Axial Performance of Steel Fiber-Reinforced Rubberized Concrete-Filled Circular Tubular Columns

Table 5

Stiffness calculation.

Specimen number	(KN)		(KN)
SFRP-1	457.0	0.0230	19846.86	0.93
SFRP-2	434.0	0.0252	17209.04	0.81
SFRP-3	432.0	0.0241	17908.36	0.84
SFRP-4	408.4	0.0482	8465.018	0.40
SFRP-5	269.1	0.0241	11155.42	0.52
SFRP-6	326.0	0.0208	15648.00	0.73
SFRP-7	318.0	0.0154	20715.43	0.97
SFRP-8	467.1	0.0219	21299.31	1.00
SFRP-9	341.0	0.0132	25916.00	1.22
SFRP-10	384.7	0.0274	14033.86	0.66
SFRP-11	392.2	0.0395	9935.73	0.47