summarizes the basic geometrical properties of the specimens.
The specimens consist of ten stubs with eight stiffened specimens and two non-stiffened counterparts.
The cross sections of the specimens with stiffeners are showed in Fig. 1. The longitudinal arrangement of stiffeners on steel tubes is showed in Fig. 2.
The depth b and length L of all the specimens are 200 mm and 600 mm respectively.
Two nominal steel plate thicknesses t (2.0 mm and 3.5 mm) were chosen for steel tubes and hot-rolled plate.
Reinforcements with nominal diameter d and tensile strips with cross-sectional dimensions d * t were employed as stiffeners.
Based on the nominal steel plate thickness t, the specimens are divided into two groups: group I (t=2.0 mm and corresponding