自密实轻骨料钢管混凝土柱力学性能有限元分析  

Finite element analysis of mechanical properties of self-compacting lightweight aggregate concrete-filled steel tube columns

作　　者：何林峰 吴辉琴[1] 胡强[1] 李佳成 朱真 刘星池 HE Linfeng;WU Huiqin;HU Qiang;LI Jiacheng;ZHU Zhen;LIU Xingchi(School of Civil Engineering and Architecture,Guangxi University of Science and Technology,Liuzhou 545006,China)

机构地区：[1]广西科技大学土木建筑工程学院,广西柳州545006

出　　处：《广西科技大学学报》2023年第3期38-44,共7页Journal of Guangxi University of Science and Technology

基　　金：广西重点研发计划项目(桂科AB19259011);柳州市优势传统产业与重点新兴产业科技计划项目(2020GBCA0403);广西自然科学基金项目(2020GXNSFAA159150);广西科技大学博士启动基金项目(校科博17Z12)资助。

摘　　要：为深入研究自密实轻骨料钢管混凝土柱的力学性能,探讨偏心距、套箍系数、长细比等参数对自密实轻骨料钢管混凝土柱力学性能的影响规律,应用ABAQUS有限元软件对已完成的自密实轻骨料钢管混凝土柱轴压试验进行非线性分析,验证模型的有效性,建立了不同参数下的构件模型。结果表明分析结果与试验结果吻合良好:构件的承载力随着偏心距的增大而大幅度下降;长细比对构件的承载力影响相对于套箍系数略大;加载初期,钢管对混凝土的约束作用不明显,达到峰值荷载后,构件在1/2高度处的环向应力迅速增加,钢管对混凝土有显著的约束作用;构件的破坏类型均属于失稳破坏。To study the mechanical properties of self-compacting-lightweight aggregate-concrete-filled steel tube columns(SLCST)and explore the effect of eccentric distance,hoop coefficient and slenderness ratio on the mechanical properties of SLCST,ABAQUS finite element software is used to carry out nonlinear analysis on the completed axial compression test of SLCST,verify the effectiveness of the model and establish the component model under different parameters.The results show that the analytical results are in good agreement with the experimental results:The bearing capacity of the component decreases significantly with the increase of eccentric distance;The slenderness ratio has a greater effect on the bearing capacity than the hoop coefficient;At the beginning of loading,the steel pipe has a weak constraint effect on concrete,after the peak loading,the hoop stress at 1/2 height of the component increases rapidly,and the steel pipe has a significant constraint effect on concrete hoop;The failure types of components all belong to instability failure.

关 键 词：自密实混凝土 轻骨料混凝土 钢管混凝土柱 承载力 偏压 

分 类 号：TU528.2[建筑科学—建筑技术科学]