Abstract
The roof constructed recently near Olten, in Switzerland, consists of a series of cylindrical shell surfaces, with skylights between the successive shells. It covers an area of 13.500 m 2 , and the building is to be used as a storehouse and servicing installation for the Federation of Consumer Goods Society. The general nature of the design made it logical, from the outset, to construct the roof as a number of similar prefabricated units. This method had evident economic advantages. The repetition of similar cylindrical roof sections made it possible to reiterate also the particular constructive process which was adopted in this case. The prefabricated shell units have been reinforced with lateral ribs, which make them sufficiently stiff to be handled at the working site. Each unit is 25.20 m long and spans a width of 1.40 ms. The roof is made up of 18 such elements. A feature of this roof is that it has been subjected to a prestressing process, applied by cables, running along the extrados of the cylindrical surface of each unit. This improves the stability and strength of the shells, and induces favourable stresses which counteract noticeably the effects of the shear forces and bending moments. The edges of these shells have been reinforced by increasing the thickness of the ribs, thereby improving the end anchorage. In order to check the theoretical calculations for this structure, several tests were carried out on scale models.
Highlights
La cubierta recientemente construida en las cercanías de Olten (Suiza), de tipo laminar, especial, curvada, constituida por una serie de superficies cilindricas sucesivas y con lucernario en las soluciones de continuidad que cada par de superficies parciales cilindricas motiva, tiene por principal objeto cubrir una superficie de 13.500 m^ edificados con destino a los servicios y explotación de un almacén de la Federación de Sociedades de Consumo
Con objeto de comprobar los resultados obtenidos en el estudio analítico de esta estructura, se hicieron varios ensayos sobre modelo reducido
A feature of this roof is t h a t it has been subjected to a prestressing process, applied by cables, running along t h e extrados of the cylindrical surface of each unit
Summary
Una particularidad de esta cubierta consiste en aplicarle un pretensado constituido por cables, de trazado curvo, apoyados sobre el trasdós de cada superficie cilindrica que constituye un tramo. Los bordes de estas láminas se h a n reforzado aumentando el espesor de los nervios, con lo que se ha conseguido mejorar las condiciones de anclaje. La luz prevista por los arquitectos proyectistas era del orden de 25 m para el elemento-tipo "shed" y, por ello, la superficie total cubierta había de subdividirse en 64 elementos idénticos entre sí. En planta, de la superficie cubierta y la constante repetición de un mismo elemento, así como la premura del plazo para su construcción, impusieron, desde un principio, el empleo de elementos p r e fabricados. © Consejo Superior de Investigaciones Científicas Licencia Creative Commons 3.0 España (by-nc) http://informesdelaconstruccion.revistas.csic.es sección de un elemento
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