Experimental behaviour of self-consolidating concrete (SCC) filled hollow structural steel (HSS) columns subjected to cyclic loadings

The present paper is an attempt to study the cyclic behaviours of self-consolidating concrete (SCC) filled hollow structural steel (HSS) columns. The test parameters include the sectional types, the strength of concrete and steel and the axial load level (it). Eighteen self-consolidating concrete filled hollow structural steel (SCCHSS) column specimens, including 10 specimens with circular sections and 8 specimens with square sections were tested under constant axial load and cyclically increasing flexural loading. It was found that, in general, SCCHSS columns exhibit very high levels of energy dissipation and ductility, particularly when subjected to high axial loads. The features of SCCHSS columns under constant axial load and cyclically increasing flexural loading are similar to those of normal concrete-filled HSS columns. Comparisons are made with predicted column strengths and flexural stiffness using the existing codes such as AIJ-1997, AISC-LRFD-1994, BS5400-1979 and EC4-1994.