摘要
为研究矩形截面钢管混凝土构件压扭和弯扭的力学性能,使用ABAQUS有限元分析软件建立构件力学模型,计算20个圆形和方形截面的钢管混凝土构件压扭和弯扭的数据,并将其与实验结果进行比较。利用典型算例分析材料参数、几何参数和加载参数对矩形钢管混凝土构件压扭、弯扭力学性能的影响。结果表明:在材料参数和几何参数条件相同的情况下,轴压比和弯矩比的增加都会使构件极限承载力降低;在几何参数和加载参数条件相同的情况下,钢材强度和截面含钢率的提高可以增加压扭与弯扭构件的极限承载力;在材料参数和加载参数条件相同的情况下,长细比影响压扭构件稳定性,对细长构件极限承载力影响较大。最后,依据相关分析,给出矩形钢管混凝土构件压扭和弯扭极限承载力的简化计算公式。
In order to study the mechanical properties of compression-torsion and bending-torsion of concrete-filled steel tubular members with rectangular cross-section,the mechanical model of the members was established by using ABAQUS finite element analysis software.The compression-torsion and bending-torsion data of 20 circular and square cross-section concrete-filled steel tubular members were calculated and compared with the experimental results.The effects of material parameters,geometric parameters and loading parameters on the compression-torsion and bending-torsion mechanical properties of concrete-filled rectangular steel tubular members are analyzed by typical examples.The results show that under the same conditions of material parameters and geometric parameters,the increase of axial compression ratio and bending moment ratio will reduce the ultimate bearing capacity of the component;under the same conditions of geometric parameters and loading parameters,the increase of steel strength and section steel ratio can increase the ultimate bearing capacity of compression-torsion and bending-torsion members.Under the same conditions of material parameters and loading parameters,the slenderness ratio affects the stability of compression-torsion members and has a great influence on the ultimate bearing capacity of slender members.Finally,based on the correlation analysis,a simplified calculation formula for the ultimate bearing capacity of concrete-filled rectangular steel tubular members under compression-torsion and bending-torsion is given.
作者
陈宇超
CHEN Yu-chao(School of Urban Construction,Liaodong University,Dandong 118003,China)
出处
《辽东学院学报（自然科学版）》
CAS
2023年第3期186-197,共12页
Journal of Eastern Liaoning University:Natural Science Edition
关键词
矩形钢管混凝土
压扭
弯扭
有限元分析
concrete-filled rectangular steel tube
compression-torsion
bending-torsion
finite element analysis
