内置薄壁钢管混凝土叠合柱轴压性能有限元分析  

Finite element analysis of axial compression performance of built-in thin-walled concrete-filled steel tube composite column

作　　者：韩东吉 陶忠[1] 涂家祥 HAN Dongji;TAO Zhong;TU Jiaxiang(College of Architecture and Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650500

出　　处：《四川建筑科学研究》2023年第1期28-34,共7页Sichuan Building Science

基　　金：云南省科技厅重点专项(202003AC100001)。

摘　　要：为降低成本和合理化利用材料的性能,提出了一种内置薄壁钢管混凝土叠合柱。在采用有限元软件ABAQUS对该柱进行有限元模拟时,将钢管外混凝土划分为2部分,分别给予不同的本构关系,用以保证有限元模型的精确性;通过有限元模拟分析,研究了混凝土强度等级、径宽比、径厚比,以及钢管屈服强度对内置薄壁钢管混凝土叠合柱力学性能的影响。结果表明,混凝土强度等级以及径宽比对构件力学性能影响较大。In order to reduce costs and rationalize the performance of materials,a built-in thin-walled concrete-filled steel tube composite column was proposed.When the finite element software ABAQUS was used to simulate the column in this paper,the concrete outside the steel tube was divided into two parts and given different constitutive relations to ensure the accuracy of the finite element model.The influence of concrete strength grade,diameter-towidth ratio,diameter-to-thickness ratio and yield strength of steel tube on the mechanical properties of built-in thinwalled concrete-filled steel tube composite columns was studied through the finite element analysis.The results show that the strength grade of concrete and the diameter-to-width ratio have a great influence on the mechanical properties of members.

关 键 词：薄壁钢管 有限元 CDP模型 承载力 延性 参数分析 

分 类 号：TU398.9[建筑科学—结构工程]