International Journal of Concrete Structures and Materials

Table 11 Strength degradation coefficient of specimens in control group III.

From: Experimental Evaluation of Effect Factors on Seismic Performance of Concrete Columns Reinforced with HTRB630 High-Strength Steel Bars

Specimen	Δ/Δ_y	λ			Specimen	Δ/Δ_y	λ
Specimen	Δ/Δ_y	Cycle 1	Cycle 2	Cycle 3	Specimen	Δ/Δ_y	Cycle1	Cycle 2	Cycle 3
H45-2 (HRB400)	2.06	1.000	0.970	0.957	T45-2 (HTRB630)	2.59	1.000	0.984	0.968
	2.75	1.000	0.984	0.969		3.46	1.000	0.987	0.973
	3.44	1.000	0.989	–		4.32	1.000	0.979	–
H60-1 (HRB400)	2.52	1.000	0.973	0.949	T60-1 (HTRB630)	2.74	1.000	0.983	0.977
	3.36	1.000	0.985	0.981		3.65	1.000	0.980	0.972
	4.20	1.000	1.001	–		4.57	1.000	0.989	–

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