双层钢管混凝土短柱轴压性能有限元分析
Finite Element Analysis of the Axial Compression Behavior of Double-layer Concrete-filled Steel Tube Short Columns
李大东 1雷劲松 1董志勇 1赵杰1
作者信息
- 1. 西南科技大学土木工程与建筑学院,绵阳 621010
- 折叠
摘要
为深入探究双层钢管混凝土短柱在轴压作用下的承载性能,研究采用ABAQUS有限元分析软件,采用韩林海本构,构建了 14个双层钢管混凝土试件的受压承载分析模型.从合理选择本构模型、单元类型、网格划分、钢管与混凝土的接触模式、有限元计算方法等方面进行了研究,建立了合理、高效的有限元计算模型.研究发现,提高核心混凝土强度等级可有效增强试件轴压承载能力.调整内外钢管径厚比也能提升初始刚度和承载能力,外管调整效果更显著.空心率增加导致承载能力递减,空心率达0.6时,承载能力大幅降低.
Abstract
To investigate the bearing capacity of double-layer steel tube concrete short columns under axial compres-sion,this study used the ABAQUS finite element analysis software and the Han Linhai constitutive model to build a com-pression bearing analysis model for 14 double-layer steel tube concrete specimens.This study conducted research on selec-ting the constitutive model,element type,mesh division,contact mode between the steel tube and concrete,and finite ele-ment calculation methods to establish a reasonable and efficient finite element calculation model.The study found that in-creasing the strength grade of the core concrete can effectively enhance the axial compression bearing capacity of the speci-mens.Adjusting the diameter-thickness ratio of the inner and outer steel tubes can also improve the initial stiffness and bearing capacity,with the outer tube showing more significant effects.Increasing the hollow ratio leads to a decrease in bearing capacity,and the bearing capacity drops significantly when the hollow ratio reaches 0.6.
关键词
双层钢管组合结构/空心率/轴压承载力/有限元分析Key words
double steel pipe composite structure/hollow ratio/axial compression capacity/finite element analy-sis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据