Performance of Liquid Storage Tanks during the 1989 Loma Prieta Earthquake

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by Medhat A. Haroun, Univ of California, Irvine, United States,
Sherif A. Mourad, Univ of California, Irvine, United States,
Wajdi Abou-Izzeddine, Univ of California, Irvine, United States,

Document Type: Proceeding Paper

Part of: Lifeline Earthquake Engineering:

Abstract: Utilities and industrial facilities in the strong shaking area of the 1989 Loma Prieta earthquake include a large inventory of tanks of all types. The earthquake induced a few incidents of damage to tanks of old and modern design, and even to a retrofitted tank. This paper documents the performance of tank structures during this seismic event through a detailed description of the damage sustained by ground-based petroleum and water storage tanks and by elevated water tanks. It appears that site amplification of the long period ground motion components was a cause of large amplitude sloshing and the associated damage to tanks built on Bay Mud. It is also apparent that design procedures for ground-based unanchored tanks require a substantial updating to reflect the recent technical advances and the lessons learned for such a type of tanks.

Subject Headings: Storage tanks | Water tanks | Water storage | Earthquakes | Petroleum | Seismic design | Load and resistance factor design | North America | California | United States

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