不同直径的加强环对管桩延性的影响分析

Influence of different diameter of reinforcing ring on the ductility of pipe pile

对设有加强环的PHC管桩与普通PHC管桩进行了水平往复循环加载试验,并做了荷载-位移滞回曲线分析,试验结果表明有加强环的PHC管桩的延性比普通PHC管桩有明显的提升。通过ABAQUS软件分析不同外径下的加强环对管桩与承台节点处延性的影响,通过在管桩与承台节点处设置五组不同外径的加强环,分别分析节点处的荷载-位移滞回曲线,从而分析不同外径的加强环对管桩延性的影响。分析结果表明,不同外径的加强环对管桩的作用效果不同,随着外径的增加,其管桩水平抗弯和抗剪能力也在提高。

With a ring of PHC pipe pile and PHC pipe pile to strengthen the horizontal cyclic loading experiment,and the load displacement hysteretic curves analysis.The test results show that strengthen the ductility of the PHC pile to the ring than the ordinary PHC pipe pile has improved significantly.By using ABAQUS software to analysis different diameters of strengthening effect of ring of pipe pile and pile cap node ductility,by five groups of different diameters of the stiffening ring,respectively,analysis of node load displacement hysteretic curves, so as to analyze the different diameters of the reinforcement effect of ring on the ductility of pipe pile is arranged in the pipe pile and pile cap at a node.The results show that the effect of different diameter of reinforcing ring on the pipe pile is different,with the increase of outside diameter, the horizontal bending and shear capacity of pipe pile is also improved.