*4.4. Formula Verification*

In this paper, the data from the tests and extended parameter analyses, as well as the data used for comparison with [9] and [20], were used to verify Formula (9). The verification results are shown in Table 9, whereby the symbol YZSS(YZFS) represents the specimens strengthened by the PCSAM corresponding to [9], while the symbol ZMR(ZRW) represents the specimens from Tang's test corresponding to [20]. It can be observed in the table that the difference between the bearing capacity calculated by Formula (9) and the

**Name BCT(S) \*<sup>1</sup> (kN) ACSC of Column** *f* **co (MPa) Filled Concrete Strength** *f* **sc (MPa) Concrete Strength of LCSS** *f* **gc (MPa) Self-Stress** *q* **(MPa) Confinement Coefficient** *θ* **Self-Stress Level** *η* **BCC \*<sup>2</sup> (kN) Difference** S1-A 2147 20.1 19.8 20.9 0 0.176 0 2035 −5.20% S1-S 2621 20.1 21.7 20.9 0.99 0.177 0.046 2565 −2.12% S1-SS 2153 20.1 21.7 13.4 0.83 0.147 0.038 2243 4.19% S2-S 1926 20.1 21.7 20.9 0.63 0.250 0.031 2116 9.89% M-1 2578 20.1 21.7 20.9 0.8 0.177 0.037 2507 −2.77% M-2 2695 20.1 21.7 20.9 1 0.177 0.046 2568 −4.71% M-3 2802 20.1 21.7 20.9 1 0.177 0.055 2615 −6.67% M-4 2810 20.1 21.7 23.4 1 0.182 0.046 2648 −5.78% M-5 2876 20.1 21.7 26.8 1 0.192 0.046 2769 −3.71% M-6 2992 20.1 21.7 32.4 1 0.204 0.046 2960 −1.06% M-7 2771 20.1 23.4 20.9 1 0.180 0.043 2633 −4.99% M-8 2859 20.1 26.8 20.9 1 0.187 0.037 2774 −2.96% M-9 2955 20.1 32.4 20.9 1 0.196 0.031 3004 1.66% YZSS1 \*<sup>3</sup> 3578 39.8 17.9 44.2 0 0.075 0 3470 −3.03% YZSS2 \*<sup>3</sup> 3220 39.8 17.9 44.2 0 0.075 0 3470 7.76% YZSS3 \*<sup>3</sup> 3984 39.8 17.9 44.2 0 0.075 0 3470 −12.90% YZFS1 \*3 4640 39.8 17.9 44.2 0 0.125 0 4060 −12.51% YZFS3 \*3 4524 39.8 17.9 44.2 0 0.125 0 4060 −10.26% ZMW1 \*4 1120 20.1 32.8 0 0 0.155 0 991 5.87% ZMW2 \*4 936 20.1 32.8 0 0 0.155 0 991 −11.52% ZRW1 \*4 1027 20.1 45.5 0 0 0.128 0 1153 12.25% ZRW2 \*4 1071 20.1 45.5 0 0 0.128 0 1153 7.66% ZRW3 \*4 1113 20.1 45.5 0 0 0.128 0 1153 3.59%

bearing capacity of the tested and simulated specimens is less than 13%, which shows good applicability.

**Table 9.** Verification results of the fitting formula.

\*1: BCT(S) = Bearing capacity of specimens tested (or simulated). \*2: BCC = Bearing capacity calculated by Formula (4). \*3: The symbol YZSS(YZFS) represents the data from [9]. \*4: The symbol of ZMW(ZRW) represents the data from [20].
