Research On Seismic Performance Of Prefabricated Concrete Frame Structure With Section Steel Connection

Because of the characteristics of industrial production,short construction period,energy conservation and environment protection,prefabricated construction have been widely promoted and applied in recent years.Aiming at the shortcomings of sleeve grouting technology,section steel connection between precast concrete members has been widely studied and applied.In this thesis,numerical simulation analysis and theoretical research are combined to conduct in-depth research on the seismic performance of section steel connected prefabricated concrete frame structure.The main research contents of this thesis are as follows:(1)The finite element analysis software ABAQUS was exploited to analyze the seismic performance of the PC beam-column joints of the section steel connection,and compared with the traditional cast-in-place beam-column joints of the same size.At the same time,the effects of axial compression ratio,steel strength,concrete strength and other parameters on the seismic performance of the joint were researched employing the same modeling method.(2)Based on the finite element analysis results,the influence law of each parameter on the total energy dissipation of the joint was summarized,and a simplified calculation formula for the total energy dissipation of the PC beam-column joint with the section steel connection was proposed,which was compared with that of the traditional cast-in-place beam-column joint.(3)The finite element model of a single piece of three-span six-layer steel connected PC frame structure was established.Through the dynamic elastic-plastic time-history analysis of the frame,the cumulative hysteretic energy dissipation of nodes and side nodes in the frame structure,the distribution of hysteretic energy dissipation between layers,and the distribution of hysteretic energy dissipation of various types of nodes between layers were obtained.(4)According to the calculation formula of total energy dissipation of joints and the distribution law of joint energy dissipation,the simplified calculation method of hysteretic energy dissipation and the seismic performance evaluation method of PC frame structure with section steel connection were proposed,and compared with the finite element structure,and the effectiveness of the method was verified.