Seismic performance of reinforced concrete open-web sandwich slab-column structures for high-rise long-span buildings under rare earthquakes

To meet the demands of high-rise buildings for long-span spatial layout, low-carbon design and energy conservation, and to break through the application limitations of reinforced concrete open-web sandwich slab structures in high-rise buildings, this study proposes a structure similar to the box-type structure, namely the reinforced concrete open-web sandwich slab-column (RCOSSC) structure. Presently, there is insufficient research evidence to verify whether the RCOSSC can satisfy the overall seismic performance requirements of buildings. To address this issue, this paper verifies the seismic performance of the material and structure through scaled structural tests and multi-software modeling verification. Additionally, the damage resistance of the structure and material is validated via both experimental and simulation methods. Through comparative modeling analysis, the RCOSSC structure maintains its integrity under rare earthquakes, with the inter-story drift angle not exceeding the collapse limit. Engineering simulations confirm that it meets the Grade C high-performance seismic standard, remaining elastic under frequent earthquakes, avoiding collapse under rare earthquakes, and featuring controllable damage. This study provides an industrialized and green structural solution for high-rise long-span buildings.