不同截面中空夹层钢管混凝土中长柱偏压分析  

Bias analysis of medium and long columns of concrete filled double skin steel tube with different cross-sections

作　　者：刘海成[1] 辛雨泽 Liu Haicheng;Xin Yuze(Shenyang Jianzhu University,Shenyang Liaoning 110000,China)

机构地区：[1]沈阳建筑大学,辽宁沈阳110000

出　　处：《山西建筑》2024年第19期39-43,共5页Shanxi Architecture

基　　金：装配式FRP-海洋混凝土结构多因素影响下性能增强增韧机理研究(项目批准号:52378253)。

摘　　要：为探究方套方、方套圆截面中空夹层钢管混凝土中长柱偏压受力性能,利用ABAQUS有限元软件,创建方套方、方套圆两种截面中空夹层钢管混凝土中长柱有限元模型,以长细比、偏心距、核心混凝土强度、外钢管含钢率、内钢管含钢率作为变化参数,对上述两种截面中空夹层钢管混凝土中长柱进行偏压受力分析。对比分析了不同截面中空夹层钢管混凝土中长柱的荷载-跨中挠度曲线、压弯承载力、初始刚度的变化。研究结果表明:方套方、方套圆截面中空夹层钢管混凝土中长柱的极限承载能力,初始刚度随长细比,偏心距的增大而减小,随核心混凝土强度等级,内、外钢管含钢率的提高而增大;偏心距、核心混凝土强度、外钢管含钢率对方套方、方套圆截面中空夹层钢管混凝土中长柱的极限承载能力影响较大;长细比、核心混凝土强度对方套方、方套圆截面中空夹层钢管混凝土中长柱的初始刚度影响较大;相同条件下,方套圆截面中空夹层钢管混凝土中长柱受力性能优于方套方截面。In order to explore the bias and compressive performance of concrete filled double skin steel tube in square and square circle sections,the ABAQUS finite element software was used to create a finite element model of concrete filled double skin steel tube in square and square circle,and the bias force analysis was carried out on the long columns of concrete filled double skin steel tube with two cross-sections,including slenderness ratio,eccentricity,core concrete strength,steel content of outer steel pipe and steel content of inner steel pipe.The changes of load-mid-span deflection curves,compression-bending bearing capacity and initial stiffness of concrete filled double skin steel tube with different cross-sections were compared and analyzed.The results show that the ultimate bearing capacity and initial stiffness of the concrete filled double skin steel tube in the square and square round cross-sections decrease with the increase of slenderness ratio and eccentricity,and increase with the increase of the strength grade of the core concrete and the steel content of the inner and outer steel pipes.The eccentricity,core concrete strength and steel content of the outer steel pipe have a great influence on the ultimate bearing capacity of the concrete filled double skin steel tube in the square and square round sections.The slenderness ratio and the strength of the core concrete have a great influence on the initial stiffness of the long columns in the concrete filled double skin steel tube of the square and square round sections.Under the same conditions,the mechanical performance of the concrete filled double skin steel tube in the square sleeve circular section is better than that of the square sleeve square section.

关 键 词：中空夹层钢管混凝土 中长柱 偏压性能 数值分析 

分 类 号：TU398.7[建筑科学—结构工程]