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Limit load of strip anchors in uniform cohesive-frictional soil

机译：均匀黏性摩擦土中条形锚的极限载荷

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摘要

The conventional approaches for determination of pullout capacity factors of anchor foundation are restricted for only cohesionless or cohesive soils. These approaches are incompetent for the estimation of the anchor capacity in soils that have both cohesion and frictional resistance - a common scenario of native soils. In this study, a rigorous nonlinear Finite Element (FE) analysis is carried out to evaluate the pullout capacity factors N-c, N-q and N-gamma of strip anchor based on the contribution of cohesion (c), surcharge (q), and self-weight (gamma) of soil. Before conducting detail parametric studies, the numerical outcomes of current finite element studies are validated with the existing experimental and numerical results. Numerical results reveal that N-c changes from nonlinear to linear fashion with the increase of friction angle for altering anchor orientation from horizontal to vertical, while a reversible nature is found for N-q and N-gamma. The results of these analyses are provided as design equations for the convenience of design engineers as a function of anchor embedment depth (H/B), friction angle (phi), and the inclination angle (beta). Finally, a roughness modification factor N-c, N-q and N-gamma for the vertical anchor is proposed.
机译：确定锚固基础抗拉能力因子的常规方法仅适用于无粘性或粘性的土壤。这些方法不适合估算具有内聚力和摩擦阻力的土体的锚固能力-这是天然土的常见情况。在这项研究中，基于内聚力（c），附加力（q）和自粘性的影响，进行了严格的非线性有限元（FE）分析，以评估条形锚的拉拔承载力因子Nc，Nq和N-γ。土壤的重量（γ）。在进行详细的参数研究之前，将使用现有的实验和数值结果验证当前有限元研究的数值结果。数值结果表明，随着摩擦角的增加，N-c从非线性方式变为线性方式，从而将锚定方向从水平方向改变为垂直方向，而N-q和N-γ具有可逆性。这些分析的结果作为设计方程式提供，以方便设计工程师根据锚固埋深（H / B），摩擦角（phi）和倾斜角（beta）进行选择。最后，提出了垂直锚固件的粗糙度修正因子N-c，N-q和N-γ。

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