Effects of grouting defects on seismic behavior of full-scale precast reinforced concrete shear wall

Abstract

To study the effects of grouting defects on seismic behavior of precast reinforced concrete shear walls, a quasi-static test of seven precast reinforced concrete shear walls was conducted with different grout-deficient sleeves and length of grouting defects. The failure process, final failure mode and seismic performance parameters of different specimens were compared and analyzed. The test results indicate that the failure mode of precast reinforced concrete shear walls with grouting defects is similar with that of the grout-compact specimen. The ultimate failure mode of reinforced concrete shear walls connected by grouting sleeve was that the outermost longitudinal reinforcement of the edge member was subjected to tensile yielding or even fracture due to the inclination of the sleeves. The bearing capacity, peak displacement and energy dissipation of the shear wall decreased with the increase of the number of grouting defect sleeves. Furthermore, the influence of grouting defects on the initial stiffness was not obvious, but the influence on the later stiffness became greater.