Abstract
Steel tube concrete refers to a composite structure formed by filling concrete in a steel tube, and the steel tube and its core concrete can jointly bear external loads. The seismic performance of composite structures largely depends on the strength and ductility of the columns. In the structure, columns are the main vertical load-bearing components due to their high strength and good ductility. However, under seismic action, steel tube concrete columns may experience end steel tube wall buckling, and the concrete inside the pipes may be crushed and lose its load-bearing capacity, causing the overall structure to collapse. In order to better utilize the performance of steel tube concrete, this study analyzes the research of scholars and explores the axial compression performance, failure modes, and local buckling effects of different types of concrete filled in steel tubes on the structural performance of steel tube concrete. Therefore, it is particularly important to study the axial compression performance of steel-concrete columns and explore reasonable design methods to delay the local buckling of steel pipes, and accurately evaluate the seismic performance of steel-concrete columns under large earthquake responses.
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