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摘要:
In RC flat plate structures, slab-column joints play a key role in transferring the gravity load from the slabs to the columns due to the absence of beam elements. If one or more columns of a flat plate structure are damaged in an accidental event, the load redistribution process may trigger punching shear failures at the adjacent slab-column joints. Progressive collapse of a large portion of the structure, or even its entirety, is like to occur following punching failure propagations. Given that progressive collapse is a dynamic phenomenon, investigating the dynamic responses of the structure under sudden column removal scenarios are imperative. In this study, a high-fidelity numerical model is developed to simulate the dynamic behavior of a multi-panel flat plate substructure under a sudden removal of an interior column. The model is validated by three sequential experimental tests on the same substructure, by which the load responses of the interior column stub, the slab deflections and the crack patterns are verified. Based on the validated model, the dynamic load redistribution patterns of the three tests are evaluated. Two series of parametric studies are also conducted to investigate the influence of the load level on the slab overhangs and the load release speed on the slab deflections. © 2022 the Author(s).
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年份: 2023
页码: 645-649
语种: 英文
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