圆管与工字钢混合空间管节点非线性承载分析

Nonlinear strength analysis of multiplanar tubular joints between I-beam and hollow circular sections

以圆钢管为主管而以工字钢为支管的结构是一种新颖的钢管结构 ,其节点受力非常复杂 ,为了便于设计计算 ,有必要深入研究其承载性能。在应用非线性有限元法对圆管与工字钢混合空间管节点的承载性能进行分析时 ,采用四边形等参壳元来构造管节点的几何和材料非线性有限元模型 ,采用自动步长增量法来进行迭代计算 ,其中 ,有限元求解是通过 ADINA软件来完成的。通过分析大量算例 ,并对所得结果进行回归 ,得到了管节点在轴心受力和平面外受弯两种荷载条件下的极限承载力公式。最终结果对管节点的理论分析及工程实践均有指导作用 ,并且在新加坡 MEGA展览中心工程中得到了应用 。

New steel structures are being designed with circular tubes as the chords and square tubes as the braces. However, the joint stress in this structure is very complex so numerical analysis of the joint loading capacity is needed to design the structure. Nonlinear finite element analysis (FEA) was used to analyze the multiplanar tubular joint between I beam and hollow circular sections. A four node general quadrilateral shell element was used for the nonlinear geometric and material analyses in the finit...