You can help expand this article with text translated from the corresponding article in Italian. (October 2018) Click [show] for important translation instructions.
View a machine-translated version of the Italian article.
Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia.
Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article.
You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Italian Wikipedia article at [[:it:Riccardo Morandi]]; see its history for attribution.
You may also add the template {{Translated|it|Riccardo Morandi}} to the talk page.
Morandi was born in Rome. After his graduation in 1927, Morandi gained experience in Calabria working with reinforced concrete in earthquake-damaged areas. On his return to Rome to open his own office, he continued with his technical exploration of reinforced and prestressed concrete structures and embarked on the design of a series of novel cinema structures and bridges. His numerous later works include his work on the Fiumicino Airport (Rome) in 1970.
Morandi's cable-stayed bridges are characterised by very few stays, often as few as two per span, and often with the spans constructed from prestressed concrete rather than the more-usual steel.[4]
Although these bridges are often impressive, they are less economic than bridges with multiple stays and have therefore been of little influence on other engineers.[5] Bridges by Morandi have proved to require extensive maintenance and repairs over the years to pass bridge safety inspections, and cables embedded in concrete are difficult to inspect.
On his General Rafael Urdaneta Bridge in Venezuela - where the cables of the stays are not covered with prestressed concrete (as instead intended from the initial project, and optimal for Morandi)[6] - several exposed cables snapped from rapid corrosion, and all the stay-cables were replaced just 18 years after construction.[7]
About Ponte Morandi in Genoa (Polcevera Viaduct), since the 1970s Morandi himself had signaled and requested attention to the incorrect structural response of his bridge in Genoa, with the related safety risks, mentioning an unexpectedly fast corrosion as a possible reason for the problems, and has called for corrective works.[8][9][10]
In 2016 Ponte Morandi had been described by Antonio Brencich as a "failure of engineering", with escalating maintenance costs to keep it safe.[11] Pier number 9 of the bridge collapsed on 14 August 2018, causing 43 fatalities. The other two stayed-piers remained standing, as did the other eight non-stayed piers. The cause of the collapse was still under investigation more than two years later.
Morandi's similar but smaller Wadi el Kuf Bridge, in Libya, was closed for 2 days in October 2017 for safety reasons. This was after inspections identified potential fractures in the bridge. After the alert, road transport engineers inspected the bridge concluding that it needed only emergency maintenance and was safe. It was open again for light traffic, while local security officials were stopping heavily-loaded trucks from crossing in groups.[12][13] A similar security alert followed in August 2018.[14]
Projects
Major works (bridges only) by Morandi is shown below:[15]
^www.detailsinsection.org/wp-content/uploads/2014/07/6Architettura-Ingegneria.pdf (in Italian and English) "LA CONCEZIONE STRUTTURALE Ingegneria e architettura in Italia negli anni cinquanta e sessanta" - 2008 "Riccardo Morandi and the V Pavillion for Torino Esposizioni" @ page 239
^Fernández Troyano, Leonardo (2003). Bridge Engineering: A Global Perspective. Thomas Telford Publishing.
^(in Italian) L'invenzione di Morandi "...i 6 cavalletti bilanciati sostengono le travi intermedie di "serraglia"; lo strallo è più sottile e sempre matericamente omogeneo, a conferma del suo ruolo chiave nella figura, compiuta e perfetta. Ma lo strallo omogeneizzato è destinato a lasciare il posto a un più ordinario fascio di cavi di acciaio, prodotto secondo il brevetto Felten & Guilleaume, come confermato nell'ultima relazione di calcolo firmata da Morandi, nel febbraio 1960, nonostante il plastico sulla copertina ne esalti ancora la matericità."https://www.ingenio-web.it/21020-linvenzione-di-morandi
^De Rincon, Oladis; et al. (October 2001). "Inspection and Repair of Lake Maracaibo Bridge Suspension Cables". Materials Performance. 40 (10): 34–38.
^(in Italian)Corriere della Sera, Venerdì 31 agosto 2018, Pagina 12 "La relazione sull'opera e quell'inquietudine dell'ingegner Morandi" – di Giuseppe Pullara. (The Engineer Remo Calzona [it], in 1976 student of Morandi, speaks of the problems he saw on the Genoa bridge in that year, when Morandi involved him in analysis about that.)
^Note: for some other '50-'60 works, not only bridges, check Italian language website atlante.iuav.it, set "Morandi Riccardo" on the "Ingegnere" menù, then press "Ricerca" button.
-panorama3.jpg)
-001.jpg)
.jpg)
.jpg)
