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Performance of square concrete-filled steel tubular columns under repeated lateral impact
Highlights The dynamic performances of square CFST under repeated lateral impact are investigated. Modelling techniques for the development of the model under repeated impacts are presented in detail. A wide range of low- and high-sensitivity parameters affecting the impact resistance of the models is investigated. A simplified formula for calculating the dynamic flexural capacity of CFST under repeated lateral loads is proposed. A simplified formula for calculating the residual axial-compression resistance of CFST under repeated lateral loads is proposed.
Abstract In this paper, a series of simulations are conducted to study the dynamic performances of square concrete-filled steel tubular (CFST) columns under repeated lateral impact by considering the effects of common design parameters. The results show that the impact force response of square CFST columns with proper design under five lateral impacts is similar to that under single lateral impact. The failure mode of the specimen mainly presents the overall bending failure. The energy absorption ratio decreases gradually with the increase of impact times. The plastic deformation of the tube works as the main energy dissipation mechanism of CFST, therefore the impact resistance of square CFST columns can be effectively increased with the increase in steel yield strength, sectional steel ratio and dimension. The axial compression ratio less than 0.6 is beneficial for the impact resistance of the model. The prediction formulas of the dynamic flexural capacity and the residual axial-compression resistance of square CFST columns under repeated lateral loads considering the influence of impact times and various parameters are proposed and in good agreement with the numerical results.
Performance of square concrete-filled steel tubular columns under repeated lateral impact
Highlights The dynamic performances of square CFST under repeated lateral impact are investigated. Modelling techniques for the development of the model under repeated impacts are presented in detail. A wide range of low- and high-sensitivity parameters affecting the impact resistance of the models is investigated. A simplified formula for calculating the dynamic flexural capacity of CFST under repeated lateral loads is proposed. A simplified formula for calculating the residual axial-compression resistance of CFST under repeated lateral loads is proposed.
Abstract In this paper, a series of simulations are conducted to study the dynamic performances of square concrete-filled steel tubular (CFST) columns under repeated lateral impact by considering the effects of common design parameters. The results show that the impact force response of square CFST columns with proper design under five lateral impacts is similar to that under single lateral impact. The failure mode of the specimen mainly presents the overall bending failure. The energy absorption ratio decreases gradually with the increase of impact times. The plastic deformation of the tube works as the main energy dissipation mechanism of CFST, therefore the impact resistance of square CFST columns can be effectively increased with the increase in steel yield strength, sectional steel ratio and dimension. The axial compression ratio less than 0.6 is beneficial for the impact resistance of the model. The prediction formulas of the dynamic flexural capacity and the residual axial-compression resistance of square CFST columns under repeated lateral loads considering the influence of impact times and various parameters are proposed and in good agreement with the numerical results.
Performance of square concrete-filled steel tubular columns under repeated lateral impact
Gao, Shan (author) / Xu, Youchun (author) / Zhang, Sumei (author) / Derlatka, Anna (author)
Engineering Structures ; 280
2023-01-26
Article (Journal)
Electronic Resource
English
| DOAJ | 2023
Research on concrete-filled square steel tubular columns
| British Library Conference Proceedings | 1997