Experimental Study on the Sliding of WJ-8 Small Resistance Fastener Composite Pad

Table 2

Relationship between longitudinal resistance (r) and displacement of fasteners (x) under different reciprocating loading times.

Loading cycle (cycle)	Sliding resistance (kN)	Relational expression r (kN/m/rail), x (mm)	Correlation coefficient	Displacement of pad (cm)
Primary	4.90	r = 4.780 × (1.062 − e^−3.751x)	0.935	0.00
15	6.54	r = 7.474 × (0.898 − e^−1.667x)	0.931	0.04
30	7.75	r = 8.980 × (0.895 − e^−1.152x)	0.972	0.08
50	8.62	r = 9.238 × (0.950 − e^−0.822x)	0.988	0.30
75	9.06	r = 9.523 × (0.975 − e^−0.738x)	0.991	0.38
100	9.36	r = 9.709 × (0.983 − e^−0.689x)	0.993	0.45
150	9.81	r = 9.870 × (0.995 − e^−0.556x)	0.998	0.70
200	10.13	r = 9.237 × (1.054 − e^−0.496x)	0.990	1.26
225	10.33	r = 9.275 × (1.051 − e^−0.518x)	0.986	1.44
240	9.21	r = 9.455 × (1.026 − e^−0.460x)	0.992	4.65
250	9.17	r = 9.440 × (1.015 − e^−0.456x)	0.994	6.33
260	8.93	r = 9.239 × (1.013 − e^−0.493x)	0.996	7.52
275	8.90	r = 9.451 × (0.953 − e^−0.763x)	0.995	8.33
300	8.56	r = 8.852 × (1.026 − e^−0.556x)	0.993	8.58
325	8.47	r = 8.719 × (1.008 − e^−0.653x)	0.992	8.72
350	8.25	r = 8.415 × (1.046 − e^−0.709x)	0.993	8.73