Abstract
Steel-concrete composite (SCC) columns have widely been applied in modern construction industry owing to the composite action between the concrete and the steel. The benefits of SCC columns can be further achieved if the confinement effect of concrete is applied. Therefore, this paper presents an innovative square steel-concrete composite (ISSCC) column made of four steel tubes at the corners and corrugated steel batten plates on all sides. Through the experimental and finite element (FE) numerical simulation calculations, the axial compression performance and seismic performance of the ISSCC column were discussed, and the FE model was verified through experimental results. The seismic performance of the ISSCC column was compared and analyzed with reinforced concrete column under different axial compression ratios. The research showed that FE models can accurately simulate the deformation, stress, and failure states of the ISSCC column under axial pressure and horizontal low cyclic load. Furthermore, the ISSCC column performed good ductility and energy dissipation capacity, and the seismic performance index was better than the reinforced concrete column and had better seismic performance. The results of this study can provide reference for the design and development of the new composite column.
Highlights
With the development of urban construction, the height and span of buildings are increasing, and the loads on beams and columns are increasing. e structure and components need to have higher bearing capacity, smaller cross section size, better ductility, stronger fire resistance, and good construction convenience to meet the requirements. e steelconcrete composite (SCC) column with high bearing capacity and good ductility has widely been used in the construction of industrial buildings, high-rise buildings, long-span bridges, and transmission towers
Cai et al [11,12,13,14,15,16,17,18,19,20] investigated the steel tube with binding bars, and horizontal restraint rods were installed along the steel tube wall. e research showed that the restraint effect of the steel pipe on the core concrete and the bearing capacity and ductility of the concrete-filled steel tube (CFST) columns have been
A new type of the steel-concrete composite column was presented and tested under the axial load. e schematic diagram of the innovative square steel-concrete composite (ISSCC) column is shown in Figure 1, in which the square steel tube is arranged at the four corners of the new composite column and corrugated steel batten plates on all sides, the concrete is poured in
Summary
With the development of urban construction, the height and span of buildings are increasing, and the loads on beams and columns are increasing. e structure and components need to have higher bearing capacity, smaller cross section size, better ductility, stronger fire resistance, and good construction convenience to meet the requirements. e steelconcrete composite (SCC) column with high bearing capacity and good ductility has widely been used in the construction of industrial buildings, high-rise buildings, long-span bridges, and transmission towers. E eight-node reduced integration linear solid elements with three translation degrees of freedom (C3D8R) were utilised for modelling the steel tube, corrugated steel plate, concrete and loading plates [1,2,3,4]. E translational degrees of freedom of all nodes in the loaded steel plate are coupled in the vertical loading direction, and load was applied by means of displacement Both material and structural nonlinearities were considered, and the static general method was used in the solution process. In order to obtain a deeper understanding on the mechanical performance of ISSCC columns under axial loading, the composite action between concrete-filled steel tube, steel tube-panelled space frame, and core concrete is conducted . The confinement effect was significant in ISSCC columns, and the axial bearing capacity of the column was improved
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