Abstract:To increase the applicability of the precast composite structure in low multiple-story buildings, the boundary connection of wall-slab based on monolithic precast composite structure was optimized, and a new total precast composite structure was proposed. Through the quasi-static tests of the total precast composite walls with horizontal joints using box connection, the seismic performance such as the failure mode, bearing capacity, behavior degradation law, and energy dissipation capacity of this kind of wall was studied, and the effects of different box connection details (wall shoes, integrated reinforcement, and distributed reinforcement) on the basic mechanical properties of the wall were compared and analyzed. The results showed that the total precast composite wall was a kind of structural member with lightweight, high strength, energy saving, and good seismic performance. All the specimens followed the failure path of three anti-seismic lines of “infills, middle rib-frame, and side rib column”, which highlighted the three-stage stress characteristics of the wall; Compared with the yield load and peak load of the DPC specimen (distributed reinforcement type), IPC (integrated reinforcement type) increased by 6% and 10% respectively, and WPC (wall shoes) increased by 2% and 5% respectively; The displacement ductility coefficient of all specimens was greater than 3.3, which met the seismic design requirements of reinforced concrete structures; The stiffness degradation law of all specimens was basically the same, and the stiffness degradation rate of DPC was the fastest; The cumulative energy consumption of all specimens showed a cumulative growth trend, and the cumulative energy consumption of IPC was 1.08 times that of WPC and 1.13 times that of DPC. The three different types of box connections had reliable connection performance, and the integrated reinforcement box connection had the best seismic performance. Its production and installation mode was also simpler and more efficient, which was more suitable for practical projects.