Axial Compression Behavior of Rubberized Concrete-Filled Square Steel Tubular Columns after Exposed to High Temperatures

Table 2

Mechanical properties of square steel tube.

T (°C)	t (min)	fy (MPa)	fu (MPa)	E (GPa)
20	—	498	609	210
200	180	401	490	207
400	180	379	463	203
600	180	278	338	199
800	180	254	311	192
600	30	452	548	205
600	90	313	381	201

Note. T. = temperature, t = time, fy = yield strength, fu = ultimate strength, and E = Young’s modulus.