Earthquakes and Structures

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Shock absorption of concrete liquid storage tank with different kinds of isolation measures

  • Jing, Wei (Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology) ;
  • Chen, Peng (Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology) ;
  • Song, Yu (Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology)
  • Received : 2019.11.07
  • Accepted : 2020.03.20
  • Published : 2020.04.25
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Abstract

Concrete rectangular liquid storage tanks are widely used, but there are many cases of damage in previous earthquakes. Nonlinear fluid-structure interaction (FSI) is considered, Mooney-Rivlin material is used for rubber bearing, nonlinear contact is used for sliding bearing, numerical calculation models of no-isolation, rubber isolation, sliding isolation and hybrid isolation concrete rectangular liquid storage tanks are established; dynamic responses of different structures are compared to verify the effectiveness of isolation methods; and influences of earthquake amplitude, bidirectional earthquake and far-field long-period earthquake on dynamic responses are investigated. Results show that for liquid sloshing wave height, rubber isolation cause amplification effect, while sliding isolation and hybrid isolation have reduction effect; displacement of rubber isolation structure is much larger than that of sliding isolation with limiting-devices and hybrid isolation structure; when PGA is larger, wall cracking probability of no-isolation structure becomes larger, and probability of liquid sloshing wave height and structure displacement of rubber isolation structure exceeds the limit is also larger; under bidirectional earthquake, occurrence probabilities that liquid sloshing wave height and structure displacement of rubber isolation structure exceed the limit will be increased; besides, far-field long-period earthquake mainly influences structure displacement and liquid sloshing wave height. On the whole, control effect of sliding isolation is the best, followed by hybrid isolation, and rubber isolation is the worst.

Keywords

Acknowledgement

This paper is a part of the National Natural Science Foundation of China (Grant number: 51908267), a part of the China Postdoctoral Science Foundation (Grant number: 2018M633652XB), a part of the Hongliu Outstanding Young Talents Support Program of Lanzhou University of Technology (Grant number: 04-061807), a part of the Open Foundation of International Research Base on Seismic Mitigation and Isolation of Gansu Province (Grant number: GII2019-N03) and a part of the Innovation Ability Improvement Project of Colleges and Universities in Gansu Province (2019A-021).

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