Behaviour and design of high strength CFST columns with slender sections

The behaviour of high strength concrete-filled steel tube (CFST) columns with slender sections under concentric loading is experimentally explored in this study. The test program includes a series of six CFST columns made of welded built-up square tube with very high strength materials and different width-to-thickness ratios. The performance of these specimens is evaluated under compression based on their failure mode, ultimate strength, strain...