324
10 Residual Axial Capacity of UHPCC-FST Column Under …
Fig. 10.1 UHPCC-FST
column a geometric
configuration b cross-section
(units mm), reprinted from
Wang et al. (2020a, b),
copyright 2020, with
permission from Elsevier
10.3.2 Steel Tube
As shown in Fig. 10.2a, five standard steel coupons of the steel tube were fabricated
according to National Standard of China (GB/T228.1-2010 2010). By conducting the
direct tension test with the MTS 810 material testing machine at the loading rate of
2 mm/min (Fig. 10.2b), the engineering tensile stress–strain curves of three specimens
are obtained as shown in Fig. 10.2c. The yield strength f y , ultimate tensile strength
f u and the elongation at the rupture of steel tube were determined as 318.5 MPa,
497 MPa and 26%, respectively.
Specimen
0
1 0
2 0
3 0
4 0
0
100
200
300
400
500
Specimen 1
Specimen 2
Specimen 3
Specimen 4
Specimen 5
Stress (MPa)
Strain (%)
(a)
(b)
(c)
Fig. 10.2 Steel tube a specimens b direct tension test c tensile stress–strain curve, reprinted from
Wang et al. (2020a, b), copyright 2020, with permission from Elsevier