Fatigue Reliability under Nonstationary Loads: Model Application

This paper presents the numerical implementation of an analytic procedure for calculating the expected low-cycle fatigue damage for a structure subjected to a nonstationary load. This implementation investigates a spherical storage tank subjected to earthquake ground motions. Numerical modeling para...

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Bibliographic Details
Published in:Journal of structural engineering (New York, N.Y.) N.Y.), 1993-08, Vol.119 (8), p.2441-2460
Main Authors: Nielsen, Richard J, Long, Xiqin
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Exact sciences and technology
Stresses. Safety
Structural analysis. Stresses
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Summary:This paper presents the numerical implementation of an analytic procedure for calculating the expected low-cycle fatigue damage for a structure subjected to a nonstationary load. This implementation investigates a spherical storage tank subjected to earthquake ground motions. Numerical modeling parameters are selected to provide acceptable accuracy and efficient calculation time. The modeling parameters are normalized to permit their application to future studies.Physical modeling parameters, such as ground-motion intensity and duration, as well as material properties, such as cyclic strength and fatigue ductility, have a significant impact on the expected damage. Notch effects also affect the expected damage. For parameters representing a moderate earthquake and typical industrial structures and materials, the expected damage in the shell is found to be small. The accuracy of the analytic procedure was verified through Monte Carlo simulation.
ISSN:0733-9445
1943-541X
DOI:10.1061/(ASCE)0733-9445(1993)119:8(2441)