Vibration investigation on fluid-structure interaction of AP1000 shield building subjected to multi earthquake excitations. (April 2019)

• Record Type: Journal Article
• Authors: Wang, Dayang; Wu, Chengqing; Huang, Wencheng; Zhang, Yongshan
• Is Part Of: Annals of nuclear energy. Volume 126(2019)
• Page Start: 312
• Page End: 329
• Publication Date: 2019-04
• Subjects: Fluid-structure interaction -- AP1000 nuclear power plant -- Seismic performance -- Time history analysis -- Finite element; Nuclear energy -- Periodicals; Nuclear engineering -- Periodicals; 621.4805
• DOI: 10.1016/j.anucene.2018.11.021
• Languages: English
• ISSNs: 0306-4549

Abstract

Highlights: FSI effect on structural dynamic responses of AP1000 shield building with filled and empty water tanks are studied in multi three-direction earthquakes. The most reasonable height of water level for reducing seismic response under inputs of multi earthquake excitations are explored and suggested. AP1000 Shield building with water partially-filled in the water tank appears to have obvious FSI effect, which generates great influence on structural dynamic characteristics and responses. Abstract: Fluid-structure interaction (FSI) between water and water tank of AP1000 nuclear power plant has always been a hot topic because the gravity water tank plays a key role in protecting structural safety in an emergency such as an earthquake. The main target of this study is to investigate the FSI effect on structural dynamic responses of AP1000 shield building with filled and empty water tanks and to explore the most reasonable height of water level for reducing seismic response under inputs of multi three-direction earthquake excitations. For this purpose, method of nonlinear FSI algorithm of finite element is employed based on ANSYS platform. The numerical procedure is validated by comparison with theoretical calculation and existing experimental results of fluid free vibration and structural seismic responses in the situation of El Centro wave. Based on the validated numerical model, a series of numerical simulations on seven partially-filled models in six natural and one artificial earthquake are carried out and corresponding results, such as peak acceleration & displacement, floor response spectrum and structural base shear, are studied comparatively in details. Discussions of this study show that the partially-filled shield building appears significant FSI effect, which generates great influence on structural dynamic characteristics and responses. Reasonable design of the water level can contribute to reducing structural responses and improving seismic safety.