Seismic Performance Tests of Prefabricated Shear Walls Connected with Cone-Sleeve Locking of Vertical Steel Bars

At present, prefabricated concrete shear walls are mostly connected by grouting sleeves, which can lead to defects such as loose grouting during construction. To avoid potential grouting defects, a prefabricated shear wall with vertical steel bars connected by prestressed cone-sleeve in reserved post cast area is proposed, and seismic performance research was carried out. Quasi-static tests were conducted on two concrete shear walls with an axial compression ratio of 0.1. One shear wall was cast-in-place, and the other was a prefabricated shear wall with prestressed cone-sleeve connections. The experiment found that when the drift ratio of the cast-in-place shear wall and the prefabricated shear wall were 1/40 and 1/50, respectively, the load of the specimens decreased to less than 85% of the peak load. The concrete on the lower corner wall of the cast-in-place shear wall was crushed, and the vertical steel bars in the left post-cast area of the prefabricated shear wall were pulled off. The ductility of the former was 22% higher than that of the latter, and the initial stiffness of the latter was 20% higher than that of the former. In addition, the failure modes of the two shear walls were basically the same, both of which underwent bending and shear failure, and the hysteresis performance and energy dissipation capacity were basically the same.