Seismic performance of full-scale modular structural concrete insulated panel walls with socket connection

Abstract Structural concrete insulated panels (SCIPs) are an emerging construction technique for low-rise buildings that offer advantages such as lighter weight, thermal insulation, durability, and affordability over traditional methods. The versatility and practicality of SCIP can be enhanced with the use of modular SCIP (MSCIP), which utilizes precast technology for efficient construction, particularly for disaster-affected areas such as those impacted by earthquakes and hurricanes. However, there is a lack of study on the seismic performance of MSCIP. Therefore, this study investigates the seismic performance of full-scale MSCIP cantilever shear walls. Unlike the traditional use of starter bars for wall-to-footing connections, a new socket connection is proposed to improve tolerance and erection speed. The seismic performance of MSCIPs is investigated based on the test results of three full-scale MSCIP cantilever walls subjected to quasi-static cyclic loading. The experimental results demonstrated significant strength and ductility with plastic hinge formation at the base. The lateral load capacities of the specimens ranged from 17.49 to 19.64 kips. All specimens experienced significant strength degradation after reaching their peak strength, which was associated with mesh rupture within the plastic hinge region. Additionally, the specimens demonstrated good energy dissipation, with cumulative energy dissipation capacities ranging from 13.20 to 18.80 kJ. The specimens exhibited an average overstrength factor of 1.37 and displacement ductility of 4.11.