Performance of Special-Shaped Concrete-Filled Square Steel Tube Column under Axial Compression

Figure 1

Cross-sections of special-shaped CFST columns: (a) SS-CFST column; (b) SS-CFST column with binding bars; (c) SC-CFST column with stiffener ribs; (d) SC-CFST column connected with steel plates; (e) multicell SC-CFST column.

(a)

(b)

(c)

(d)

(e)