Precast fiber reinforced cementitious composites for seismic retrofit of deficient rc joints – A pilot study

摘要: Abstract The objective of this study was to investigate the seismic behavior deficient reinforced concrete exterior beam–column joints constructed with low-strength and plain reinforcing bars before after retrofitting prefabricated HPFRCC (high-performance fiber-reinforced cementitious composite) panels. For purpose, four full-scale beam–column–slab–transverse beam sub-assemblies were tested under constant column axial load reversed static cyclic lateral loads. Before these tests, simple panel specimens, which built represent joint cores, also diagonal tension Both types tests showed that panels provided considerable enhancement, both in strength displacement capacity, properly anchored core slippage longitudinal prevented. In analytical part study, strengths reference retrofitted panels, tension, predicted quite accurately using non-linear finite element analysis. Furthermore, Mohr’s circle strut-and-tie modeling used obtain complete load–displacement relationships sub-assemblies.