了研究内配型钢矩形钢管混凝土轴压短柱在生命周期内的受力机理,利用有限元软件ABAQUS建立该类短柱的计算模型,并与已有的相关试验结果进行对比。模型中将钢管初应力和长期荷载作为生命周期内的主要因素进行考虑,分析了内配型钢矩形钢管混凝土轴压短柱生命周期内的荷载-变形全过程曲线、跨中截面各部件纵向应力分布和钢材与混凝土之间的相互作用力; 考察了初应力系数、长期荷载比和含钢率对构件承载力和变形的影响规律。结果表明:考虑钢管初应力和长期荷载作用的内配型钢矩形钢管混凝土轴压短柱极限承载力与一次加载情况下相比变化不明显,但极限承载力对应的纵向应变增长84.2%; 在长期持荷阶段,核心混凝土发生卸载现象,其承担的荷载下降了30%左右,再加载阶段又继续承载; 钢管与混凝土之间的接触应力在中截面处最大,沿构件长度方向逐渐向两端减小; 随着钢管含钢率增大,构件极限承载力增大,变形减小,而型钢含钢率对构件变形影响较小; 随着初应力系数和长期荷载比的增大,构件纵向变形增大。
Abstract:
In order to study the life cycle force mechanism of rectangular concrete-filled steel tubular(CFST)axial compressive stub columns with encased profiled steel, the finite element software ABAQUS was used to establish the calculation models and the models were compared with the relevant test results. The main influence factors such as initial stress of steel tube and long-term load were considered in the life cycle. The whole process load-deformation curves in life cycle, the longitudinal stress distribution of components in midspan section and the interaction between steel and concrete of rectangular concrete-filled steel tubular axial compressive stub columns with encased profiled steel were analyzed. Furthermore, the influences of initial stress coefficient, long-term load ratio and steel ratio on the bearing capacity and deformation of the component were also investigated. The results show that the ultimate bearing capacity of rectangular CFST axial compressive stub columns with encased profiled steel with the initial stress of steel tube and long-term load does not change significantly compared with the once loading, but the longitudinal strain corresponding to the ultimate bearing capacity increases by 84.2%. During the long-term sustained stage, the core concrete is unloading and the bear capacity of concrete decreases by about 30%, but it continues to bear in the reloading stage. The maximum contact stress between steel tube and concrete appears at the middle section and the contact stress decreases gradually along the length of the member. With the increase of steel ratio of steel tube, the ultimate bearing capacity of the component increases and the deformation decreases, while the steel ratio of profiled steel has little effect on the deformation of the component. Finally, with the increase of the initial stress coefficient and the long-term load ratio, the longitudinal deformation of specimens increases.

参考文献/References:

[1] 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.
[2]钟善桐,查晓雄.钢管初应力对钢管混凝土构件承载力影响的研究[J].哈尔滨建筑大学学报,1997,30(3):13-22.
ZHONG Shan-tong,ZHA Xiao-xiong.Research of the Influence of Initial Stress in Steel Tube on Load Carrying Capacity for Concrete Filled Steel Tubular(CFST)Members[J].Journal of Harbin University of Civil Engineering and Architecture,1997,30(3):13-22.
[3]查晓雄,钟善桐.用有限元法分析钢管初应力对钢管混凝土轴压构件基本性能的影响[J].哈尔滨建筑大学学报,1997,30(1):41-49.
ZHA Xiao-xiong,ZHONG Shan-tong.The Behavior Effect on Concrete Filled Steel Tubular Members Subjected to Compression Under the Initial Stress of Steel Tube Based on the Finite Element Method[J].Journal of Harbin University of Civil Engineering and Architecture,1997,30(1):41-49.
[4]韩林海,尧国皇.钢管初应力对钢管混凝土压弯构件承载力的影响研究[J].土木工程学报,2003,36(4):9-18.
HAN Lin-hai,YAO Guo-huang.Effect of Initial Stress on Bearing Capacity of Concrete-filled Steel Tubular Beam-columns[J].China Civil Engineering Journal,2003,36(4):9-18.
[5]LI W,HAN L H,ZHAO X L.Axial Strength of Concrete-filled Double Skin Steel Tubular(CFDST)Columns with Preload on Steel Tubes[J].Thin-walled Structures,2012,56:9-20.
[6]HUANG F Y,YU X M,CHEN B C,et al.Study on Preloading Reduction of Ultimate Load of Circular Concrete-filled Steel Tubular Columns[J].Thin-walled Structures,2016,98:454-464.
[7]史艳莉,陈彦玉,王文达.钢管初应力对内配型钢钢管混凝土偏压柱受力性能的影响[J].建筑科学,2018,34(3):55-62.
SHI Yan-li,CHEN Yan-yu,WANG Wen-da.Effect of Initial Stresses on Steel Tube on the Behavior of Concrete Filled Tubular Columns with Inner Profiled Steel Subjected to Eccentric Loading[J].Building Science,2018,34(3):55-62.
[8]韩林海,陶 忠,刘 威,等.长期荷载作用对方钢管混凝土柱承载力的影响[J].中国公路学报,2001,14(3):57-61,66.
HAN Lin-hai.TAO Zhong,LIU Wei,et al.Effects of Long-term Loads on the Strength of Concrete-filled Steel Box Columns[J].China Journal of Highway and Transport,2001,14(3):57-61,66.
[9]韩林海,杨有福,刘 威.长期荷载作用对矩形钢管混凝土轴心受压柱力学性能的影响研究[J].土木工程学报,2004,37(3):12-18.
HAN Lin-hai,YANG You-fu,LIU Wei.The Behavior of Concrete-filled Steel Tubular Columns with Rectangular Section Under of Long-term Loading[J].China Civil Engineering Journal,2004,37(3):12-18.
[10]史艳莉,陈彦玉,王文达.长期荷载作用下内置钢骨钢管混凝土轴压短柱受力性能研究[J].建筑科学,2016,32(9):61-68.
SHI Yan-li,CHEN Yan-yu,WANG Wen-da.Research on Mechanical Behavior of CFST Axial Compressive Stub Column with Encased Profiled Steel Under Long-term Loading[J].Building Science,2016,32(9):61-68.
[11]HAN L H,LI Y J,LIAO F Y.Concrete-filled Double Skin Steel Tubular(CFDST)Columns Subjected to Long-term Sustained Loading[J].Thin-walled Structures,2011,49:1534-1543.
[12]LIU H,WANG Y X,HE M H,et al.Strength and Ductility Performance of Concrete-filled Steel Tubular Columns After Long-term Service Loading[J].Engineering Structures,2015,100:308-325.
[13]LI W,HAN L H,ZHAO X L.Behavior of CFDST Stub Columns Under Preload,Sustained Load and Chloride Corrosion[J].Journal of Constructional Steel Research,2015,107:12-23.
[14]HAN L H,HOU C C,WANG Q L.Behavior of Circular CFST Stub Columns Under Sustained Load and Chloride Corrosion[J].Journal of Constructional Steel Research,2014,103:23-36.
[15]HAN L H,HOU C,WANG Q L.Square Concrete Filled Steel Tubular(CFST)Members Under Loading and Chloride Corrosion:Experiments[J].Journal of Constructional Steel Research,2012,71:11-25.
[16]HOU C C,HAN L H.Life-cycle Performance of Deteriorated Concrete-filled Steel Tubular(CFST)Structures Subject to Lateral Impact[J].Thin-walled Structures,2018,132:362-374.
[17]LI Y J,LI G,HOU C,et al.Long-term Experimental Behavior of Concrete-encased CFST with Preload on the Inner CFST[J].Journal of Constructional Steel Research,2019,155:355-369.
[18]李永进.考虑长期荷载作用影响时钢管混凝土柱的力学性能研究[D].福州:福州大学,2009.
LI Yong-jin.Effects of Long-term Sustained Loads on the Behavior of Concrete Filled Steel Tubular Columns[D].Fuzhou:Fuzhou University,2009.
?

相似文献/References:

[1]肖建庄,陈立浩,叶建军,等.混凝土结构拆除技术与绿色化发展[J].建筑科学与工程学报,2019,36(05):1.
 XIAO Jian-zhuang,CHEN Li-hao,YE Jian-jun,et al.Technology and Green Development of Demolition for Concrete Structures[J].Journal of Architecture and Civil Engineering,2019,36(03):1.

备注/Memo

备注/Memo:
收稿日期:2019-07-16
基金项目:国家自然科学基金项目(51768038); 甘肃省高校协同创新团队项目(2018C-08)
作者简介:史艳莉(1977-),女,河北涿州人,副教授,工学博士,E-mail:ceshiyl@163.com。
通信作者:王文达(1976-),男,甘肃天水人,教授,博士研究生导师,工学博士,E-mail:wangwd@lut.edu.cn。
更新日期/Last Update: 2020-06-08