The behavior of precast concrete beam-column connection with congested and non-congested stirrup under cyclic loading

The behavior of a suggested concrete precast beam-column connection with two different plain and high performance fiber HPFRCC concretes under increasing cyclic loading and constant axial loading are analyzed and investigated in this paper. The internal precast concrete beam-column connection was initially designed based on ACI 318 design code and modeled with finite element method and the analytical results was verified with experimental results and then there was appropriate collaboration between both results.  The numerical models with congested and non-congested stirrups in the critical zone were created and the behavior of connection under cyclic reversal loading were compared with considering two different concrete as regular and HPFRCC.  The results from non-linear finite element analysis indicated that with increasing concrete strength, the stiffness and ultimate strength of connections increased up to 10% and the ductility of connection cast with HPFRCC concrete was significantly increased up to 35%  with congested stirrups.