方中空夹层钢管混凝土柱-钢梁单边螺栓连接节点静力性能有限元分析

Finite Element Analysis of Static Performance of Square Concrete Filled Double Skin Steel Tubular Column-steel Beam Blind Bolted Joints

为了研究方中空夹层钢管混凝土柱-钢梁单边螺栓连接节点的静力性能,为工程的应用和进一步理论研究提供参考,利用ABAQUS有限元软件,建立此类节点的数值模型,并采用已有的试验结果验证模型的准确性。选取钢梁屈服强度、钢柱屈服强度、组合柱空心率、组合柱长细比、柱截面含钢率、螺栓直径、端板厚度和螺栓预拉力等参数,分别从节点极限承载力和初始刚度两方面进行对比分析。结果表明:单调荷载作用下,该类节点核心区的极限承载力随着钢梁屈服强度、组合柱钢管屈服强度、柱长细比、螺栓直径、端板厚度和螺栓预拉力的增大而增大,随着柱空心率的增大而减小;初始刚度随着柱含钢率和端板厚度的增大而增大,随着柱空心率的增大而减小。

In order to study the static performance of the square concrete filled double skin steel tubular column-steel beam blind bolted joints,and to provide references for engineering applications and further theoretical research,this paper uses the ABAQUS finite element software to establish a numerical model of such joints,and uses the existing test results verify the accuracy of the model.Select steel beam yield strength,steel column yield strength,composite column hollow ratio,composite column slenderness ratio,column section steel ratio,bolt diameter,end plate thickness and bolt pretension and other parameters to compare and analyze the ultimate bearing capacity and initial stiffness of joints.The results show that under monotonic load,the ultimate bearing capacity of the core area of this type of joints increases with the increase of the steel beam yield strength,composite column steel tube yield strength,column slenderness ratio,bolt diameter,end plate thickness and bolt pretension,and decrease as the column hollow rate increases;the initial stiffness increases with the increase of column steel content and end plate thickness,and decreases with the increase of column hollow rate.