Hysteretic Behavior of Eccentrically Loaded Reinforced Air-Entrained Concrete Columns under Combined Effects of Freeze-Thaw Cycles and Seawater Corrosion

Table 2

Results of low cyclic load tests on reinforced concrete columns.

Loading direction	Response	Col-1	Col-2	Col-3	Col-4
Forward loading	Yield load (kN)	13.66	13.67	12.23	11.18
	δy (mm)	3.37	3.80	5.56	4.31
	Ultimate load (kN)	17.74	17.29	16.16	14.14
	δp (mm)	12.57	9.07	11.99	10.62
	δu (mm)	15.36	12.53	14.62	10.59
Reverse loading	Yield load (kN)	−17.12	−15.30	−9.73	−17.27
	δy (mm)	−8.50	−8.86	−17.31	−8.32
	Ultimate load (kN)	−19.69	−17.14	−17.81	−20.13
	δp (mm)	−14.89	−12.68	−17.31	−12.92
	δu (mm)	−19.42	−17.42	—	−18.08

Note. δ_y = the yield displacement; δ_p = the displacement corresponding to the ultimate load; δ_u = the displacement at 85% of the ultimate load on the descending portion of the load-displacement skeleton curve.