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research-article

PERFORMANCE CRITERIA FOR LIQUID STORAGE TANKS AND PIPING SYSTEMS SUBJECTED TO SEISMIC LOADING

[+] Author and Article Information
Maria Vathi

Department of Mechanical Engineering University of Thessaly Volos 38334, Greece
mvathi@mie.uth.gr

Spyros A. Karamanos

Department of Mechanical Engineering University of Thessaly Volos 38334, Greece
skara@mie.uth.gr

Ioannis A. Kapogiannis

Department of Civil Engineering National Technical University of Athens Athens 15780, Greece
xkapo@central.ntua.gr

Konstantinos V. Spiliopoulos

Department of Civil Engineering National Technical University of Athens Athens 15780, Greece
kvspilio@central.ntua.gr

1Corresponding author.

ASME doi:10.1115/1.4036916 History: Received March 15, 2016; Revised May 23, 2017

Abstract

In the present paper, performance criteria for the seismic design of industrial liquid storage tanks and piping systems are proposed, aimed at defining a performance-based design framework, to be used for reliable development of fragility curves and assessment of seismic risk. Considering “loss of containment” as the ultimate damage state, the proposed performance limits are quantified in terms of local quantities obtained from a simple and efficient earthquake analysis. Liquid storage tanks and the corresponding principal failure modes (elephant’s foot buckling, roof damage, base plate failure, anchorage failure and nozzle damage) are examined first. Subsequently, performance limits for piping systems are presented in terms of local strain at specific piping components (elbows, Tees and nozzles), against ultimate strain capacity (tensile and compressive) and low-cycle fatigue. Modeling issues for liquid storage tanks and piping systems are also discussed, for simple and efficient analysis that provides reliable estimates of local strain demand. These models are compared successfully with available experimental data. Using the above reliable numerical models, the proposed performance limits are applied in two case studies: (a) a liquid storage tank and (b) a piping system, both located in areas of high seismicity.

Copyright (c) 2017 by ASME
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