The influence of load pattern and Poisson’ s ratio effect on the pullout performance of the anchor bolt, which were connected with pipe pile by core concrete, were investigated by three anchorage-beam pullout tests and one self-balanced pullout test. Theoretical and finite element analysis were also employed to explore the influence of load pattern and Poisson’ s ratio effect on the ultimate friction at the pipe-core-concrete contact surface. The results show that the load pattern and Poisson’ s ratio effect of pipe pile have a great influence on the pullout characteristics of the anchor bolt. The maximum relative displacements between core concrete and pipe pile and between anchor bolt and core concrete in self-balanced pullout test are 0.913 mm and 0.935 mm, respectively, which are significantly greater than that in anchorage-beam pullout test where the displacements are 0.292 mm and 0.500 mm, respectively. In the self-balanced test, the pipe pile is under compression and expands radially due to the Poisson’ s ratio effect. In the anchorage-beam test, on the contrary, the pipe pile is under tension and shrinks radially. As a consequence, the ultimate friction between core concrete and pipe pile in the anchorage-beam test is higher than that in the self-balanced test by 15.1% to 28.7%. Accordingly, the results of anchorage-beam pullout test are more sensible for the anchor bolt design.

通过3次锚固梁拉拔试验和1次自平衡拉拔试验，研究了荷载型式和泊松比效应对芯混凝土与管桩连接的地脚螺栓拉拔性能的影响。理论和有限元分析也被用来探讨载荷模式和泊松比效应对管芯与混凝土接触面极限摩擦的影响。结果表明，管桩的荷载模式和泊松比效应对锚杆的拉拔特性有很大的影响。自平衡拉拔试验中，芯混凝土与管桩之间，锚栓与芯混凝土之间的最大相对位移分别为0.913 mm和0.935 mm，分别比位移分别为0.292毫米和0.500毫米的锚定梁拉拔试验大得多。在自平衡测试中，由于泊松比效应，管桩处于受压状态并径向膨胀。相反，在锚定梁测试中，管桩承受拉力并径向收缩。结果，在锚固梁测试中，核心混凝土与管桩之间的极限摩擦比自平衡测试中的极限摩擦高15.1％至28.7％。因此，锚固梁拉拔试验的结果对锚杆的设计更为合理。管桩受拉并径向收缩。结果，在锚固梁测试中，核心混凝土与管桩之间的极限摩擦比自平衡测试中的极限摩擦高15.1％至28.7％。因此，锚固梁拉拔试验的结果对锚杆的设计更为合理。管桩受拉并径向收缩。结果，在锚固梁测试中，核心混凝土与管桩之间的极限摩擦比自平衡测试中的极限摩擦高15.1％至28.7％。因此，锚固梁拉拔试验的结果对锚杆的设计更为合理。