Experimental Study on Seismic Fatigue Capacity of High- and Mild-Strength Structural Steels with and without Corrosion

Table 4

Results of the S235 high cycle fatigue test for thicknesses: (a) 8 mm, (b) 12 mm, (c) 15 mm, and (d) 20 mm.

Sample number	Stress applied (MPa)	Average number of cycles	Sample status at the end of the cycle
(a) Chemical properties of tde sample made of plate witd a tdickness of 8 mm
Sample yield stress: 366 MPa		Sample ultimate stress: 510 MPa
Mechanical properties of tde sample made of plate witd a tdickness of 8 mm
1	290	19,524	Failure
2	250	198,364	Failure
3	220	325,655	Failure
4	180	725,365	Failure
5	160	1,852,745	Failure
6	155	2,251,122	Failure
7	150	12,525,951	No failure
8	148	12,875,210	No failure
(b) Chemical properties of tde sample made of plate witd a tdickness of 12 mm
Sample yield stress: 320 MPa		Sample ultimate stress: 468 MPa
Mechanical properties of tde sample made of plate witd a tdickness of 12 mm
1	260	35,852	Failure
2	250	431,251	Failure
3	230	752,328	Failure
4	170	1,335,586	Failure
5	155	2,582,457	Failure
6	150	4,745,362	Failure
7	145	11,784,965	No failure
8	143	11,994,264	No failure
(c) Chemical properties of tde sample made of plate witd a tdickness of 15 mm
Sample yield stress: 352 MPa		Sample ultimate stress: 458 MPa
Mechanical properties of tde sample made of plate witd a tdickness of 15 mm
1	250	52321	Failure
2	235	325674	Failure
3	200	825432	Failure
4	180	998365	Failure
5	150	1665258	Failure
6	140	3259745	Failure
7	135	11258456	No failure
8	133	11856789	No failure
(d) Chemical properties of tde sample made of plate witd a tdickness of 20 mm
Sample yield stress: 287 MPa		Sample ultimate stress: 467 MPa
Mechanical properties of tde sample made of plate witd a tdickness of 20 mm
1	230	86,325	Failure
2	200	165,250	Failure
3	180	428,693	Failure
4	160	825,784	Failure
5	140	1,746,325	Failure
6	120	2,325,458	Failure
7	115	12,582,865	No failure
8	113	12,985,147	No failure