摘要
在实际工程中,建筑结构承重柱通常处于同时受到轴向力和水平力的压弯受力状态,本文采用ABAQUS有限元软件以内配十字型钢圆钢管混凝土压弯柱为典型构件,分析了加载路径对其力学性能的影响,讨论了构件的破坏模态、各组成部件的截面应力、应变变化规律,同时提出构件的荷载-挠度关系曲线。结果表明:加载路径对力学性能几乎无影响,整个加载过程中构件大致能保持平截面变形,满足平截面假定,构件的挠度曲线近似为正弦半波曲线。最后对影响组合柱压弯性能的主要因素进行了参数分析,发现长细比对其影响较为显著,可为该类构件压弯承载力计算表达式的简化提供参考。
In actual project,the structure column is usually in compressive and bending performance by bearing axial and horizontal force.This paper presents a finite element model（FEM） of concrete-filled circle steel tubular column with internal profiled steel using the ABAQUS software and the FEM models of typical examples are established.The mechanical performance studies are analyzed,and the loading path,failure modes,stress and strain distribution and the axial load versus displacement curves are calculated.The results show that there is no influence on the loading path,the column can keep flat section deformation during the whole loading process and meet the plane section assumption,it＇s deflection curve conforms to sinusoidal.Parametric studies of concrete-filled circle steel tubular column with internal profiled steel are also performed and found that slenderness ratio of column has significant effects on the bearing capacity,which can provide a reference for the compressive and bending calculation expression of column.
出处
《工程抗震与加固改造》
北大核心
2017年第6期119-126,112,共9页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金项目(51268035)
关键词
内配型钢钢管混凝土
压弯性能
荷载分配
数值模拟
有限元分析
concrete-filled steel tubular member with inner profiled steel
compressive and bending performance
load distribution
numerical simulation
finite element simulation
