000013289 001__ 13289
000013289 005__ 20161114160335.0
000013289 04107 $$aeng
000013289 046__ $$k2009-06-22
000013289 100__ $$aCharalampakis A., E.
000013289 24500 $$aImplementing an improved bouc-wen model to account for plasticity postulates

000013289 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013289 260__ $$bNational Technical University of Athens, 2009
000013289 506__ $$arestricted
000013289 520__ $$2eng$$aThe versatile Bouc-Wen model has been used extensively to describe hysteretic phenomena in various fields of engineering. Nevertheless, it is known to exhibit 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 implemented 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 fully corrects the nonphysical behavior of the model. It is further demonstrated that the original and modified model may exhibit significantly different response under seismic excitation.

000013289 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013289 653__ $$aBouc-Wen, Drucker’s postulate, Ilyushin’s postulate, displacement drift, force relaxation. Abstract. The versatile Bouc-Wen model has been used extensively to describe hysteretic phenomena in various fields of engineering. Nevertheless, it is known to exhibit 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 implemented 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 fully corrects the nonphysical behavior of the model. It is further demonstrated that the original and modified model may exhibit significantly different response under seismic excitation.

000013289 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013289 720__ $$aCharalampakis A., E.$$iKoumousis V., K.
000013289 8560_ $$ffischerc@itam.cas.cz
000013289 8564_ $$s1669969$$uhttps://invenio.itam.cas.cz/record/13289/files/CD430.pdf$$yOriginal version of the author's contribution as presented on CD, section: Nonlinear dynamics (MS).
000013289 962__ $$r13074
000013289 980__ $$aPAPER