*2.1. Modeling of Footings*

The sign convention and definition of terminology in this study are plotted in Figure 3 and the numerical models of footings investigated in this study are shown in Figure 4.

The diameter of all the footings is *D* = 15 m and the height of the max area is *H*<sup>t</sup> = 1.75 m. The geometry of the spudcan follows Liu et al. [26] and Yu et al. [27]. The geometry of the skirted footing is *H<sup>s</sup>* = 0.25*D* = 3.75 m and *T*<sup>s</sup> = 1.75 m; where *H<sup>s</sup>* is the height of the skirt and *T*<sup>s</sup> is the thickness of the skirt. The geometry of the fusiform spudcan footing is *D* = 15 m, *H*<sup>1</sup> = 2.5 m and *H*<sup>2</sup> = 3.3 m. The distance from the center of Section 1.1 to the reference point (RP) for flat base footing is *H<sup>a</sup>* = 1.75 m,

for fusiform spudcan footing is *H<sup>a</sup>* = 7.55 m, for skirted footing is *H<sup>a</sup>* = 5.5 m. To simplify the problem, the leg and footing are constrained as rigid. *J. Mar. Sci. Eng.* **2019**, *7*, 175 4 of 19

**Figure 3.** Sign convention and definition of terminology.

**Figure 4.** The dimensions of footings: flat base footing, fusiform spudcan footing and skirted **Figure 4.** The dimensions of footings: flat base footing, fusiform spudcan footing and skirted footing.

footing.
