Abstract
The structural robustness, that characterizes the available margin of safety against the structural collapse subjected to material uncertainty, is significant in earthquake engineering. Robustness Index is defined as the ratio of mean annual frequency of exceeding a given limit state of interest neglecting structural uncertainties to the mean annual frequency of exceeding a given limit state of interest considering all the uncertainties is often used to quantify the structural robustness. The current study quantifies the Robustness Index of a four-storey steel moment-resisting frame. Incremental Dynamic Analysis is carried out to obtain the inter-storey drift and collapse fragilities. Finally, this study estimates the robustness index in terms of Uncertainty Robustness Index and corresponding modification factors for design strength reduction factors corresponding to different hazards levels.
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Shaijal, K.M., Pandikkadavath, M.S., Mangalathu, S., Davis, R. (2022). Material Uncertainty Based Seismic Robustness Assessment of Steel Moment-Resisting Frames. In: Ghosh, C., Kolathayar, S. (eds) A System Engineering Approach to Disaster Resilience. Lecture Notes in Civil Engineering, vol 205. Springer, Singapore. https://doi.org/10.1007/978-981-16-7397-9_35
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DOI: https://doi.org/10.1007/978-981-16-7397-9_35
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