Behavior and Splice Length of Deformed Bars Lapping in Spirally Confined Grout-Filled Corrugated Duct

Table 2

Summary of test results.

Specimens	fu(MPa)	Average (MPa)	fu/fbyk	Failure mode
C40-16-0.8-6-100	543.1	548.1	1.36	BP
	543.5		1.36	BP
	557.8		1.39	BP
C40-16-0.8-6-75	600.1	598.1	1.50	BF
	598.5		1.50	BP
	595.8		1.49	BP
C40-16-0.8-6-50	604.3	604.3	1.51	BF
	610.6		1.53	BF
	598.0		1.50	BF
C40-16-0.8-4-75	579.3	579.3	1.45	BF
	582.5		1.46	BP
	576.1		1.44	BP
C40-16-0.8-4-50	602.3	598.0	1.51	BF
	593.6		1.48	BP
	598.1		1.50	BF
C40-16-1.0-6-100	576.3	572.5	1.44	BP
	560.4		1.40	BP
	580.7		1.45	BP
C40-16-1.0-6-75	599.1	601.5	1.50	BF
	600.6		1.50	BP
	604.7		1.51	BF
C40-16-1.0-6-50	613.0	606.7	1.53	BF
	608.9		1.52	BF
	598.1		1.50	BF
C40-16-1.0-4-75	599.6	590.7	1.50	BF
	591.2		1.48	BP
	581.3		1.45	BP
C40-16-1.0-4-50	603.3	603.4	1.51	BF
	598.1		1.50	BP
	608.7		1.52	BF
C40-16-1.2-6-100	604.8	606.0	1.51	BF
	609.1		1.52	BF
	604.1		1.51	BF
C40-16-1.2-6-75	611.8	607.7	1.53	BF
	603.6		1.51	BF
	607.7		1.52	BF
C40-16-1.2-6-50	598.0	601.2	1.50	BF
	605.0		1.51	BF
	600.5		1.50	BF
C40-16-1.2-4-75	598.3	602.2	1.50	BF
	607.1		1.52	BF
	601.1		1.50	BF
C40-16-1.2-4-50	598.0	600.6	1.50	BF
	603.6		1.51	BF
	600.3		1.50	BF
C40-18-0.8-6-100	509.8	495.7	1.27	BP
	495.4		1.24	BP
	481.8		1.20	BP
C40-18-0.8-6-75	561.9	575.8	1.40	BP
	598.0		1.50	BP
	567.6		1.42	BP
C40-18-0.8-6-50	613.1	604.0	1.53	BF
	601.9		1.50	BP
	598.1		1.50	BP
C40-18-0.8-4-75	518.2	520.6	1.30	BP
	523.1		1.31	BP
	520.6		1.30	BP
C40-18-0.8-4-50	543.5	544.7	1.36	BP
	535.7		1.34	BP
	555.0		1.39	BP
C40-18-1.0-6-100	582.9	573.5	1.46	BP
	559.2		1.40	BP
	578.4		1.45	BP
C40-18-1.0-6-75	619.9	613.9	1.55	BF
	607.5		1.52	BP
	614.2		1.54	BP
C40-18-1.0-6-50	614.6	614.5	1.54	BF
	618.7		1.55	BF
	610.3		1.53	BF
C40-18-1.0-4-75	570.1	584.7	1.43	BP
	580.9		1.45	BP
	603.1		1.51	BP
C40-18-1.0-4-50	589.4	593.4	1.47	BP
	598.0		1.50	BP
	592.8		1.48	BP
C40-18-1.2-6-100	601.5	592.0	1.50	BP
	594.3		1.49	BP
	580.2		1.45	BP
C40-18-1.2-6-75	620.5	617.7	1.55	BF
	615.7		1.54	BF
	616.9		1.54	BP
C40-18-1.2-6-50	619.2	620.5	1.55	BF
	625.5		1.56	BF
	616.8		1.54	BF
C40-18-1.2-4-75	588.3	594.4	1.47	BP
	593.1		1.48	BP
	601.9		1.50	BP
C40-18-1.2-4-50	608.1	615.6	1.52	BF
	618.1		1.55	BF
	620.7		1.55	BP

BF represents bar fracture failure; BP represents bar pullout failure.