Conference Proceedings

A hysteretic MDOF model for dynamic analysis of offshore towers

P Paevere, N Haritos, GC Foliente, P Grundy (ed.), J Koo (ed.), I Langen (ed.), JM Roesset (ed.)

PROCEEDINGS OF THE EIGHTH INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE, VOL 4 | INTERNATIONAL SOCIETY OFFSHORE& POLAR ENGINEERS | Published : 1998

Abstract

A lumped mass MDOF model for offshore platforms under extreme deterministic loads is developed. The model includes hysteretic elements that account for highly nonlinear and degrading structural behavior. Dynamic analyses of an example tower (in still water) are performed using different hysteresis parameters for these elements. It is shown that degrading hysteretic behavior can cause a significant increase in the variability of the displacement response time history, when compared with elastoplastic behavior.

University of Melbourne Researchers