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Seismic Response and Buckling behavior of Aboveground Cylindrical Steel Tanks

Sobhan, Mohammad Saeed | 2017

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 49960 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Rahimzadeh Rofooei, Fayaz; Khaje Ahmad Attari, Nader
  7. Abstract:
  8. In this study, the seismic response of aboveground, anchored cylindrical steel tanks subjected to horizontal and vertical ground acceleration is investigated. The buckling capacity of the steel tanks is estimated using static pushover (SPO) and incremental dynamic analyses (IDA). Finite element models of a broad tank and a tall tank with height to diameter ratios (H/D) of 0.40, 0.80 and with a liquid level of 90% of the height of the cylinder were used in this study. Appropriate load patterns due to the horizontal and vertical components of ground excitations are utilized for SPO analyses. The influence of the vertical component of ground acceleration on buckling capacity curve of the tank has been investigated by static pushover analysis with different vertical to horizontal acceleration ratio, av/ah, of 0.33, 0.67 and 1.0. The buckling capacity curves and critical buckling loads computed using SPO analyses are compared to those obtained from IDA. A proper vertical to horizontal acceleration ratio (av/ah) for SPO analysis is proposed that leads to good agreement between SPO and IDA results
  9. Keywords:
  10. Static Pushover Analysis ; Incremental Dynamic Analysis ; Vertical Excitation ; Cylindrical Steel Tanks ; Seismic Response ; Aboveground Anchored Steel Tanks ; Static Buckling ; Dynamic Buckling

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