Seismic response characteristics of base-isolated AP1000 nuclear shield building subjected to beyonddesign basis earthquake shaking

다국어 초록 (Multilingual Abstract)

Because of the design and construction requirements, the nuclear structures need to maintain thestructural integrity under both design state and extreme earthquake shaking. The base-isolation technologycan significantly reduce the damages of structures under extreme earthquake events, andeffectively protect the safeties of structures and internal equipment. This study proposes a base-isolationdesign for the AP1000 nuclear shield building on considering the performance requirements of theseismic isolation systems and devices of shield building. The seismic responses of isolated and nonisolatedshield buildings subjected to design basis earthquake (DBE) shaking and beyond-design basisearthquake (BDBE) shaking are analyzed, and three different strategies for controlling the displacementssubjected to BDBE shaking are performed. By comparing with nonisolated shield buildings, the flooracceleration spectra of isolated shield buildings, relative displacement, and base shear force are significantlyreduced in high-frequency region. The results demonstrate that the base-isolation technology isan effective approach to maintain the structural integrity which subjected to both DBE and BDBE shaking.
A displacement control design for isolation layers subjected to BDBE shaking, which adopts fluiddampers for controlling the horizontal displacement of isolation layer is developed. The effectiveness ofthis simple method is verified through numerical analysis

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