Tsioulou, A; Galasso, C; (2017) Intensity Measures and Statistical Approaches for the Engineering Validation of Ground Motion Simulations. In: Proceedings of the 16th World Conference on Earthquake Engineering, 16WCEE 2017. (pp. pp. 1-13). National Information Centre of Earthquake Engineering (NICEE)

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Abstract

The aim of this article is twofold: first, we propose a list of five ground motion intensity measures (IMs) that act as proxies for the (nonlinear) seismic response of more complex engineered systems, and can therefore be used to validate ground motion simulation methods for engineering applications. The proposed list of IMs include both spectral shape and durationrelated proxies, shown to be the optimal IMs in several probabilistic seismic demand models of different structural types, within the framework of Performance-Based Earthquake Engineering. Second, we propose two quantitative approaches for the engineering validation of ground motion simulations, namely statistical hypothesis testing and information theory measures. We then demonstrate the application of these parameters and validation approaches to ground motion simulations computed using a variety of methods, including the Graves and Pitarka hybrid broadband method, the deterministic Composite Source Model (CSM) method and the stochastic white noise (EXSIM) finite-fault model. These types of validation exercises can highlight the similarities and differences between simulated and recorded ground motions for a given simulation method. The similarities should provide confidence in using the simulation method for engineering applications, while the discrepancies, should help in improving the generation of synthetic records.

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