Table 1.

The measurement of load and displacement in epoch data [15].

Epoch Data	1	2	3	4	5	6	7	8	9
Load (kN)	0	14.17	22.40	31.85	37.10	43.60	54.52	58.92	65.85
Displacement (mm)	0	2.13	4.38	6.25	7.25	9.62	19.06	32.87	46.63