Theoretical Framework for Creep Effect Analysis of Axially Loaded Short CFST Columns under High Stress Levels

Table 1

Parameters of the CFST specimens.

	Specimen number	Specimen details (mm)	NL (kN)	nc
Fu [6]	0.46-I	138 × 2.57 × 380	420	0.46
Fu [6]	0.46-II	138 × 2.49 × 380	420	0.46
Fu [6]	0.72-I	138 × 2.57 × 380	679	0.72
Fu [6]	0.72-II	138 × 2.53 × 380	679	0.72
Lin [24]	0.38-I	108 × 4 × 330	377	0.38
Lin [24]	0.8-I	108 × 4 × 330	793	0.8

Note. N_L is the long-term loading load and n_c is the load ratio, which is the ratio of the initial stress of concrete core (σ₀) to the average cylinder compressive strength (f_c(t₀)), σ₀ = .