The Prediction of Cracking Load and Peak Load of UHPC-NC Composite Structure

Table 1

The experimental data and calculated data of UHPC-NC are reported in the literature.

Ref	Specimen name	UHPC			TSSM	fc'	NR		UR		PR		RM	Cracking load			Peak load
		fuc (Mpa)	fut (Mpa)	Eu (Gpa)			Area	fsn	Area	fsu	Area	fy		EXP	OR	CAL	COV	EXP	OR	CAL	COV
[18]	R-S-1	128	15	46.0	Two	54	157	680	—		—		1	9.49	—	12.94	—	23.30	24.60	24.99	3.64
	R-S-2												3	11.79				29.30	26.50	28.62	5.19
	R-S-3												4	25.88		26.38		37.90	35.70	41.18	7.21
	R-E-1												1	13.51		12.94		21.60	24.60	24.99	7.82
	R-E-2												3	12.65				27.30	26.50	28.62	3.89
	R-E-3												4	27.31		26.38		37.10	35.70	41.18	7.50
[24]	P1	130	11.5	51.0	Multi	30	226	500	157	500	—		1	—	—	—	—	55.20	51.90	53.45	2.54
	P2												1					54.00
	U1												1					54.60	58.80	55.09	3.62
	U2												1					56.30
	UactB1												1					102.10	102.10	106.84	1.98
	UB2												1					105.40
[22]	BU-20	156	11	34.6	Multi	29.7	402	546	—		—		2	35.00	33.67	—	—	142.20	135.97	—	—
	BU-40												2	38.50	34.67	—	—	148.20	136.00
	BU-60												2	39.70	34.83	—	—	137.00	136.00
	BL-20												1	70.50	82.56	66.14	11.64	118.90	140.31	141.71	9.57
	BI-40												1	84.25	87.99	88.39	2.63	145.30	173.32	170.87	9.51
	BI -60												1	88.50	90.62	90.55	2.62	156.30	205.15	198.57	14.20
[15]	SUC	164	12	57.5	—	45.4	226	590	—		—		1	—	—	—	—	41.00	—	42.01	1.72
	SUT												2					42.00		39.11	5.04
	SU3												4					89.00		87.75	1.00
[26]	R/C 4	177	11.5	44.0	Multi	22	0	0	—		—		—	—	—	—	—	410.00	—	408.13	0.32
[25]	S50-2-290	119.12	14.70	48.53	Multi	57.94	—		1362	509	278	1353	1	168.90	174.60	178.87	2.87	845.60	751.00	873.00	7.78
	S50-2-360	121.30	14.78	46.85		54.4						1411	1	184.05	190.50	186.50	1.74	867.30	776.80	884.42	6.86
	S50-2-360	118.71	15.43	48.47		63.56						1350	1	198.98	211.80	181.51	7.70	868.80	806.50	867.60	4.20
	S50-3-290	116.97	14.13	48.91		64.09			829		417	1162	1	228.98	224.10	215.72	3.01	849.30	759.60	844.85	6.18
	S50-3-360	111.29	17.33	45.96		60.52						1136	1	232.95	231.45	233.68	0.49	873.60	815.80	887.36	4.42
	S50-3-430	108.00	16.22	44.74		51.49						1180	1	251.40	228.30	215.59	7.83	850.90	794.90	864.26	4.40
	S50-4-290	109.04	14.65	46.84		57.67			201		556	1230	1	287.93	251.63	244.30	8.94	790.00	676.90	730.24	7.73
	S50-4-360	108.53	15.84	44.22		59.16						1210	1	285.45	249.08	241.78	9.04	777.40	686.70	800.01	7.95
	S50-4-430	112.96	17.13	46.98		60.97						1230	1	287.63	265.28	271.20	4.22	787.80	738.50	833.40	6.03

Note: 1, TSSM denotes the tensile stress-strain model; NR, denotes the reinforcement in normal concrete; UR, denotes the reinforcement in UHPC; PR denotes the adding prestress tendons in UHPC; RM denotes the reinforcement mode; EXP denotes experimental result; OR denotes calculation result of original literature; CAL denotes calculation result in this paper.2. The cracking load in reference [13] is P and the unit is kN, but the peak load is M and the unit is kN·m. To avoid misunderstanding, P is converted into M according to the experimental structure, and the units are kN·m.