Transverse impact behavior of high-strength concrete filled normal-/high-strength square steel tube columns

Energy Absorption Mechanism and Its Influencing Factors for Circular Concrete-Filled Steel Tubular Members Subjected to Lateral Impact

“…In addition, it was observed from this numerical investigation that the core concrete at the impact location exhibited obvious plastic deformation under the action of extrusion caused by local buckling of the steel tube, and it was the same as the experimental phenomenon in [ 14 , 22 ] where the core concrete was crushed at the impact location, which indicates that the energy absorption of the concrete material is significant in the impact location. For the circular CFST member simulated in this investigation, the energy absorption of concrete in the phase of local energy absorption was calculated, which accounted for 72.8% of the total energy absorption in this phase.…”

“…Therefore, the energy absorption of CFST members in the whole impact process includes the energy absorption of global deformation and local damage. In [ 21 , 22 , 23 ], the energy absorption caused by global deformation of CFST members was calculated by integrating the impact force–displacement curves measured by impact tests, and in [ 24 , 25 ], the energy absorption caused by local damage of CFST members was calculated based on contact mechanics theory. These investigations provide a method for the calculation of global and local energy absorption, but the mechanism of global and local energy absorption across the whole impact process for circular CFST members has not been identified, and in particular, the research on the process of energy absorption from the local deformation to the global response is not clear enough.…”

Circular Double Skin Stainless Steel Tubular Column Filled With Uhpfrc Subjected to Impact Load

“…Also, Wu et al [34] has determined that the residual deflections and maximum impact force increases as the drop-hammer release height increases. Yang et al [35] has experimentally tested eighteen square specimens using normal-/high-strength steel tube columns infilled with highstrength concrete. Moreover, the samples were subjected to transverse impact load.…”

“…Furthermore, the transverse impact load was generated HSCFST by a drop hammer with indenter to obtain the deformation, impact force and energy absorption of the tested specimens. Yang et al [35] has observed that the impact resistance has been greatly improved when using high strength grade S690 steel. However, due to the yield stress increment filling the CFST columns with high strength concrete did not have any major contribution in improving the impact resistance.…”

Literature Review: Concrete Filled Steel Tubes Under Transverse Impact Loading

“…Concrete Filled Steel Tubular (CFST) structural elements strengthened with Fiber Reinforced Polymer (FRP) subjected to lateral/transverse impact load Alam et al [169] did a numerical analysis to investigate the vehicle impact behavior improvement on CFST columns strengthened with CFRP. To achieve this, Alam et al [169] carried out the numerical investigation on full scale bare CFST columns and CFST columns strengthened with CFRP. Moreover, Figure 33 shows the deformed Numerical models of bare/unstrengthen CFST columns and CFRP strengthened CFST columns after being subjected to vehicular impact load.…”