Seismic behavior of reactive powder concrete (RPC) interior beam–to-column joints under reversed cyclic loading

Abstract

Not all precast concrete structures show performance that can be obtained by experiment. Finite element analysis also plays a vital role in the study of structural performance. In this paper, a steel hysteretic is employed to reproduce the experimental response of a steel strand anchored precast concrete frame joints exposed to reversed cyclic load tests. The ultimate load and ultimate displacement obtained by finite element calculation are not more than 1% different from the experimental values. By employing the proposed model, the hysteretic curve, energy dissipation capacity, stiffness degradation, and displacement ductility of the reactive powder concrete (RPC) interior beam–column joints were analyzed. According to the analysis, in the case of the failure morphology of RPC beam-to-column joints with friction dampers, it is evident that the plastic hinge at the end of beam had shifted outward. In addition, both the energy dissipation capacity and the ultimate bearing capacity of the RPC interior beam–column joints have been improved, the ultimate load of PC2 is 28.8% higher than that of PC1. According to the aforementioned results, the parametric analysis of the RPC interior beam–column joint was performed. Subsequently, by varying the friction coefficient of the friction damper, the stirrup spacing in the panel zone and the different axial compression ratios, the influence of a number of different parameters on the mechanical properties of the joint was obtained.