Loading...

Strengthening of Liquid Storage Tanks by Frictional Damper

Kaboodanian, Hamid | 2010

770 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40723 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Moghaddam, Hassan
  7. Abstract:
  8. Considering the role of fluid storage tanks within or after an earthquake and the irreparable damages from their destruction that arise from the nature of the fluids of flammable or toxic nature stored in those tanks, it is very important to ensure stability and durability of the tanks when an earthquake is occurring. One of the most important damages to storage tanks within the past earthquakes has been lack of stability of their walls taking place in the form of elephant buckling. A certain storage tank was subject to a case study in this research and the tank's body, foundation, anchorages, the tread between the fluid and tank's body and between the bottom sheet and foundation were modeled by using finite elements method and Ansys software; their interactions were taken into consideration and the stability of the tank was studied. In a second step, the tank under the previous study with different body thicknesses and anchorages was subjected to harmonic horizontal records with various ranges and identical periods. The anchorage studied in this step includes the anchorage in conformity to the anchorages illustrated in the componential plans of the case study that is according to API 650 standard. Another kind of tanks are those standing on their foundations gravitationally and they are connected to the foundation at the bottom by friction dampers. Dampers isolate the tank at the level of the foundation and the sum of anchorages acts as an isolator that prevents instability of the body and elephant buckling as it has been shown in the study. Considering easy fixation of friction dampers on the existing tanks this method may be a proper method of for tanks strengthening

  9. Keywords:
  10. Finite Element Method ; Fluid-Structure Interaction ; Friction Damper ; Strengthening (Metal) ; Liquid Storage Tanks ; Elephant Buckling

 Digital Object List

 Bookmark

No TOC