Fatigue Properties of Plain Concrete under Triaxial Tension-Compression-Compression Cyclic Loading

Table 2

Test data of fatigue for variable amplitude.

Specimen number	Fatigue life				Specimen number	Fatigue life
	25250101	52203		24		0.45	215	25250301		52203	1004	121	1.79	255
25250102	52203	308	3.48	234	25250302	52203	1004	75	1.30	248
25250103	52203	272	3.09	238	25250303	52203	1004	13	0.64	192
25250104	52203	43	0.66	247	25250304	52203	1004	360	4.33	244
25250105	52203	640	7.01	204	25250305	52203	1004	29	0.81	232
25250201	19	816980	3.33	217	25250401	19	1004	1498232	6.24	234
25250202	19	185321	0.91	213	25250402	19	1004	300168	1.65	229
25250203	19	114847	0.64	225	25250403	19	1004	70474	0.77	203
25250204	19	91356	0.55	199	25250404	19	1004	49593	0.69	237
25250205	19	1934129	7.61	243	25250405	19	1004	109627	0.92	226
25500101	304705	110	1.86	327	25500301	304705	1060	67	1.52	308
25500102	304705	17	0.45	319	25500302	304705	1060	315	5.27	314
25500103	304705	43	0.85	313	25500303	304705	1060	16	0.74	301
25500104	304705	233	3.73	306	25500304	304705	1060	32	0.99	335
25500105	304705	59	1.09	286	25500305	304705	1060	143	2.67	327
25500201	13	2559519	1.88	310	25500401	13	1060	594174	0.89	334
25500202	13	700821	0.66	302	25500402	13	1060	1218818	130	305
25500203	13	594174	0.59	275	25500403	13	1060	289469	0.69	307
25500204	13	1767287	1.36	293	25500404	13	1060	319940	0.71	320
25500205	13	>2500000	>1.88	319	25500405	13	1060	>2500000	>2.14	261
50500101	17171	1057	2.08		50500201	112		340844	4.17	400

Note. , is the ultimate strain of specimen damage. Specimen numbering methods xxyyzztt: xxyy means the two directions of lateral compressive stress ratio, where 2550 indicates that one direction of lateral compressive stress ratio is 0.25, another is 0.50; zz represents the amplitude loading condition; 01, 02, 03, and 04 are four testing loading conditions for low-high, high-low, low-medium-high, and high-medium-low, respectively; tt represents the sample number to each operating mode.