English：

Traditional fully cast-in-place concrete infill walls have poor stiffness and ductility, are prone tocracking under external forces such as earthquakes,which affects the safety performance of buildings. Toimprove the performance of building walls, a new type of PVC jointing technologywas designed anddeveloped. The new PVC jointing features a double-layer U-shaped groove design,with the inner layerfixing the jointing plate and the outer layer having a waterproof sealing design. It also has built-in sensorsto monitor the stress changes of the wall in real time. Quasi-static tests were conducted on shear wallspecimens, new PVC jointing wall specimens, and extruded polystyrene board jointing wall specimens,and the load-displacement hysteretic curves, load-displacement skeleton curves, and stiffness degradationcurves of the walls were analyzed. The test results show that, the new PVC jointing specimens exhibitgood stiffness and ductility under both forward and reverse loading, effectively improving the seismicperformance of the wall and reducing structural damage in high-rise buildings.