A Bouc-Wen model compatible with plasticity postulates

Charalampakis, AE; Koumousis, VK

dc.contributor.author	Charalampakis, AE	en
dc.contributor.author	Koumousis, VK	en
dc.date.accessioned	2014-03-01T01:29:31Z
dc.date.available	2014-03-01T01:29:31Z
dc.date.issued	2009	en
dc.identifier.issn	0022-460X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19285
dc.subject	Differential Equation	en
dc.subject.classification	Acoustics	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Mechanics	en
dc.subject.other	Damping	en
dc.subject.other	Plasticity	en
dc.subject.other	Stiffness	en
dc.subject.other	Unloading	en
dc.subject.other	Bouc-wen models	en
dc.subject.other	Hysteretic loops	en
dc.subject.other	Hysteretic phenomenon	en
dc.subject.other	Modified models	en
dc.subject.other	Seismic excitations	en
dc.subject.other	Hysteresis	en
dc.title	A Bouc-Wen model compatible with plasticity postulates	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jsv.2008.11.017	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jsv.2008.11.017	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	The versatile Bouc-Wen model has been used extensively to describe hysteretic phenomena in various fields of engineering. Nevertheless, it is known that it exhibits displacement drift, force relaxation and nonclosure of hysteretic loops when subjected to short unloading-reloading paths. Consequently, it locally violates Drucker's or Ilyushin's postulate of plasticity. In this study, an effective modification of the model is proposed which eliminates these problems. A stiffening factor is introduced into the hysteretic differential equation which enables the distinction between virgin loading and reloading. Appropriate reversal points are utilized effectively to guide the entire process. It is shown that the proposed modification corrects the nonphysical behavior of the model tinder short unloading-reloading paths without affecting its response in all other cases. It is further demonstrated that the original and modified model exhibit significantly different response under seismic excitation. (C) 2008 Elsevier Ltd. All rights reserved.	en
heal.publisher	ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD	en
heal.journalName	Journal of Sound and Vibration	en
dc.identifier.doi	10.1016/j.jsv.2008.11.017	en
dc.identifier.isi	ISI:000265793300021	en
dc.identifier.volume	322	en
dc.identifier.issue	4-5	en
dc.identifier.spage	954	en
dc.identifier.epage	968	en