Finite element analysis of joints seismic performance of frame structure under strong earthquake

Using an airport expansion project with frame structure as an example, this paper studied the seismic performance of reinforced concrete frame structure's beam-column joints under the action of earthquake. With Abaqus software, the response of structure in different seismic magnitude and peak acceleration under EL-Centro wave, Accel artificial wave and Taft wave were calculated, and the seismic performance of local frame node is also analyzed. The analysis results indicate that considering floor, the effect on stiffness of the structure is significantly improved and structural lateral stiffness is increased, but the strong weak destroy appears easily. If reinforcement ratio and stirrup ratio are improved, it will enhance the strength of column and restrict the concrete at the end of the play, which also contributes to achieve strong column weak beam type.