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Nicola Scattarreggia
University School for Advanced Studies (IUSS), 27100 Pavia, Italy

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Journal article
Published: 20 August 2021 in Sustainability
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The effect of corrosion-induced damage on the seismic response of reinforced concrete (RC) circular bridge piers has been extensively investigated in the last decade, both experimentally and numerically. Contrarily, only limited research is presently available on hollow-section members, largely employed worldwide and intrinsically more vulnerable to corrosion attacks. In this paper, fiber-based finite element (FB-FEM) models, typically the preferred choice by practitioners given their reduced computational expense, are validated against previous shake-table and quasi-static cyclic tests on hollow-section RC columns, and then used to investigate the influence of corrosion-induced damage. To this end, modeling strategies of varying complexity are used, including artificial reduction of steel rebar diameter, yield strength and ductility, as well as that of concrete compressive strength to simulate cover loss, and ensuing dissimilarities quantified. Pushover and incremental dynamic analyses are conducted to explore impacts on collapse behavior, extending experimental results while accounting for multiple corrosion rates. Produced outcomes indicate a minimal influence of cover loss; substantial reductions of base shear (up to 37%) and ultimate displacement capacity (up to 50%) were observed, instead, when introducing relevant levels of deterioration due to corrosion (i.e., 30% rebar mass loss). Its predicted impact is generally lower when considering more simplified assumptions, which may thus yield non-conservative predictions.

ACS Style

Nicola Scattarreggia; TianYue Qiao; Daniele Malomo. Earthquake Response Modeling of Corroded Reinforced Concrete Hollow-Section Piers via Simplified Fiber-Based FE Analysis. Sustainability 2021, 13, 9342 .

AMA Style

Nicola Scattarreggia, TianYue Qiao, Daniele Malomo. Earthquake Response Modeling of Corroded Reinforced Concrete Hollow-Section Piers via Simplified Fiber-Based FE Analysis. Sustainability. 2021; 13 (16):9342.

Chicago/Turabian Style

Nicola Scattarreggia; TianYue Qiao; Daniele Malomo. 2021. "Earthquake Response Modeling of Corroded Reinforced Concrete Hollow-Section Piers via Simplified Fiber-Based FE Analysis." Sustainability 13, no. 16: 9342.

Scientific paper
Published: 20 December 2018 in Structural Engineering International
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On 14 August 2018 at 11:35 AM, a relevant portion (about 243 m) of the viaduct over the Polcevera river in Genoa collapsed, killing 43 people. The bridge was designed in the early 1960s by Riccardo Morandi, a well-known Italian engineer, and opened to the public in 1967. The collapsed part of the bridge essentially comprised an individual self-standing structure spanning 171 m and two simply-supported connecting Gerber beam systems, each spanning 36 m from the self-standing structure to the adjacent portions of the bridge. This paper aims to reminisce the complete story of the bridge, from the Italian construction boom in the 1960s to some of the issues that soon arose thereafter: the strengthening intervention in the 1990s, the subsequent structural monitoring and, finally, the strengthening project never brought to fruition. Potential reasons for the collapse are discussed, together with some of the possible inadequacies of the bridge, its maintenance and loading history based on critical reflection, comparison with specific features of bridge construction practice today and results obtained using numerical models with different levels of refinement. Since the entire matter (specifically the debris) was considered classified by the investigating magistrate in the immediate aftermath of the bridge collapse, this work is based entirely on publicly available material.

ACS Style

Gian Michele Calvi; Matteo Moratti; Gerard J. O'reilly; Nicola Scattarreggia; Ricardo Monteiro; Daniele Malomo; Paolo Martino Calvi; Rui Pinho. Once upon a Time in Italy: The Tale of the Morandi Bridge. Structural Engineering International 2018, 29, 198 -217.

AMA Style

Gian Michele Calvi, Matteo Moratti, Gerard J. O'reilly, Nicola Scattarreggia, Ricardo Monteiro, Daniele Malomo, Paolo Martino Calvi, Rui Pinho. Once upon a Time in Italy: The Tale of the Morandi Bridge. Structural Engineering International. 2018; 29 (2):198-217.

Chicago/Turabian Style

Gian Michele Calvi; Matteo Moratti; Gerard J. O'reilly; Nicola Scattarreggia; Ricardo Monteiro; Daniele Malomo; Paolo Martino Calvi; Rui Pinho. 2018. "Once upon a Time in Italy: The Tale of the Morandi Bridge." Structural Engineering International 29, no. 2: 198-217.