The ideal Renaissance city stands like a fortress city, where the streets and squares are designed to facilitate the movement of troops among all points in of the city. The concepts of symmetry and robustness are fundamental in the definition of urban space. This space creates hierarchies and does not always guarantee a correct management of the flows inside, especially when the city expands. Through the graph theory and the concept of Spectral Gap we can define more rigorously the concept of fluidity of the urban network, providing criteria such that the expansion of the city outside the city walls not only destroys the ideal system of urban flow, but strengthens the system itself ensuring robustness to the network. We will study the case of a city-fortress, Palmanova (Udine), then the case of a city that has undergone expansion, Grammichele (Catania), and then define the concepts of a structure that guarantees the highest possible value for the fluidity of the network, through the general concept of graph theory and related to the particular graph expanders. Finally will imagine the shape of an ideal city which may contain within it the characteristics of speech of the Renaissance cities, combined with the contemporary instances of a city in the necessary movement.

Shaping Ideal Cities: From Palmanova and Grammichele towards a Flow-based Model of Urban Utopia / Spada, Marco; D'Autilia, Roberto. - STAMPA. - 1:(2013), pp. 34-34. (Intervento presentato al convegno Spaces and Flows: Fourth International Conference in Urban and ExtraUrban Studies tenutosi a Amsterdam (NL) nel 22 - 23 november 2013).

Shaping Ideal Cities: From Palmanova and Grammichele towards a Flow-based Model of Urban Utopia

SPADA, MARCO;D'AUTILIA, Roberto
2013

Abstract

The ideal Renaissance city stands like a fortress city, where the streets and squares are designed to facilitate the movement of troops among all points in of the city. The concepts of symmetry and robustness are fundamental in the definition of urban space. This space creates hierarchies and does not always guarantee a correct management of the flows inside, especially when the city expands. Through the graph theory and the concept of Spectral Gap we can define more rigorously the concept of fluidity of the urban network, providing criteria such that the expansion of the city outside the city walls not only destroys the ideal system of urban flow, but strengthens the system itself ensuring robustness to the network. We will study the case of a city-fortress, Palmanova (Udine), then the case of a city that has undergone expansion, Grammichele (Catania), and then define the concepts of a structure that guarantees the highest possible value for the fluidity of the network, through the general concept of graph theory and related to the particular graph expanders. Finally will imagine the shape of an ideal city which may contain within it the characteristics of speech of the Renaissance cities, combined with the contemporary instances of a city in the necessary movement.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/541968
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