Analysis of the whole process of gangue concrete filled steel tubular beam under loading

6 gangue concrete filled steel tubular beams (GCFT) that had different steel ratio were tested. The analysis of the whole process of beams under loading with constitutive relation of composite material and structural steel was done and the numerical method was used. The comparison between the conclusion of theoretical analysis and experiment was carried out. All these lay favorable groundwork for researching the mechanical properties of GCFT members under eccentric compression. It was important to use gangue for saving general sand and stone and protecting environment.