Abstract
When modeling RC shear wall buildings for seismic analysis there is little consensus in the literature on the appropriate value of the wall effective shear stiffness (GAeff) and the slab effective bending stiffness (EIeff). A probabilistic analysis based on fragility curves is a robust technique to assess the influence of these parameters on the expected seismic performance, but such studies are scarce because they require computationally expensive analysis such as Incremental Dynamic Analysis (IDA). In this paper, fragility curves are developed following the recently introduced SPO2FRAG procedure, a simplified methodology that does not require IDA but the computationally more affordable incremental static (pushover) analysis. The fragility curves provided by SPO2FRAG are used to evaluate the influence of the values of GAeff and EIeff on the analytical seismic response of full 3D nonlinear models of two actual (and representative) residential wall buildings of 17 and 26 stories located in Santiago (Chile). The accuracy of SPO2FRAG is also evaluated through comparisons with empirical fragilities.
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Acknowledgements
The authors are grateful to Professor Gabriel Candia of Universidad del Desarrollo (Santiago, Chile) for providing the seismic hazard curves, and to VMB Structural Engineering (Chile) for providing information on the case study buildings. The first author’s doctoral studies were financially supported by CONICYT through the CONICYT-PCHA/Doctorado Nacional/2015-21151184 scholarship. Further support was provided by the National Research Center for Integrated Natural Disaster Management (CIGIDEN) CONICYT/FONDAP/15110017 (Chile). This support is gratefully acknowledged.
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Ugalde, D., Lopez-Garcia, D. & Parra, P.F. Fragility-based analysis of the influence of effective stiffness of reinforced concrete members in shear wall buildings. Bull Earthquake Eng 18, 2061–2082 (2020). https://doi.org/10.1007/s10518-020-00786-3
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DOI: https://doi.org/10.1007/s10518-020-00786-3