Experimental Study on High-Cycle Fatigue Behavior of GFRP-Steel Sleeve Composite Cross Arms

Table 1

Loading scheme.

Specimen	Loading condition	Load peak (kN)		Cycles	Comments
		Upper limit	Lower limit
GZ-1	1	97.88	43.63	500,000	Basic windy condition: 10 m/s
GZ-2	1	97.88	43.63	500,000	Basic windy condition: 10 m/s
GZ-3	2	178.98	−40.96	500,000	Ultimate windy condition: 30 m/s
GZ-4	3	178.98	−178.98	500,000	Equal amplitudes of tension-compression loading
GZ-5	4	200.00	−200.00	500,000	1.1 times of loading condition 3
GZ-6	5	230.00	−230.00	500,000	1.3 times of loading condition 3

Negative sign of the load peak indicates tension loads, while positive sign indicates compression loads.