PERFORMANCE CRITERIA FOR THE SEISMIC DESIGN OF LIQUID STORAGE TANKS AND PIPING SYSTEMS

Abstract eng:
Industrial facilities, e.g. power/chemical/petrochemical plants, terminals, and their components, such as liquid storage tanks and piping systems, when subjected to seismic loading, may exhibit significant damage, which may threaten their structural integrity with severe consequences on the population, the environment and the economy. Recently, several attempts have been reported to apply performance-based design (PBD) methodologies in the seismic design of industrial components (liquid storage tanks and piping systems). Within this PBD framework, it is necessary to quantify all possible failure modes in terms of seismic response parameters, also referred to as Engineering Demand Parameters (EDPs) and to define appropriate performance levels, which classify the severity of damage. The present study is aimed at defining a PBD framework for piping systems and liquid storage tanks (including the effects of uplifting in unanchored tanks), through appropriate quantification of the failure modes and definition of seismic performance levels, considering available test results, numerical simulation results and engineering judgment.

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