Studying On Seismic Performance Of Frame Structure Of Reinforced Concrete Special-shaped Columns

The appearance of frame construction of steel reinforced concrete special-shaped columns have solved some difficult problems in practical engineering,which could make the arrangement of the structure more flexible and the actual estate of residential structure more wider,which also could avoid the appearance of the interior edges to make the structure more beautiful.In recent years,many actual residential projects have widely used it.This paper selects rational material constitutive model and restoring force models,through the ABAQUS finite element software,to simulate and analysis the frame construction of steel reinforced concrete special-shaped columns to study its carrying capacity,stiffness and ductility performance.Through analyzing l-shaped column,t-shaped column and ten-shaped column in trials and in practice,and its mechanical properties and by changing the components of axial compression ratio,concrete strength and the strength of reinforcing bar and other parameters to analyze the influence of each parameter on the special-shaped columns.Results showed that with the increasing of axial compression ratio,the capacity of special-shaped column increased,but poor ductility.with the increasing of concrete strength,carrying capacity of special-shaped columns increased,ductility will decline.with the increasing of reinforcement strength,the carrying capacity of special-shaped columns increased,ductility increased.The seismic capacity of specially-shaped column frame structures is not only reflected in its bearing capacity and ductility of the members,but also depends on the bearing capacity and ductility of the whole special-shaped column frame structure.In China,Specification requires to limit values of axial compression ratio and structural measures,such as measures,to ensure that the ductility of special-shaped column frame structures.Under the action of earthquakes,the destruction of ideal forms is that structure appears in the beam shaping hinges firstly,and then appears the plastic hinge in column ends.Many structures destroyed during the earthquake is because of lateral seismic structure and large overturning moment on the structure and columns exceeds the limit value of axial compression ratio,resulting in structural damage and collapse.This paper uses SAP2000 to build modeling of reinforced concrete special-shaped column frame structures,pushover analysis,through the range of plastic hinges and push-over curve and structure of drift,gibing its evaluation on structural seismic performance.