钢筋混凝土桥墩纵筋屈曲解析方法

Analytical Method for Buckling of Longitudinal Reinforcement for RC Bridge Piers

为了评估钢筋混凝土桥墩的极限水平位移 ,根据塑性铰区变形特性 ,合理的确定塑性铰区长度是非常重要的。笔者基于有限元分析从理论 ,给出了桥墩根部纵筋屈曲时的长度 ,并与实验结果进行比较 ,通过纵筋屈曲分析结果 ,考虑到材料非线性屈曲程度 ,进一步提出了桥墩纵筋屈曲长度的简化表达式。

In order to assess the ultimate displacement of reinforced concrete columns based on the deformation characteristics in plastic hinge region, it is of great importance to determine rationally the plastic hinge length. The analytical studies on buckling of longitudinal reinforcement in columns by FEM analysis are presented and compared with the theoretical buckling length obtained from the column loading tests. Furthermore, the simplified procedure for assessing the buckling length of longitudinal reinforcement taking account of the nonlinear behavior is proposed based on analytical studies.