Axial Compressive Performance of Steel-Reinforced UHPC-Filled Square Stainless-Steel Tube

To study the axial compression performance of a steel-reinforced ultra-high-performance concrete-filled square stainless-steel tube (SR-UHPCFSSST), eight specimens were designed with different length-to-diameter ratios and skeleton contents, tests numerical simulations performed. Damage pattern, ultimate load capacity, load–displacement curve data obtained. Finite element analysis was performed using ABAQUS software for parameter expansion. The damage mechanisms influences various parameters, such as ratio, content, diameter-to-thickness concrete strength, on processes bearing capacities studied. results showed that among components test piece under same load, stress built-in steel first to approach its yield stress, pipe produce bulging deformation. increased increase in content strength decreased ratios. Based simulation results, this paper puts forward calculation formula capacity square-stainless-steel-tube ultra-high-performance-concrete middle-length column skeleton, which provides reference engineering design compiling relevant codes.