Analysis on lateral impact responses of concrete-filled steel tubular composite columns with different cross-sections
With the development of steel-concrete composite structures,concrete-filled steel tubular(CFST)members have been applied in debris flow protection engineering in recent years.To study the lateral impact performance of CFST composite columns in protective structures,three different cross-sectional types of CFST composite columns were designed.A lateral impact finite element model of CFST columns was developed using ABAQUS finite element software.The lateral impact response of three composite columns was compared,including the lateral deformation,impact force,plastic deformation energy,and failure modes.The results indicated that among the three types of columns,the column with the composite section had the best lateral impact resistance,with the smallest global deformation and local plastic damage under lateral impact.Compared with the circular CFST column,the maximum lateral displacement of round-ended and composite section columns was reduced by 28.9%and 43.4%,respectively,and the plateau impact force was increased by 31.3%and 80.9%,respectively.
concrete-filled steel tubular columnsimpactfinite element analysisdynamic responses
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