Seismic Reliability Analysis for Elevated Pressure Vessels

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by Albert T. Y. Tung, Stanford Univ, United States,
Anne S. Kiremidjian, Stanford Univ, United States,

Document Type: Proceeding Paper

Part of: Structural Safety and Reliability

Abstract: This paper presents two approaches for assessing the seismic reliability of elevated pressure vessels. A discretized mass mechanical system is used to model the dynamic effects of liquid sloshing. The first approach computes the annual failure probabilities of the structural components at intact state. The second approach obtains the most likely progressive failure paths and the overall system reliability utilizing the system reliability analysis program FAILSF developed at Stanford. The two methods are applied to analyze the seismic performance of an elevated spherical tank of 20m diameter located in the San Francisco Bay Area. The results are compared with the results obtained from a random vibration analysis employing the stochastic equivalent linearization technique.

Subject Headings: Pressure vessels | Seismic tests | Stochastic processes | Seismic effects | Dynamic structural analysis | System reliability | Failure analysis | Vibration | North America | California | San Francisco Bay Area | United States

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