Seismic fragility functions for Portuguese RC precast buildings
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Seismic fragility functions for Portuguese RC precast buildings R. Sousa1 · N. Batalha2 · V. Silva3,4 · H. Rodrigues4 Received: 1 July 2020 / Accepted: 9 November 2020 © Springer Nature B.V. 2020
Abstract Fragility functions are fundamental for the assessment of seismic safety of structures or the loss assessment of a portfolio of assets. The present paper describes a procedure to derive fragility functions representative of Portuguese reinforced concrete precast buildings. This goal was achieved following an analytical methodology considering the result of hundreds of nonlinear static analyses, whose building models reflect both mechanical and geometrical characteristics of the Portuguese industrial building stock. Considering the specificities of this typology, and in particular the connections between the structural members, a recently developed macro-element was employed, which enables the explicit simulation of friction and dowel mechanisms. The fragility analyses considered both structural and nonstructural limit states, and the findings indicate a poor seismic performance, even under low seismic demand. Keywords Reinforced concrete · Precast buildings · Non-linear static analyses · Seismic fragility · Risk assessment
1 Introduction The poor seismic performance of reinforced concrete (RC) precast buildings in past earthquakes has been largely documented in the literature (Belleri et al. 2014; Sezen and Whittaker 2006; Liberatore et al. 2013; Magliulo et al. 2014; Bournas et al. 2014; Romão et al. 2013; Babič and Dolšek 2016; Batalha et al. 2019; Dal Lago et al. 2019). These past studies indicate that the structural damage typically occurs at the bottom of the columns with the development of plastic hinges, as well as failures at the * H. Rodrigues [email protected] 1
CDRSP, Polytechnic of Leiria, Leiria, Portugal
2
CONSTRUCT‑LESE, Faculty of Engineering (FEUP), University of Porto, Porto, Portugal
3
Faculty of Science and Technology, University Fernando Pessoa, Porto, Portugal
4
RISCO, Civil Engineering Department, University of Aveiro, Aveiro, Portugal
13
Vol.:(0123456789)
Bulletin of Earthquake Engineering
beam-to-column connections due to deficient seismic detailing, namely the absence of steel dowels (Belleri et al. 2015; Magliulo et al. 2014). In addition to the different structural components, important losses result also from damage in non-structural elements, contents, and business interruption. Rodrigues et al. (2018) demonstrated that business interruption, a component that is rarely considered in risk assessment studies, has a significant impact on economic losses, with repercussions that can go beyond the local or regional level. Damage in industrial buildings is responsible for large social and economic consequences. As noted by Liberatore et al. (Liberatore et al. 2013) and Magliulo et al. (2014), after the 2012 M6.2 (20 May) and the 5.8 (29 May) Emilia-Romagna earthquakes, hundreds of factories suffered severe damage and up to 7000 people lost their jobs due to the direct and
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