[1]丁发兴,付磊,龚永智,等.方钢管混凝土轴压短柱的力学性能研究[J].深圳大学学报理工版,2014,31(6):583-592.[doi:10.3724/SP.J.1249.2014.06583]
　Ding Faxing,Fu Lei,Gong Yongzhi,et al.Behavior of concrete-filled square steel tubular stub columns under axially compressive loading[J].Journal of Shenzhen University Science and Engineering,2014,31(6):583-592.[doi:10.3724/SP.J.1249.2014.06583]
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方钢管混凝土轴压短柱的力学性能研究()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第31卷
期数:
2014年第6期
页码:
583-592
栏目:
土木建筑工程
出版日期:
2014-11-20

文章信息/Info

Title:
Behavior of concrete-filled square steel tubular stub columns under axially compressive loading
文章编号:
201406005
作者:
丁发兴; 付磊; 龚永智; 余志武
中南大学土木工程学院，长沙 410075
Author(s):
Ding Faxing;  Fu Lei;  Gong Yongzhi;  and Yu Zhiwu
School of Civil Engineering, Central South University, Changsha 410075, P.R.China
关键词:
结构工程; 方钢管混凝土短柱; 有限元分析;  应力云图; 加强区; 非加强区; 极限承载力
Keywords:
structural engineering;  concrete-filled square steel tubular stub columns;  finite element analysis;  stress nephogram;  enhanced area;  non-enhanced area;  ultimate bearing capacity
分类号:
TU 398
DOI:
10.3724/SP.J.1249.2014.06583
文献标志码:
A
摘要:
为研究方钢管混凝土轴压短柱力学性能，采用试验和ABAQUS有限元模拟分析相结合的方法，得到方钢管混凝土短柱实用承载力计算公式. 对3根方钢管混凝土轴压短柱试件进行试验研究，并应用ABAQUS软件对其进行三维实体有限元分析，模拟结果与试验结果吻合较好. 首先，在有限元模型得到验证的基础上，基于有限元法进行大量参数分析，确定方钢管混凝土轴压短柱极限状态时方钢管平均纵向应力与屈服强度的比值；其次，根据有限元模型得出核心混凝土处于极限状态时的应力云图，并将其简化为不受方钢管约束的非加强区核心混凝土和受方钢管均匀约束的加强区核心混凝土，确定两者的面积比；最后，在前两者的基础上根据极限平衡理论，提出一种新的方钢管混凝土轴压短柱承载力实用计算公式，并将该公式和现有公式计算结果以及已有的98组方钢管混凝土轴压短柱有效试验结果进行对比. 结果表明，该公式计算结果与试验结果吻合最好.
Abstract:
In order to understand the mechanical behaviors of square concrete-filled steel tubular (CFT) stub columns, an experimental study on 3 square CFT stub columns under concentric loading was made, and ABAQUS was used to establish the 3D finite element models and to analyze the behaviors of square CFT stub columns under axial compression. Based on finite element modeling, parametric analysis was carried out, and the value of average axial stress to yield stress of square steel tube was determined at ultimate state. According to the stress nephogram of core concrete at ultimate state, core concrete section can be simplified to a non-enhanced area without confinement and an enhanced area with uniform confinement from square steel tube, and the ratio of the non-enhanced area to the enhanced area was determined. Based on the limit equilibrium method, a practical calculation formula for the ultimate bearing capacity of square CFT stub columns was proposed. The results calculated from the practical formula were compared with those from other researchers as well as the test results of 98 specimens. The comparisons indicate that the practical calculation formula presented in this paper shows best agreement with experimental results.

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备注/Memo

备注/Memo:
Received：2014-06-24；Accepted：2014-09-10
Foundation：National Natural Science Foundation of China （50908230）；National Key Technology Support Program（2011BAJ09B02）
Corresponding author：Associate professor Gong Yongzhi．E-mail: gyzh@yahoo.cn
Citation：Ding Faxing, Fu Lei, Gong Yongzhi，et al．Behavior of concrete-filled square steel tubular stub columns under axially compressive loading［J］. Journal of Shenzhen University Science and Engineering, 2014, 31（6）: 583-592.（in Chinese）
基金项目：国家自然科学基金资助项目（50908230）；国家科技支撑计划资助项目（2011BAJ09B02）
作者简介：丁发兴（1979—），男（回族），浙江省瑞安市人，中南大学教授、博士． E-mail：dinfaxin@mail.csu.edu.cn
引文：丁发兴，付磊，余志武，等．方钢管混凝土轴压短柱的力学性能研究［J］. 深圳大学学报理工版，2014，31（6）：583-592.
更新日期/Last Update: 2014-10-29