Computational elastoplastic Limit Analysis of the Paderno d’Adda bridge (Italy, 1889)

• Autorzy: Ferrari R. , Cocchetti G. , Rizzi E.

Identyfikatory

DOI

10.1016/j.acme.2017.05.002

• Języki publikacji: EN

Abstrakty

EN

The Paderno d’Adda bridge is a historical iron arch bridge built in 1889 for connecting the provinces of Lecco and Bergamo across the Adda river, in northern Italy. The bridge was designed through the so-called Theory of the Ellipse of Elasticity. Its use is two-fold: a railway track lays within the inner deck of its upper continuous beam; automotive traffic runs on top. Today, after 128 years of continuous duty, the viaduct keeps in service, with trains crossing at slow speed and alternated one-way road traffic with no heavy-weight vehicles. Starting from a computational formulation for the elastoplastic Limit Analysis of 3D truss-frame systems, apt to provide the exact limit load multiplier and attached collapse mechanism, the full evolutive piece-wise-linear response of the bridge is derived, for different try-out loading configurations. The structural analysis, wholly original in its computational implementation, aims at outlining a survey on the potential plastic collapse characteristics of the bridge. Results reveal possible structural deficiencies for the upper continuous beam, where main plasticizations appeared. Instead, elements of the piers plasticized only for tests with loading much un-symmetrically located to the crown of the arch and the slender doubly built-in parabolic arch rarely showed some plasticization. This evidences the arch as a robust characteristic beautiful feature of the bridge. Moreover, analyses pointed out that the effect of the normal forces on the elastoplastic response of the bridge shall not be considered as negligible, as instead it may be often considered in the Limit Analysis of frames.

Słowa kluczowe

EN

historical iron arch bridge; non-linear truss-frame FEM model; evolutive elastoplastic structural analysis; computational limit analysis; collapse load multiplier and mechanism

PL

most żelazny; analiza strukturalna; analiza graniczna

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2018
• Tom: Vol. 18, no. 1
• Strony: 291--310
• Opis fizyczny: Bibliogr. 23 poz., rys., tab., wykr.

Twórcy

autor

Ferrari R.

• Università degli Studi di Bergamo, Dipartimento di Ingegneria e Scienze Applicate (Dalmine), viale G. Marconi 5, I-24044 Dalmine (BG), Italy

autor

Cocchetti G.

• Università degli Studi di Bergamo, Dipartimento di Ingegneria e Scienze Applicate (Dalmine), viale G. Marconi 5, I-24044 Dalmine (BG), Italy
• Politecnico di Milano, Dipartimento di Ingegneria Civile e Ambientale, piazza L. da Vinci 32, I-20133 Milano, Italy

autor

Rizzi E.

• Università degli Studi di Bergamo, Dipartimento di Ingegneria e Scienze Applicate (Dalmine), viale G. Marconi 5, I-24044 Dalmine (BG), Italy

Bibliografia

• [1] Società Nazionale delle Officine di Savigliano, Viadotto di Paderno sull'Adda (Ferrovia Ponte S. Pietro-Seregno), Tip. e Lit. Camilla e Bertolero, Torino, 1889.
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• [3] R. Ferrari, E. Rizzi, On the theory of the ellipse of elasticity as a natural discretisation method in the design of Paderno d'Adda Bridge (Italy), in: 6th Int. Conf. on Structural Analysis of Historical Construction (SAHC08), Bath, UK, 2–4 July 2008, vol. 1, 2008, 583–591, ISBN: 978-0-415-46872-5.
• [4] R. Ferrari, M. Facheris, E. Rizzi, Structural analysis of the Paderno d'Adda Bridge (Italy, 1889), in: 7th Int. Conference on Structural Analysis of Historical Constructions (SAHC10), Shanghai, China, 6–8 October 2010, Advanced Materials Research, vols. 133–134, 2010, 459–465.
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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018)