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Numerical modelling and fragility assessment of typical freestanding building contents

Petrone, C; Di Sarno, L; Magliulo, G; Cosenza, E; (2016) Numerical modelling and fragility assessment of typical freestanding building contents. Bulletin of Earthquake Engineering , 15 (4) pp. 1609-1633. 10.1007/s10518-016-0034-1. Green open access

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Abstract

The paper assesses the adequacy of existing numerical models in predicting the seismic response of freestanding nonstructural components that exhibit rocking-dominated behavior. Based on a previous experimental test program on hospital building contents carried out by the authors, the study focuses on two different modelling techniques: (a) finite element method (FEM) and (b) rigid block model. The ability to predict the response of two hospital cabinets tested in the laboratory is verified by comparing the numerical response with the experimental one. The applicability and limitations of each modelling technique are also discussed. The outcomes of the present study show that both the adopted modeling techniques can provide a reliable prediction of the occurrence of rocking mechanism in hospital cabinets. Rigid block model can also predict the occurrence of the overturning, whereas FEM model can provide a prediction of the acceleration distribution at different locations of the cabinets, e.g. at different shelf levels. The efficiency of different intensity measures in predicting the damage states in rigid block is estimated. Comprehensive incremental dynamic analyses on different rigid blocks highlight that dimensionless intensity measure (Formula presented.) is the most efficient intensity measure to predict rocking and overturning in small rigid blocks, whereas (Formula presented.) is the most effective for large rigid blocks. Such intensity measures also allow generalizing the results to different rigid blocks, through the definition of a fragility approach.

Type: Article
Title: Numerical modelling and fragility assessment of typical freestanding building contents
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s10518-016-0034-1
Publisher version: http://dx.doi.org/10.1007/s10518-016-0034-1
Language: English
Additional information: © The Author(s) 2016. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Keywords: Nonstructural components, Hospital building contents, Seismic performance, FEM model, Rigid block, Seismic fragility
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1527628
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