楼板对高层钢框架-R.C剪力墙结构性能的影响

针对结构中的钢框架,采用稳定函数单元模型、空间屈服面方程及塑性流动法则,建立了钢框架结构节点的弹塑性增量平衡方程;针对结构中的楼板,应用相互耦合的三角形平面应力单元与三角形薄板弯曲单元,构建了楼板节点的弹性增量平衡方程;针对结构中的钢筋混凝土剪力墙,利用等效梁单元模型,采用一种简化的刚度法,得到了钢筋混凝土剪力墙结构节点的弹塑性增量平衡方程。经过组合,求得混合结构节点整体的弹塑性增量平衡方程。最后,通过数值算例,得到了该类结构中外钢框架的作用随着楼板厚度的增加而加大的结论。

Effects of Floor Slab on High-Rising Hybrid Structure Performance

The elastic-plastic increment equilibrium equation of the node in the steel frame is obtained by using the stability function element,the space yield surface equation and the plastic flow rule.The R.C shear wall is also constructed by employing the equivalent beam element and the simplified stiffness method.The elastic increment equilibrum equation of the node in the floor slab is established by the combined triangle element for interactions of the in-plane stress triangle element and the out-plane bending triangle element. As a result,the global elastic-plastic increment equilibrium equation for the hybrid structure is formulated.Finally,a numerical example shows that with the increase of the floor thickness the outer steel frame shares more proportion of total horizontal forces applied on the structure.