ABSTRACT
Three Rectangular Hollow Steel Tubular (RHST) and nine Partially Concrete-Filled Steel Tubular (PCFST) column specimens were tested under lateral impact. Length of the column is 1500 mm. Steel with a nominal yield strength of 345 MPa was applied to fabricate the cold-formed steel tubes. Self-consolidating concrete with nominal cubic compressive strength of 30 MPa was applied to fill the tubes partially. The concrete filling height, the impact direction and the impact energy are the main factors considered in this study. The typical displacement and strain responses, as well as the failure modes of the specimens were all analysed. The result showed that the PCFST specimens had much better anti-impact performance than the RHST specimens. The concrete filling height affected the failure mode significantly especially when the specimen was tested under a larger impact energy. The impact direction and energy also affected the anti-impact performance of the specimen significantly.
