Some of the concrete-filled elliptical tube specimens after testing under axial compression

Fig. 4. Typical failure modes of specimens: (a) CH20; (b) C10-8; (c) C15-8; (d) C20-8; (e) C25-8; (f) C20-5; and (g) C20-12.

From the same paper as the previous 2 images

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