Seismic Performance of a New Slurry-Anchored Connected Precast Concrete Shear Walls with Vertical Reinforcement

Abstract

The effectiveness of joint connection mode of PC shear wall structure directly determines the integrity and seismic performance of the structure. In this paper, a new type of grout-anchor connection of PC shear wall with closed stirrup constraint is proposed. For the investigation of the seismic performance of these shear walls, one cast-in-place shear wall specimen and two new slurry-anchored lap PC shear wall specimens were subjected to quasistatic test. The experimental results were verified and parametrically analyzed using the ABAQUS software. The test results showed that the slurry-anchored connection with buckled closed stirrups restraint could effectively transfer the stress. The PC shear walls and cast-in-place shear walls exhibited similar seismic performance and both exhibited bending shear damage when damaged. In general, the PC shear walls had a stronger bearing capacity and better displacement ductility performance than cast-in-place shear walls. Their energy dissipation capacity was similar to that of cast-in-place shear walls, but their initial stiffness was lower than that of cast-in-place shear walls. The numerical simulation results showed that, by increasing the axial compression ratio, the vertical connection reinforcement diameter, and the concrete strength, the stiffness and the load-carrying capacity of the horizontally jointed assembled shear wall structure could be improved within a certain range. With an increase in the height-to-width ratio, the peak load of the PC shear wall model decreased, while the ductility and the energy dissipation capacity were enhanced.