预应力拼接式框架节点抗剪性能数值模拟研究

Numerical Simulation Study on Shear Behavior of Prestressed Spliced Frame Joints

列举了国内外装配式混凝土框架节点的常见连接方式,并分析了各连接方式的优势和局限性,重点对预应力拼接式框架节点建立抗剪性能数值模拟,并分析不同钢筋配筋率对抗剪性能的影响。研究结果表明:此类节点破坏主要集中在梁柱交界处,改变抗剪钢筋配筋率能够在一定程度上改善节点的受力性能,建议此类节点抗剪钢筋的配筋率取0.3%~0.5%。

In this paper, the common connection modes of prefabricated concrete frame joints at home and abroad are listed in detail, and the advantages and limitations of each connection mode are analyzed. The numerical simulation of shear performance of prestressed spliced frame joints is emphasized, and the influence of different shear reinforcement ratio on the performance is analyzed. The results show that the failure of this kind of joint is mainly concentrated at the interface of beam and column, and changing the reinforcement ratio of shear reinforcement can improve the mechanical performance of the joint to a certain extent. It is suggested that the reinforcement ratio of shear reinforcement should be between 0.3% and 0.5%.