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Fatigue Life Analysis of Storage Tanks In-Service Based on Exponential Curve Settlement Prediction Model

[+] Author Affiliations
Delin Zhang, Zhiping Chen, You Li

Zhejiang University, Hangzhou, China

Paper No. PVP2018-84431, pp. V005T10A008; 10 pages
doi:10.1115/PVP2018-84431
From:
  • ASME 2018 Pressure Vessels and Piping Conference
  • Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition
  • Prague, Czech Republic, July 15–20, 2018
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5166-1
  • Copyright © 2018 by ASME

abstract

In order to study the structural fatigue safety of in-service fixed roof storage tanks after uneven settlement, an exponential curve method of settlement prediction has been constructed. A finite element model based on the contact condition between the elastic ring beam foundation and the tank base was also proposed. On the basis of above, a fatigue life prediction method of in-service storage tanks based on the settlement prediction model has been established. Combined with the engineering example of an in-service tank, the structural fatigue safety under the actual uneven settlement was analyzed. The results indicate that the trend of foundation settlement with time could be predicted accurately and the contact condition between base and foundation could be simulated simultaneously. Subsequently, the in-service tank’s structural fatigue life under the uneven settlement could be predicted.

Copyright © 2018 by ASME

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