Diseño y ejecución de un refuerzo para la deconstrucción parcial de una nave con cubierta prefabricada a base de arcos atirantados de 38 metros de luz libre

Abstract

This paper presents the design and the execution of a structural strengthening induced by the partial deconstruction of the naves that contain the East bus garage of the Metropolitan Transport of Barcelona. The structure of the roof of the naves consisted of tied precast concrete arches spanning 38 m. The initial state of the structural system of the building and its specific conditions are described to establish the criteria to be considered in the design and execution process of the strengthening. Then, the design and execution of the strengthening needed to guarantee the stability of the roof structure and the main aspects related to the construction process are described. This intervention had a temporary character because the whole building should be deconstructed after a year term. So that, a strengthening that took advantage of the actual capacity of the existing structure was designed. It consisted of adding steel members which, interacting with the existing structure, configured a new structural system against horizontal actions. It was not necessary to strengthen any existing members neither to build new foundation elements.