Damage development analysis of the whole nuclear power plant of AP1000 type under strong Main-aftershock sequences

Chen, Wanruo; Zhang, Yongshan; Wang, Dayang

doi:10.1016/j.nucengdes.2020.110975

Cited by 8 publications

(1 citation statement)

References 25 publications

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“…The results show that compared with the ground structure, the aftershock makes the damage probability of the mountain step-terrace structure higher, the CMR of the mountain step-terrace structure smaller, and the collapse safety reserve lower, but the actual discussion is only the step-terrace structure, and there is no relevant parameter for the mountain. Chen et al 13 investigated the seismic damage analysis of the AP1000 nuclear power plant under the action of the main-aftershock sequence. Their research indicated that the aggravating effect of the aftershock damage was mainly caused by the reinforced concrete auxiliary building of the nuclear power plant, and the concrete tensile damage under the main-aftershock sequence was more serious than the compressive damage.…”

Section: Introductionmentioning

confidence: 99%

Seismic fragility analysis of the inter-story isolated structure for the influence of main-aftershock sequences

Yang

Liu

Lei

et al. 2023

Advances in Mechanical Engineering

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The inter-story isolated structure is an effective and feasible structure seismic technology and system, but most studies on inter-story isolated structures only consider the mainshock. A strong mainshock is usually accompanied by multiple aftershocks, the structure will be damaged under the action of the mainshock. Because of the short time interval between the main shock and the aftershocks, the structure is often not repaired in time, so it will be further damaged under the action of the aftershock. Therefore, it is meaningful to study the fragility of inter-story isolated structures under the action of main-aftershock sequences. In this study, the incremental dynamic analysis method was used, and the inter-story isolated structure of a frame shear wall was established. The vulnerability curves of each substructure under the action of a single mainshock and main-aftershock sequence were compared. A series structure system was used to calculate the overall vulnerability of the inter-story isolated structure. The vulnerability curves of different isolation layer setting positions and isolation bearing stiffness under the action of a single mainshock and main-aftershock were compared, and the collapse margin ratio (CMR) of the structure given. The results show that aftershocks increase the exceedance probability of each substructure, and with an increase in the limit state, the influence of aftershocks is more obvious. An appropriate isolation layer design reduces the influence of aftershocks and the exceedance probability of the entire structure.

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Section: Introductionmentioning

confidence: 99%