圆钢管混凝土悬臂长柱压弯剪性能研究  

RESEARCH ON THE BENDING-SHEAR BEHAVIOR OF CANTILEVER CONCRETE-FILLED CIRCULAR STEEL TUBULAR LONG COLUMNS

作　　者：艾宪仓 王忠东 李栋林 王生贵 奚增红 杨俊芬[3] AI Xiancang;WANG Zhongdong;LI Donglin;WANG Shenggui;XI Zenghong;YANG Junfen(Economic Technology eering, Xi＇an University of Architecture ＆ Technology, Xi＇an 710055,China;China Energy Constructio Group, Gansu Electric Power Design Institute Co. Ltd, Lanzhou 730050, China;School of Civil Engin Research Institute, Gansu Electric Power Corporation, Lanzhou 730050, China)

机构地区：[1]国网甘肃省电力公司经济技术研究院,兰州730050 [2]中国能源建设集团甘肃省电力设计院有限公司,兰州730050 [3]西安建筑科技大学土木工程学院,西安710055

出　　处：《工业建筑》2018年第3期156-164,共9页Industrial Construction

基　　金：国家电网公司2014年依托工程基建新技术研究项目([2014]9)

摘　　要：为了进一步研究各参数对大长细比圆钢管混凝土柱压弯试件受力性能的影响,在试验的基础上,采用非线性有限元软件ABAQUS 6.12分析了轴压比、混凝土强度、钢材选取、含钢率以及柱身弯矩分布等参数对试件的破坏模式、初始刚度、极限承载力等静力性能的影响。分析结果表明：试件轴压比和含钢率的变化能显著影响圆钢管混凝土的承载力;采用C60等级混凝土时,试件的初始刚度、承载力会相应提高;而采用C40级和C50级混凝土时,其承载力等提高并不明显;钢材屈服强度对试件的初始刚度没有明显变化,而其极限承载力有小幅度增加;随着柱顶弯矩的增加,试件的初始刚度和极限承载力均有所下降且下降程度较快;当两个方向所受的力相同时,试件的承载力降低程度最大。In order to study the effects of parameters on the mechanical properties of cantilever concrete-filled circular steel tubular long columns with large slenderness ratio,and on the basis of experiment,the ABAQUS 6. 12 was used to analyze the influence of the axial compression ratio,the strength of concrete and steel,steel ratio and moment distribution on the failure mode,initial stiffness and bearing capacity. The results showed that the axial compression ratio and steel ratio of specimens could significantly affect the bearing capacity. The C60 concrete could improve the initial stiffness and bearing capacity of the specimens,while the C40 and C50 concrete were not improved obviously.The yield strength of steel had little effect on the initial stiffness,while the bearing capacity had increased a little.With the increase of bending moment,the initial stiffness and bearing capacity decreased rapidly. When the two directions of force were the same,the bearing capacity was reduced mostly.

关 键 词：圆钢管混凝土柱 大长细比 静力性能 有限元分析 

分 类 号：TU398.9[建筑科学—结构工程]