Effect of Fiber Angles on Hybrid Double-Tube Concrete Columns under Monotonic Axial Compression

Figure 13

Typical DSTCs after test. (a)  = ±80°;  = 4 mm; Type A steel tube. (b)  = ±80°;  = 4 mm; Type B steel tube. (c)  = ±60°;  = 4 mm; Type A steel tube. (d)  = ±60°;  = 4 mm; Type B steel tube. (e)  = ±60°;  = 8 mm; Type A steel tube. (f)  = ±45°;  = 4 mm; Type A steel tube. (g)  = ±45°;  = 4 mm; Type B steel tube. (h)  = ±45°;  = 8 mm; Type A steel tube.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)