宽肢组合异形柱-钢梁翼缘加强型节点受力性能有限元分析

Finite element analysis on mechanical behavior of flange reinforced connections between wide-flange specially shaped composite columns and steel beams

利用Solid Works建立宽肢组合异形柱-钢梁翼缘加强型节点的参数化模型,采用ABAQUS软件进行变参数分析。模型与试验边界条件及相关参数相同,模拟结果与试验吻合较好,验证了计算方法的可靠性。进而分析加强件几何参数对节点刚度、承载力、塑性区和延性的影响。研究表明:加强件改为三角板能够达到试验中梯形板相同的效果,将加强板的位置由翼缘侧边连接改为在翼缘里面连接可作为处理柱肢截面与钢梁翼缘等宽时节点加强的方式,改为圆弧形具有更好的变形性能;加强板的长度可取为1.0~1.2倍的钢梁高度,宽度可取1/4~1/3的钢梁高度,厚度可取为1.2倍钢梁翼缘的厚度。

With the software Solid Works,a parametric model for steel beam to wide-flange specially shaped composite column flange reinforced connection was established,and the models with varying parameters were analyzed by finite element analysis software ABAQUS. The results are in good agreement with the experimental ones using the same the boundary conditions and the related parameters as the experiment,and the reliability of the calculation method was verified. And then the influence of the geometric parameters of the reinforcing plate on the stiffness,bearing capacity,plastic zone and ductility of the joints were analyzed. The analysis results show that the triangle reinforcing plate can achieve the same effect as the trapezoidal reinforcing plate,the method of by changing the position of the reinforcing plate on the side connection of the flange to the inside connection of flange can be used as the way to reinforce the joint for the cross section of the column and the flange of the steel beam with the same width,and the arc type has better deformation performance. The length of the reinforcing plate is 1 to 1. 2 times higher than that of the steel beam,the width may be 1/4 to 1/3 height of steel beam,and the thickness may be 1. 2 times the steel beam flange thickness.