Reliability Analysis of Single-Degree-of-Freedom Elastoplastic Systems. II: Suboptimal Excitations

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dc.contributor.authorAu, S.
dc.contributor.authorLam, H.
dc.contributor.authorNg, C.
dc.date.issued2007
dc.description.abstractA method for constructing an approximation of the critical excitation that drives an elastoplastic system from rest to a target threshold at a specified time instant, referred to as the "suboptimal excitation," is presented in this paper. It is based on the observations gained from study of the critical excitations in the companion paper. Essentially, for the usual case of interest where the failure time is not small compared to the natural period, the duration of the positive and negative pulses of the critical excitation are roughly equal to half of the natural period. This consideration allows for a simple intuitive approximation of the critical excitation. The amplitudes of the positive and negative pulses are obtained in closed forms using energy balance. Numerical investigations show that the critical excitations are well approximated by the suboptimal excitations. © 2007 ASCE.
dc.description.statementofresponsibilitySiu-Kui Au, Heung-Fai Lam and Ching-Tai Ng
dc.identifier.citationJournal of Engineering Mechanics, 2007; 133(10):1081-1085
dc.identifier.doi10.1061/(ASCE)0733-9399(2007)133:10(1081)
dc.identifier.issn0733-9399
dc.identifier.issn1943-7889
dc.identifier.urihttp://hdl.handle.net/2440/65131
dc.language.isoen
dc.publisherASCE-Amer Soc Civil Engineers
dc.rights© 2007 ASCE
dc.source.urihttps://doi.org/10.1061/(asce)0733-9399(2007)133:10(1081)
dc.subjectCritical load
dc.subjectElastoplasticity
dc.subjectMonte Carlo method
dc.subjectStructural reliability
dc.subjectVibration
dc.subjectExcitation.
dc.titleReliability Analysis of Single-Degree-of-Freedom Elastoplastic Systems. II: Suboptimal Excitations
dc.typeJournal article
pubs.publication-statusPublished

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