Resumen de Biblioteca Sudamericana
Hugo Corres Peiretti, Eduardo Romero Rey, Ignacio Fernández Ortega, Fernando Bravo Notario, P Martin
An amount of five buildings constitute the resort for the new Arabian-South American Library. The main building and the highest is the Library itself, which is connected from its first floor through a marquee with the Restaurant and the Theatre.
The Arabian-South American Library building is a ten floor building, without considering the roof and two underground floors, which plan’s shape is round with a 90m radius and around 80m length combined with two straight sections in their ends of 50m each. The building is 20m width, from which 4m in each side are built as cantilevers.
The floor in the typical plan is unidirectional with a 20m span between columns. To span this, three prestressed concrete beams, with a rectangular section of 1.5mx1.2m and a 6m distance between axles, have been placed. The two lateral beams are in alignment with the columns, and the central beam is supported over other reinforced concrete beam of 0.5mx1.5m and 12m span.
Above the longitudinal beams will be executed a reinforced concrete solid slab with a 0.25m edge.
The vertical structure is solved through pillars and cores made of reinforced concrete.
The three cores are located in the convex side of the round sector and their function is to resist the actions.
As a designing standard it has been considered that the cores are able to resist the entire seismic action.
Another special building from this resort is the restaurant, which includes two structural slabs and a big spherical roof that covers the entire area with an 18m maximum height and a 50m maximum diameter in the “place level”.
The “place level” has two structural functions. On the one hand, it’s the slab that must support the vertical loads from the ground floor, and on the other hand, it’s the inferior tie rod of the spherical cover. It’s made of a concrete reinforced slab, because of the irregular geometry of the pillars distribution, with spans around 8m in both directions.
The first floor has two big lateral openings. The irregular geometry of the slab and the pillars, and its big span (23m), which must span from the entrance through the marquee to the support in the curved wall, suggests the using of a prestressed concrete slab type.
