摘要
为研究多腔T形钢管混凝土柱的轴压性能,开展了7根多腔T形钢管混凝土柱和2根普通T形钢管混凝土柱试件轴压试验研究,主要考察钢管壁厚、混凝土强度和高宽比对多腔T形钢管混凝土柱轴压性能的影响。试验结果表明,与同条件的普通T形钢管混凝土柱相比,多腔T形钢管混凝土柱具有更高的轴压承载力及更好的变形性能。多腔T形钢管混凝土柱的轴压极限承载力随着钢管壁厚增大而显著提高,随着高宽比增大而呈下降趋势;当采用高强混凝土时,应匹配较厚的钢管以更加充分地发挥两种材料的性能。将美国规范ANSI/AISC 360⁃16、欧洲规范Eurocode 4、日本规范AIJ⁃CFT和中国规范GB 50936—2014公式计算与试验的轴压极限承载力进行比较。结果表明,Eurocode 4规范公式的计算精度最高且离散性最小。
In order to study the axial compression behavior of multi cavity T⁃shaped concrete⁃filled steel tubular columns,the axial compression tests of 7 multi cavity T⁃shaped concrete⁃filled steel tubular columns and 2 ordinary T⁃shaped concrete⁃filled steel tubular columns were carried out,and effects of steel tube wall thickness,concrete strength and height⁃width ratio on the axial compression behavior of multi cavity T⁃shaped concrete⁃filled steel tubular columns were mainly investigated.The test results show that the multi cavity T⁃shaped concrete⁃filled steel tubular columns provide higher axial compression bearing capacity and better deformation performance than the ordinary T⁃shaped concrete⁃filled steel tubular columns under the same conditions.The axial compression ultimate bearing capacity of multi cavity T⁃shaped concrete⁃filled steel tubular columns increase significantly with the increase of the steel tube wall thickness,and decreases with the increase of the height⁃width ratio.When high⁃strength concrete is used,the thicker steel tube shall be matched to give full play to the properties of the two materials.The axial compression ultimate bearing capacity of the American code ANSI/AISC 360⁃16,the European code Eurocode 4,the Japanese code AIJ⁃CFT and the Chinese code GB 50936—2014 was calculated and compared with the test results.The results show that the Eurocode 4 formula has the highest calculation accuracy and the smallest discreteness.
作者
袁健
黄德强
王靖普
胡壹
YUAN Jian;HUANG Deqiang;WANG Jingpu;HU Yi(College of Civil Engineering,Central South University of Forestry and Technology,Changsha 410004,China)
出处
《建筑结构》
北大核心
2024年第16期8-13,共6页
Building Structure
基金
湖南省教育厅科学研究项目(21A0176),2021年湖南省普通高校青年骨干教师培养计划项目。
关键词
钢管混凝土柱
多腔T形
轴压试验
力学性能
concrete⁃filled steel tubular column
multi cavity T⁃shaped section
axial compression experiment
mechanical behavior
