Research on axial load distribution method at anchor point and uplift bearing performance of pile–anchor foundations
Description
Table "Figure 7" records the comparative load-displacement data at the anchor loading point under axial uplift. It consists of two groups: "Numerical analysis" from 3D finite element simulation and "Theoretical analysis" from the proposed analytical method. This dataset can be used to evaluate the overall uplift stiffness and ultimate bearing capacity, as well as to verify the theoretical model. Table "Figure 8" presents the dynamic load distribution between the upper and lower pile segments at the anchor point during the entire loading process. It lists the load sharing coefficients of the upper segment (compression/heave) and the lower segment (tension/uplift) as a function of the total load (Load/kN). This dataset demonstrates the nonlinear variation of distribution coefficients, allowing for the analysis of internal force redistribution and asynchronous mobilization of shaft resistance. Table "Figure 9" provides the distribution of pile axial force (kN) and shaft friction (kPa) versus depth (m) under a specific uplift load. It clearly highlights the distinct mechanical behavior bounded by the anchor point: the upper segment is under compression (axial force decreasing upward with upward friction), while the lower segment is under tension (axial force decreasing downward).Table "Figure 10(a)" and table "Figure 10(b)" provide the load-displacement response data at different key positions along the pile shaft to elaborate on the elastic long pile effect and structural deformation characteristics. Figure 10(a) contains the displacement responses from numerical simulation at the pile head, theoretical calculation, and at a distance of 0.2L from the loading point. Figure 10(b) further includes the numerical response at the pile tip.Table "Figure 11(a)(c)" and table "Figure 11(b)(d)" provide the pile internal force profiles under an intermediate load of 5000 kN, comparing two extreme boundary conditions: "Pile-head loading" and "Pile-tip loading". Figure 11(a)(c) captures the responses under pile-head loading, where the axial force and shaft resistance attenuate downward from the pile head. Conversely, Figure 11(b)(d) records the data for pile-tip loading, where the internal forces diminish upward from the pile tip.Table "Figure 12" refines the influence of uplift loads (kN) on the stress states of different pile segments based on a specific analytical model case. It tracks the evolution of the "load sharing coefficient for upper pile segment (heave)" and the "load sharing coefficient for lower pile segment (uplift)" as the external load escalates.Table "Figure 13" encapsulates the relationship between the total uplift load (kN) and the load sharing coefficients of the upper and lower segments under three different anchor design depths (5 m, 10 m, and 15 m). The data indicates that as the anchoring depth increases, the longer upper segment leads to higher axial stiffness, making the load sharing exhibit distinct asymmetric evolution and transfer.