Generalized nonlinear model describing softening and hardening behaviors of skin friction for axially loaded piles
Generalized nonlinear model describing softening and hardening behaviors of skin friction for axially loaded piles
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DOI：
10.1016/j.compgeo.2019.103196
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发表时间：
2019-12
影响因子：
5.3
通讯作者：
Ling-Yu Xu;F. Cai;Jingwen Pan;Ying-ying Xue
中科院分区：
文献类型：
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作者：
Ling-Yu Xu;F. Cai;Jingwen Pan;Ying-ying Xue
本研究提出一个新的广义非线性模型，以提供一个连续的描述在整个非线性区域的荷载传递曲线，包括软化和硬化现象。通过实测桩侧摩阻力和桩土相对位移的计算关系与现有非线性软化模型的计算关系的比较，验证了GN模型的适用性。此外，建议的GN模型在轴向受荷桩沉降分析的有限元程序中实现。结果表明，GN模型是双曲线模型和现有广义非线性软化模型的推广，能够覆盖轴向荷载桩侧摩阻力-位移数据的广泛变化。
This study proposes a new generalized nonlinear (GN) model to provide a continuous describing in the whole nonlinear regime of load-transfer curves, including both softening and hardening phenomenon. The applicability of the proposed GN model is verified by comparing the calculated relation between the skin friction and relative pile-soil displacement of axially loaded piles with measurements and those calculated by existing nonlinear softening models. Moreover, the proposed GN model is implemented in a finite element program for settlement analysis of axially loaded piles. The results indicate that the proposed GN model can be considered as a generalization of a hyperbolic model and an existing generalized nonlinear softening model and is expected to cover a wide range of variations in skin friction-displacement data of axially loaded piles.