Retrofit in listed works of urban infrastructure: the case of the Viaduct over the Gallery of States

Abstract

The monumental architecture of Brasília, the federal capital of Brazil, was conceived by the plastic features of the architects Oscar Niemeyer and Lúcio Costa. Since its foundation, the city has attracted the international architectural panorama and was designated, in 1987, as a world cultural heritage by UNESCO. The Retrofit represents a practice that guarantees the preservation of a certain building, providing new functional rehabilitation. This work deals with the case of the collapse of the Viaduct over the Gallery of States, located on the South Highway - DF 002, one of the main road arteries of the Brasília pilot plan. After analyzing the pathologies and mechanisms that led to the partial structural collapse of the old pillar and prestressed board, the Retrofit project was evaluated through restructured pillars with thickening of the central core and global stiffening of the structure. In order to understand the most appropriate type of intervention to preserve heritage, aspects of performance and structural safety, useful life and architectural language were considered, without presentation of numerical models. The Retrofit adopted shows how the viaduct's patrimonial value was respected from the point of view of adding durability to the work of art and guaranteeing the safety of the users who transit it.