Seismic behavior of a precast RC frame-shear wall structure using full/half grout sleeve connections

To investigate the seismic behavior of precast RC frame-shear wall structures using full/half grout sleeve con-nections, two RC frame-shear wall structure specimens were constructed and tested under cyclic loadings: the first specimen was a precast RC frame-shear wall structure (Specimen PCFW), and the second specimen was a conventional RC frame-shear wall structure (Specimen RCFW) cast in situ. The seismic performance of Speci-mens PCFW and RCFW including the failure modes, hysteretic responses, and energy dissipation capacities was investigated. Furthermore, the mechanical behavior of Specimen PCFW was numerically simulated using the OpenSees software. The test results show that the crack distribution of Specimen PCFW is more dispersed than that of Specimen RCFW. In particular, few cracks appear in the area of full/half grout sleeves in Specimen PCFW. However, the damage to the concrete around the half grout sleeves of the side columns in the shear wall of Specimen PCFW in the 1st story was more severe than that in the corresponding region of Specimen RCFW for a less thick concrete cover. Compared to Specimen RCFW, Specimen PCFW exhibits higher lateral bearing ca-pacity, better energy dissipation ability, and slightly lower ductility. In addition, assuming the equivalent principle of rebar area, the mechanical behavior of Specimen PCFW can be effectively simulated using the nonlinear multilayer shell element in the OpenSees software.

Automated summary

Two precast and cast-in-situ RC frame-shear wall structure specimens were tested to investigate their seismic performance. It was found that the crack distribution in the precast specimen was more dispersed, with fewer cracks in the area of grout sleeves. However, the damage to the half grout sleeve region of the shear wall in the precast specimen was more severe than the cast-in-situ specimen. The precast specimen exhibited higher lateral bearing capacity, better energy dissipation ability, and slightly lower ductility compared to the cast-in-situ specimen.