钢筋混凝土平面问题的含梁组合单元模型

A Beam-embedded Plane Finite Element Model of Reinforced Concrete

将混凝土内的钢筋模拟为能承受轴向力、抵抗弯曲变形的梁单元,在梁元节点位移服从平面单元位移场的基本假设下,应用虚功原理建立了单元内任意位置含钢筋梁元的钢筋混凝土平面组合单元模型.通过与现有钢筋混凝土平面单元模型比较,本模型更准确全面地反映了钢筋的力学性能,钢筋在平面单元内的位置不再有任何限制,混凝土和钢筋可以各自独立地进行网格划分,为单元离散提供了便利.

<Abstrcat> The reinforcing steel bars are regarded as beam elements in concrete plane elements, which can endure axial forces and bear bending. Based on the hypothesis that the displacements of beam nodes are consistent with the displacement field of the plane element, a beam-embedded plane finite element model can be built by employing the virtual work principles. Compared with other applied plane element model, this model describes the structure performances of reinforcements more exactly and generally, and allows them to distribute in the plane element without any restraint. The concrete and reinforcement elements can be meshed independently and this provides convenience for discrete elements.