This chapter delves into the structural behavior of curved steel-concrete-steel (SCS) sandwich shells infilled with ultra-lightweight cement composite (ULCC) for Arctic ice-resistant platforms. The study introduces a conical structure with SCS sandwich shells, tested quasi-statically under patch loading to simulate ice forces exceeding 100 MN. Experimental findings show that structural failure modes such as flexural, shear compression, shear tension, and plastic hinge mechanisms depend on rise-to-span (r/L) and span-to-core thickness (L/hc). A non-linear finite element model, incorporating material nonlinearity, steel-concrete interaction, and J-hook shear connectors, accurately simulates the experimental observations. Parametric studies highlight the effects of various parameters on shear performance. Results show that failure modes changes with geometric parameters with flexure/transverse shear at low r/L, shear compression/tension or a three-hinge mechanism at higher curvature. Shear resistance increases by 320% as r/L ascends from 0 to 0.17, while it decreases by 50% as r/L reaches 0.5. Thicker face plates and closer connector spacing augment composite action and shear resistance, while asymmetric loading reduces capacity by 25%. Curved SCS panels show higher contact-pressure resistance than flat panels and satisfy ISO 19906 ice-load demands. A modified Eurocode 2 model is proposed to capture force transfer and punching shear, addressing traditional method limitations.