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Structural Assessment of a Cylindrical Liquid Tank due to Shape Change of Roof during Sloshing Induced by Seismic Activity

  • Research Article-Mechanical Engineering
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Abstract

The structural behavior of ground supported upright cylindrical fluid tank subjected to lateral excitations due to the seismic effects is presented by considering both below and convective resonance scenarios using the FSI approach. The study of seismic response has been carried out at an actual scale on a typical API Tank of 23,000 gallons capacity. In response to seismic excitations with peak acceleration of 0.3 g, the sloshing phenomena have been studied at three fill levels. For minimizing the roof stresses in the API tank due to seismic sloshing, the roof design is modified by varying roof angles starting from flat to 30° conical roof angles with an increment of 10°. It is found that for flat roof steel tank operating at convective resonance, stress increases exponentially with the fill level resulting in tank yielding. To increase tank seismic resistance, a self-supported conical roof (SSCR) of various angles is considered. The effect of variation of SSCR angle and slenderness ratio on structural response has been studied. Using the design by analysis approach, empirical relationships for estimation of tank structural strength (TSS) and total deformations have been proposed. It is concluded that the TSS is increased up to 6 times by selecting an appropriate conical roof (30°).

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Authors and Affiliations

  1. Department of Mechanical Engineering, PIEAS, Islamabad, Pakistan

    Yasir Zulfiqar, Ahmad Jehanzeb & Asim Zulfiqar

  2. Department of Mechanical Engineering, CUST, Islamabad, Pakistan

    M. Javed Hyder

  3. School of Mechanical Engineering, Sungkyunkwan University, Suwon, 16419, South Korea

    Hafiz Waqar Ahmad

  4. School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, South Korea

    Umer Masood Chaudry

Authors
  1. Yasir Zulfiqar
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  2. M. Javed Hyder
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  3. Ahmad Jehanzeb
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  4. Hafiz Waqar Ahmad
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  5. Asim Zulfiqar
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  6. Umer Masood Chaudry
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Correspondence to Umer Masood Chaudry.

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Zulfiqar, Y., Hyder, M.J., Jehanzeb, A. et al. Structural Assessment of a Cylindrical Liquid Tank due to Shape Change of Roof during Sloshing Induced by Seismic Activity. Arab J Sci Eng 46, 8075–8085 (2021). https://doi.org/10.1007/s13369-021-05588-6

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  • DOI: https://doi.org/10.1007/s13369-021-05588-6

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