Research On Seismic Damage Model Of Reinforced Concrete Frame Columns

The earthquake is a devastating natural disaster, earthquake will bring a crushing blow to the building structures, and human life and property will also be serious influenced.Reinforced concrete structure, a structure as currently the most widely used frame around the world frame, columns as the main stress components, making more and more scholars pay close attention to the action of reinforced concrete frame columns under the seismic load. This article adopts the research methods of theoretical analysis and numerical simulation, the research on damage performance of the frame columns are analyzed, the damage evolution law of frame columns under earthquake are obtained.The paper use ANSYS to design 10 frame columns,and get the displacement and force of the columns,making the hysteretic curve and skeleton curve of columns.According to the result we can know the damage evolution law and seismic performance of frame columns by shear span ratio、axial compression ratio and concrete strength.This paper analyses existing demestic and foreign single parameter and double parameters seismic damage model, And a new double parameters seismic damage model for reinforced concrete frame columns is presented. A linear combination of the two damage of the maximum deformation of components and the cumulative hysteretic energy dissipation is used to express the damage degree of structure in this model. According to the analysis of finite element of reinforced concrete frame columns members under low reversed cyclic loads,the experimental parameters of the model are defined. The accuracy is verified by contrasting the classical model like Park- Ang model and the new model inset another known experimental data. It provides reference significance for the seismic design and calculation of the reinforced concrete frame columns.