Numerical Simulation of the Dynamic Responses and Impact-Bearing Capacity of CFDST Columns under Lateral Impact

The concrete-filled double steel tube (CFDST) has been more and widely used in infrastructure due to its greater moment of inertia compared the ordinary (CFST). With increase collision accidents occurring recent years, research on CFDST under impact needs attention. To study dynamic responses columns lateral impact, finite element package ABAQUS was simulate force mid-span deflection column coupling action axial based comparison experimental data literature. influence hollow ratio, compression slenderness energy, material strength are studied. results show that with ratio from 0.3 0.8, residual decreases by 77.9%. shows an increasing trend following a decreasing one increasing. 30 60, plateau 62.5%, increases 240.5%. practical formulas for impact-bearing capacity suggested high accuracy.