Abst'/> Quasi-static p-y hysteresis loop for cyclic lateral response of pile foundations in offshore platforms
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Quasi-static p-y hysteresis loop for cyclic lateral response of pile foundations in offshore platforms

机译：准静态p-y磁滞回线，用于海上平台桩基础的周期性横向响应

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AbstractPile foundations of the coastal and offshore structures always have strong nonlinear response due to marine environmental loads. Derived from the specific hyperbolicp-ycurve and the soil stiffness degradation with the average shear strain, the quasi-staticp-yhysteresis loop is modeling to develop the BNWF approach for analysis of the soil-pile interaction under low cycle number and irregular cyclic loads. The hysteresis loop simulates various important features, such as the soil-pile nonlinearity, the soil degradation, and the soil-pile gap formation. The developed hysteresis loop is consisted of the elastoplastic and drag-gap components, which the elastoplastic component simulates the nonlinear characteristics of soil-pile system and the gap-drag component considers the repeated separation and closure effects of the soil-pile interface. As the quasi-staticp-yhysteresis loop subjects to the constant, variable and mixed amplitude displacement loadings, loop patterns can reflect the reasonable soil-pile interaction mechanism correctly, including the soil-pile separation and the soil degradation. Thep-yhysteresis loop shape reflects the trend of irregular loads and the soil-pile gap affects the pattern of the hysteresis loop. The developed quasi-staticp-yhysteresis loop incorporated in the generalized BNWF method to analyze the soil-pile interaction under the cyclic loads.Hightlights•A developed hysteresis loop is derived from the hyperbolic p-y curve and soil degradation.•The loop composed of elastoplastic and drag-gap component reflects soil-pile interaction.•The developed BNWF is to analyze soil-pile interaction under irregular cyclic loads.
机译： 摘要 由于海洋环境负荷，沿海和近海结构的桩基始终具有很强的非线性响应。源自特定的双曲线 p - y 曲线和土壤刚度随平均剪切应变的降低，准静态 p - y 磁滞回线用于开发BNWF方法，以分析低循环次数和不规则循环荷载下的土-桩相互作用。磁滞回线模拟了各种重要特征，例如土桩非线性，土体退化和土桩间隙形成。发达的磁滞回线由弹塑性和拖曳间隙组成，弹塑性分量模拟了土-桩系统的非线性特征，而间隙-拖曳分量考虑了土-桩界面的反复分离和闭合效应。由于准静态 p - y 磁滞回线会经受恒定，可变和混合振幅位移载荷，因此回波模式可以反映出合理的正确的土-桩相互作用机理包括土-桩分离和土壤退化。 p - y 滞后回线形状反映了不规则载荷的趋势，土桩间隙影响了滞后回线的模式。发达的拟静力 p - y 磁滞回线被纳入广义BNWF方法中，以分析循环荷载下的土-桩相互作用。 车灯 • 一个发达的磁滞回线是源自双曲线py曲线和土壤退化。 • 由弹塑性和拖动间隙组成的循环反映了桩土相互作用。 • 开发的BNWF用于分析不规则循环载荷下的土-桩相互作用。

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