Journal
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
Volume 74, Issue -, Pages 46-55Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.soildyn.2015.03.006
Keywords
Reinforced concrete containment building; Mainshock-aftershock; Seismic analyses
Funding
- National Natural Science Foundation of China [51322801, 51238012, 91215301]
- Program for International Science and Technology Cooperation Projects of China [2012DFA70810]
- Program for New Century Excellent Talents in University of Ministry of Education of China [NCET-11-08]
- National Science and Technology Major Project [2013zx06002001-09]
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A large mainshock may trigger numerous aftershocks within a short period, and nuclear power plant (NPP) structures have the probability to be exposed to mainshock-aftershock seismic sequences. However, the researchers focused on seismic analyses of reinforced concrete containment (RCC) buildings under only mainshocks. The aim of this paper is to thoroughly investigate the dynamic responses of a RCC building under mainshock-aftershock seismic sequences. For that purpose, 10 as-recorded mainshock-aftershock seismic sequences with two horizontal components are considered in this study, and a typical three-dimensional RCC model subjected to the selected as-recorded seismic sequences is established. Peak ground accelerations (PGAs) of mainshocks equal to 0.3 g (safe shutdown earthquake load-SSE load) are considered in this paper. The results indicate that aftershocks have a significant effect on the responses of the RCC in terms of maximum top accelerations, maximum top displacements and accumulated damage. Furthermore, in order to preserve the RCC from large damage under repeated earthquakes, local damage and global damage indices are suggested as limitations under only mainshocks. (C) 2015 Elsevier Ltd. All rights reserved.
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