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Article type: Research Article
Authors: Jangid, R.S.; | Datta, T.K.
Affiliations: Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai – 400076, India | Department of Civil Engineering, Indian Institute of Technology Delhi, Hauzkhas, New Delhi – 110016, India
Note: [] Corresponding author.
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.
Keywords: Non‐stationary, earthquake, quasi‐stationary, comparative performance, Markov method
Journal: Shock and Vibration, vol. 6, no. 5-6, pp. 285-297, 1999
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