Research on the Seismic Performance of the Prefabricated Reinforced Concrete Column with Steel Mortise and Tenon Connections

Table 4

Secant stiffness K (kN/mm) and secant stiffness degradation coefficient γ (%) of specimens.

Specimen no.	1/1000	1/500		1/200		1/150		1/100		1/50		1/30
	K	K	γ	K	γ	K	γ	K	γ	K	γ	K	γ
RC	13.30	11.46	86.2	7.53	56.6	6.61	49.7	5.65	42.5	3.82	28.7	2.04	15.3
PRC1-1	12.26	10.20	83.2	6.61	53.9	5.90	48.1	5.19	42.3	3.45	28.1	2.13	17.4
PRC1-2	12.17	11.34	93.2	7.99	65.7	6.76	55.5	5.62	46.2	3.39	27.9	1.89	15.5
PRC2-1	12.77	11.92	93.3	7.88	61.7	6.86	53.7	5.73	44.9	3.47	27.1	1.83	14.3
PRC2-2	13.15	11.43	86.9	7.56	57.5	6.23	47.4	5.59	42.5	3.36	25.6	1.82	13.8
PRC3-1	13.81	10.40	75.3	6.80	49.2	5.86	42.4	4.89	35.4	3.13	22.7	1.63	11.8
PRC3-2	14.19	11.38	80.2	7.62	53.7	6.43	45.3	5.45	38.4	3.48	24.5	1.83	12.9