预应力混凝土扁梁框架中节点有限元分析

Finite Element Analysis of Prestressed Concrete Wide-flat Beam Frame inner Joint

通过对4个预应力混凝土扁梁框架中节点试件进行有限元数值模拟,考虑节点区预应力筋穿柱与否作为影响因素,分析了节点核心区混凝土拉应变以及箍筋拉应力的变化情况。结果表明,预应力提高了节点核心区混凝土的抗剪承载力,而预应力筋水平位置变化对节点的抗剪强度影响很小。

Based on finite element analysis, we investigated four joints of prestressed concrete flat-beam frame inner joint considering prestress tendon wearing column or not. Moreover, the changing of the tensile strain of concrete and the tensile stress of stirrups in the core were also analyzed. The results show that prestress can improve the shear strength of concrete joint in the core, but the location of prestressing tendon have a little influence on the shear strength of joint.