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

卷:

36卷

期数:

2019年03期

页码:

37-45

栏目:

出版日期:

2019-05-22

文章信息/Info

Title:

Analysis on Mechanical Behavior of Tapered Concrete-filled Double Steel Tubular Short Columns Under Axial Compression

文章编号:

1673-2049(2019)03-0037-09

作者:

王文达,张超峰,王景玄,郑 龙

(兰州理工大学 土木工程学院,甘肃 兰州 730050)

Author(s):

WANG Wen-da, ZHANG Chao-feng, WANG Jing-xuan, ZHENG Long

(School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China)

关键词:

圆锥形中空夹层钢管混凝土;  轴压;  空心率;  荷载-位移曲线;  受力机理

Keywords:

tapered concrete-filled double steel tube;  axial compression;  hollow section ratio;  load-displacement curve;  mechanical behavior

分类号:

TU398

DOI:

-

文献标志码:

A

摘要:

为了研究圆锥形中空夹层钢管混凝土轴压短柱的受力机理,通过有限元软件ABAQUS建立了该类构件的力学模型,并与已有试验数据进行对比,验证了模型的合理性。分析了典型构件的受力全过程荷载-应变关系曲线、钢管与混凝土之间的相互作用力、破坏模态和荷载分配; 同时分析了空心率、锥度、钢管径厚比和混凝土强度等参数对相互作用力的影响。结果表明:典型构件荷载-应变关系曲线可分为弹性段、弹塑性段、下降段和稳定段4个阶段; 构件破坏是由外钢管向外鼓曲所导致的,破坏截面约在0.8H(H为构件高度)柱高处; 锥度和空心率的改变对构件破坏截面位置影响较大,随着锥度和空心率的增大,破坏截面位置逐渐向柱顶靠近; 影响外钢管与混凝土之间相互作用力的主要因素有空心率、锥度、外钢管径厚比、外钢管屈服强度和混凝土强度; 影响内钢管与混凝土之间相互作用力的主要因素有空心率、锥度和外钢管屈服强度; 内钢管径厚比与内钢管屈服强度对混凝土与内、外钢管之间的相互作用力影响较小,可不作为主要参数进行分析。

Abstract:

In order to study the mechanical behavior of tapered concrete-filled double steel tubular(CFDST)short columns under axial compression, the mechanical model was established by the ABAQUS software, and the results were compared with the existing experimental data to verify the rationality of the model. The load-displacement curve, interaction stress between steel tubes and concrete, failure modes and load distribution of typical member were investigated respectively. The hollow ratio, tapered angle, ratio of diameter and thickness of steel tube and concrete strength to the influence of interaction stress between steel tubes and concrete were also analyzed. The result indicates that the load-displacement curve of tapered CFDST short column is divided into elastic stage, elastic-plastic stage, descending stage and maintenance stage.The failure of the member is caused by the outward bending of the outer steel tube, and the fracture cross section is at the height of 0.8H(H is the height of member). The changes of tapered angle and hollow section ratio have a great influence on the position of failure cross section, with the increase of tapered angle and hollow section ratio, the position of failure cross section is closer to the top of the column. The main factors affect the interaction stress between outer steel tube and concrete are hollow section ratio, tapered angle, ratio of diameter and thickness of outer steel tube, outer steel tube yield strength and concrete strength. The main factors affect the compressive stress between inner steel tube and concrete are hollow section ratio, tapered angle and outer steel tube yield strength. The ratio of diameter and thickness of inner steel tube and yield strength of inner steel tube have little effect on the compressive stress between steel tubes and concrete, and may not be analyzed as the main parameter.

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相似文献/References:

[1]张志权,赵胜民,张玉芬,等.外方内圆钢管混凝土轴压承载力计算方法[J].建筑科学与工程学报,2009,26(02):63.
　ZHANG Zhi-quan,ZHAO Sheng-min,ZHANG Yu-fen,et al.Calculation Method of Axial Bearing Capacity of Concrete-filled Square Steel Tubular Columns Reinforced by Inner Circular Steel Tube[J].Journal of Architecture and Civil Engineering,2009,26(03):63.
[2]宋兵,王湛.高强混凝土自收缩对钢管混凝土轴压力学性能的影响[J].建筑科学与工程学报,2007,24(02):59.
　SONG Bing,WANG Zhan.Influences of Autogenous Shrinkage of High-strength Concrete on AxialCompression Mechanics Behavior of Concrete-filled Steel Tube[J].Journal of Architecture and Civil Engineering,2007,24(03):59.
[3]任志刚,刘 闯,王丹丹,等.带约束拉杆圆端形钢管混凝土短柱轴压工作机理[J].建筑科学与工程学报,2019,36(05):39.
　REN Zhi-gang,LIU Chuang,WANG Dan-dan,et al.Axial Compression Mechanism of Round-ended Concrete-filled Steel Tubular Stub Short Columns with Binding Bars[J].Journal of Architecture and Civil Engineering,2019,36(03):39.
[4]史艳莉,张 宸,王景玄,等.圆锥形中空夹层钢管混凝土压弯构件抗震性能[J].建筑科学与工程学报,2019,36(05):80.
　SHI Yan-li,ZHANG Chen,WANG Jing-xuan,et al.Seismic Behavior of Tapered Concrete-filled Double Skin Steel Tube Compression-bending Members[J].Journal of Architecture and Civil Engineering,2019,36(03):80.
[5]胡 晨,张慧洁,王静峰,等.不同加强措施下轴压部分包覆钢-混凝土组合柱抗火性能研究[J].建筑科学与工程学报,2022,39(02):19.[doi:10.19815/j.jace.2021.08082]
　HU Chen,ZHANG Hui-jie,WANG Jing-feng,et al.Study on Fire Resistance of Axially Compressed Partially-encased Composite Steel and Concrete Columns with Different Strengthening Measures[J].Journal of Architecture and Civil Engineering,2022,39(03):19.[doi:10.19815/j.jace.2021.08082]

备注/Memo

备注/Memo:

收稿日期:2018-09-18
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: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.cn。

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更新日期/Last Update: 2019-05-23