Abstract
Concrete filled steel tube (CFST) column is an important type of structural member and its protective design is essential to enhance its structural performance under various dynamic loads. Previously carried out studies on CFST columns tried to determine how to improve their structural response under various loadings, such as axial compression, lateral impact, blast, seismic, etc. Apart from investigations on transverse impact loading, the majority of the other studies on CFST under various loads established solutions and protective measures. Therefore, this study aim is to improve the performance of CFST under transverse impact loads. The geometrical and mechanical properties, boundary conditions, impact loading and dynamic explicit analysis employed in that study. This paper proposes a novel design in terms of cross-sectional configuration and smart materials to be applied on the CFST in order to improve its performance under lateral impact loading. The proposed investigation is exclusively numerical and its results were verified with the experimental results from literature. The considered three main variables were including (1) concrete-filled double skin steel tubular – CFDST with both first sandwich layer and internal carbon steel tube filled with normal strength concrete – NSC, (2) CFDST with first sandwich layer filled with Ultra High-Performance Fiber-Reinforced Concrete – UHPFRC. a. The parameters including failure modes, maximum mid-span deflection, and residual displacements were presented.
Highlights
Concrete filled steel tube (CFST) column is an important type of structural member and its protective design is essential to enhance its structural performance under various dynamic loads
Several numerical models were For example, a significant achievement in the field was identified by proposed to improve the impact resistivity of the study carried out by Wang et al [2] and Mi et al [3] by testing steel tubes filled with Ultra-High Performance Fiber Reinforced Concrete (UHPFRC)
Wang et al [30] implemented an experimental study on FRP-Concrete-Steel double skin tube members subjected to lateral impact loading
Summary
Load, geometrical properties, dimeter of circular CFST, dimensions of CFST, impact mass weight, drop height etc. Different parametric studies and various variables section states the concrete filled double skin steel tubular (CFDST) were analysed by researches to determine the response of CFST’s structural elements subjected to lateral/transverse impact load. Hollowness the concrete Filled Stainless Steel Tubular (CFSST) ratios, steel tube thickness, different types of concrete fillings, structural elements subjected to lateral/transverse impact load is boundary conditions, location/point of impact load, magnitude of axial discussed. This is including testing High Strength Concrete-Filled Steel. Concrete Filled Double Skin Steel Tubular (CFDST) structural impact load
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