Developing of reinforced grouting mortar tenon and pseudo-static experimental test for seismic performance of precast shear wall

Abstract

A high-performance grouting mortar is applied to the wall joint to improve the seismic performance of the precast shear wall. This study proposes a configuration and synchronous grouting construction method for preparing reinforced high grouting mortar tenons. Three precast shear wall specimens with the prepared tenon and one common precast comparison specimen were tested with pseudo-static experiments, and the experimental results, i.e., failure process and mode, hysteretic and skeleton curves, capacities, stiffness and ductility, were analyzed. The results showed that the failure mode of precast shear wall specimens with reinforced tenon belonged to bending-shear failure. The reinforced tenon increased the strength capacity, stiffness, and energy dissipation ability and the reinforced tenon joints achieved strength capacity equivalent to a common precast shear wall. The tenon height and axial ratio significantly influenced the mechanical properties of stiffness, ductility, and energy dissipation. Which is, the tenon height should be reasonably controlled for shear transfer considerations, and the specimens with higher axial ratio showed better performance.