Default Dispersion Measures for Simplified Probabilistic Assessment of RC Frames

Peter Fajfar in Mirko Kosič (2012) Default Dispersion Measures for Simplified Probabilistic Assessment of RC Frames. V: 15WCEE: 15th World Conference on Earthquake Engineering, 24-28 Sep 2012, Lisbon.

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Povzetek

In the paper, a preliminary version of the methodology for determination of default dispersion measures for RC frames is developed. In order to reduce the computational work, a simplified two-step procedure for determination of dispersion measures is proposed. In the first step, statistical characteristics of global system parameters are determined by means of nonlinear static (pushover) analysis and consecutive idealization of pushover curves. In the second step, total dispersion of response is determined by Incremental Dynamic Analyses (IDA) for a group of equivalent SDOF systems and a group of ground motion records. The characteristics of SDOF structural models are generated based on the data from the first step. The effectiveness of the proposed approach and recently developed practice-oriented approach for probabilistic seismic assessment of building structures is tested on the selected result of a four storey building. Good agreement between the results obtained by both simplified approaches and results obtained by more “accurate” procedures is observed.

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