PHC管桩抗剪承载力模拟分析

Simulation analysis on shear strength of PHC pile

基于ABAQUS软件,对PHC管桩的抗剪性能进行了非线性数值模拟,比较了管桩在不同螺距及箍筋构造形式下的受力特征,将模拟得出的结果与预应力混凝土管桩图集10G409所提供的剪力和理论计算值进行了对照,结果表明:采用的模型参数是可靠的。随着管桩螺距的减小,其抗剪承载力有不同程度的提高,管桩在开裂前受力性状基本一致,但进一步受力时却表现出较大的差别。当管桩的箍筋采用不同的构造形式时,其抗剪效果也不相同。

Based on the ABAQUS software, the non-linear numerical simulation of the shear capacity of PHC pipe pile was carried out.The shear behavior of concrete pipe piles under different pitch and structure is compared.The shear force and ultimate shear force obtained by non-linear simulation are compared with the shear force and the theoretical calculation provided by Atlas 10G409 of pre- stressed concrete pipe pile.The results show that the model parameters used in this experiencement are reliable.With the decrease of the pitch of the pipe pile, the shear bearing capacity of the pile is improved to some extent.The stress behavior of the pipe piles is basically the same before cracking, but the stress of the pipe piles shows a great difference.When the pipe pile with different structure form of stirrups, the shear will play a different effect.