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Application of Tuned Mass Dampers in Controlling the Seismic Response of Anchored and Unanchored Steel Cylindrical Storage Tanks with Fixed Roof

Shahrouz Sotudeh, Ali | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53126 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Rahimzadeh Rofuei, Fayyaz
  7. Abstract:
  8. This research aims to study the applicability of tuned mass dampers (TMDs) in mitigating the seismic responses of cylindrical, fixed-roof steel storage tanks. The finite element models used in this study are prepared in ABAQUS/CAE 2017 and include a cylindrical tank with a diameter of 30 meters, height of 12 meters that contains water up to level 10.8 meters. Shell courses have been designed in accordance with API 650 seismic provisions. The considered TMDs are two slender cylindrical tanks with the same height as that of the main tank and a diameter of 3 meters, placed by the sides of the main tank symmetrically, and are attached to it using spring elements. To maximize the effect of TMDs in reducing the seismic response of the main tank, the considered TMDs are connected to the main tank using three different connection configurations as well as mass ratios. In order to quantify the performance of the TMDs, the maximum values of the base shear, overturning moment and the sloshing wave height of the tank content both with and without application of TMD under seven different accelerograms were evaluated and compared. In case of unanchored tanks, uplift response was also investigated. The results indicate that TMD was able to reduce the anchored tank’s base shear and overturning moment responses by 16.5% and 17.8%, respectively. However, the decrease in the overturning moment of the unanchored tank was merely 5.9% which implies the need for further studies
  9. Keywords:
  10. Cylindrical Tanks ; Tuned Mass Damper (TMD) ; Anchored Cylindrical Tank ; Unanchored Cylindrical Tank ; Seismic Analysis ; Seismic Response

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