Study of Seismic Performance and Moment-Curvature Relationship of W-LCFST Columns
In order to study the seismic performance of the wide-leg L-shaped CFST column(W-LCFST column).ABAQUS was used to establish the finite element model considering the plastic damage of concrete and ductile metal damage,on the basis of verifying the reasonableness and accuracy of the model,comparison and analysis the effect on seismic performance of parameters such as equal limb section,unequal limb section,axial compression ratio,steel thickness.The results showed that height-width ratio of W-LCFST column with equal limb from 4.0 to 5.0,the initial stiffness and peak positive load capacity increased by 16.9％and 35.0％respectively,The height to width ratio of X-direction increasing from 4.0 to 5.0,the initial stiffness and peak positive load capacity of column has increased by 15.3％and 31.8％.When the height to width ratio of Y-direction increased from 4.0 to 5.0,the initial stiffness and positive peak load capacity increased by 9.4％and 18.0％respectively.The load carrying capacity and ductility has decreased by 13.8％and 6.8％respectively with axial compression ratio from 0.2 to 0.6.Peak carrying capacity and ductility increased by 25.7％and 4.9％respectively after steel thickness from 6mm to 10 mm.The results of finite element simulation,experiment,and theoretical calculation are in good matching degree with an error of within 10％,verified the accuracy of the bending moment curvature calculation method.Increasing the equal limb section ratio,X-direction limb length and steel thickness improve the bearing capacity,initial stiffness and ductility of column.
W-CFST columnseismic performancefinite element analysismoment-curvature relationship
万方数据
维普
