Evaluation of the Methods for Response Analysis under Non-Stationary Excitation. (1999)

• Record Type: Journal Article
• Authors: Jangid, R.S.; Datta, T.K.
• Is Part Of: Shock and vibration. Volume 1999(1999)
• Page Start: 285
• Page End: 297
• Publication Date: 1999
• Subjects: Non-stationary -- earthquake -- quasi-stationary -- comparative performance -- Markov method; Shock (Mechanics) -- Periodicals; Vibration -- Periodicals; 534.5
• DOI: 10.1155/1999/312010
• Languages: English
• ISSNs: 1070-9622

Abstract

Abstract : Response of structures to non-stationary ground motion can be obtained either by the evolutionary spectral analysis or by the Markov approach. In certain conditions, a quasi-stationary analysis can also be performed. The first two methods of analysis are difficult to apply for complex situations such as problems involving soil-structure interaction, non-classical damping and primary-secondary structure interaction. The quasi-stationary analysis, on the other hand, provides an easier solution procedure for such cases. Here-in, the effectiveness of the quasi-stationary analysis is examined with the help of the analysis of a single degree-of-freedom (SDOF) system under a set of parametric variations. For this purpose, responses of the SDOF system to uniformly modulated non-stationary random ground excitation are obtained by the three methods and they are compared. In addition, the relative computational efforts for different methods are also investigated.