Earthquakes and Structures

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Evaluation of the seismic response of liquid storage tanks

  • Vern, Sourabh (National Centre for Disaster Mitigation and Management, Malaviya National Institute of Technology Jaipur, Jawahar Lal Nehru Marg) ;
  • Shrimali, Mahendra K. (National Centre for Disaster Mitigation and Management, Malaviya National Institute of Technology Jaipur, Jawahar Lal Nehru Marg) ;
  • Bharti, Shiv D. (National Centre for Disaster Mitigation and Management, Malaviya National Institute of Technology Jaipur, Jawahar Lal Nehru Marg) ;
  • Datta, Tushar K. (National Centre for Disaster Mitigation and Management, Malaviya National Institute of Technology Jaipur, Jawahar Lal Nehru Marg)
  • Received : 2019.08.31
  • Accepted : 2021.07.21
  • Published : 2021.08.25
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Abstract

The paper presents a few case studies on the seismic response behavior of liquid storage tanks (LSTs), for which not much literature is available. They include (i) the comparison between responses obtained by the 2D-FE analysis and analysis performed according to the procedure recommended by ACI 350.3 for different PGA levels of ground motions; (ii) the comparison between the variations of sloshing heights, base shear, and overturning moment with the PGA obtained by the 2D- and 3D-FE analyses; (iii) the effect of bi- and tri-directional earthquake interactions on different responses; and (iv) the effect of angle of incidence of the earthquake on those responses. The numerical study is conducted with a square tank of size 6 m × 6 m × 4.8 m. To make the study a comprehensive one, four different types of earthquake ground motions, three ratios between the components of the earthquake, and three PGAs are considered. The results of the study show that the ACI 350.3 procedure underestimates the responses as compared to the 2D-FE analysis; the angle of incidence and vertical component of earthquakes have a moderate influence on the hoop stress, sloshing height, and top board displacement; 3D-FE modeling of the LST with simultaneous application of the three components of the earthquake is essential for the correct evaluation of its responses.

Keywords

References

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