1992 Volume 1992 Issue 446 Pages 69-76
The objective of this paper is to construct a method of evaluating the dynamic collapse of an SDOF system with the degrading restoring force characteristics under random excitation. Firstly, an extensive parametric study is carried out to investigate the duration up to the dynamic ultimate state of the system and the power, when the system is subjected to the combined harmonic disturbing force. Secondly, through the results, a method of evaluating the dynamic collapse of the system subjected to a random excitation is proposed, in which the random excitation is replaced by a harmonic disturbing force of the resonance frequency. Finally, numerical examples are developed to illustrate the application of the method.
