S-Clip箍筋约束混凝土轴心受压短柱三维有限元分析

Three-dimensional FEM Analysis of RC Column Confined by S-Clip Stirrups Under Axial Compression

基于提高钢筋混凝土短柱抗震性能的要求,采用复合箍筋使得配筋量加大,施工质量不易保证.一种新型配筋方式S-Clip箍筋,可大大简化施工工序,确保施工质量.目前已有大量试验验证该种配筋形式的有效性,鉴于试验的局限性,本文应用三维有限元分析软件COM3D对S-Clip箍筋约束混凝土柱的轴心受压性能进行了分析,分析了混凝土强度等级、纵筋配筋和箍筋配置方式对箍筋约束混凝土柱力学性能的影响,以进一步研究S-Clip箍筋的性能,为工程设计与应用提供参考.

Composite stirrups improve the seismic performance of reinforced concrete short col- umns, but the construction quality is not easy to guarantee due to high ratio of reinforcement ratio. S-shaped stirrup is developed to simplify the construction course, and keep the construction quality. The effectiveness of S-Clip stirrup has been verified by many experiments. Realizing the limitations of the experiment, this paper adopts three-dimensional finite element （FE） analytical software COM3D to analyze the axial compressive property of S-Clip stirrup, and also the influencing factors of mechanical properties of confined concrete column with different strength grades of concrete, and the ratios of longitudinal reinforcement and stirrup forms. The purpose is to get more knowledge of the S-Clip performance, and provide the basis for engineering design and application.