Eugène Freyssinet (13 July 1879 – 8 June 1962) was a French structural and civil engineer. He was the major pioneer of prestressed concrete. Freyssinet was born in at Objat, Corrèze, France. He worked in the École Nationale des Ponts et Chaussées in Paris, France where he designed several bridges until the First World War intervened. His tutors included Charles Rabut. He served in the French Army from 1904-1907 and again from 1914-1918 as a road engineer.

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  • Eugène Freyssinet (13 July 1879 – 8 June 1962) was a French structural and civil engineer. He was the major pioneer of prestressed concrete. Freyssinet was born in at Objat, Corrèze, France. He worked in the École Nationale des Ponts et Chaussées in Paris, France where he designed several bridges until the First World War intervened. His tutors included Charles Rabut. He served in the French Army from 1904-1907 and again from 1914-1918 as a road engineer. His most significant early bridge was the three span Pont le Veurdre near Vichy, built in 1911. At the time, the 72.5 metre (238 ft) spans were the longest so far constructed. Freyssinet's proposal was for three reinforced concrete truss spans, and was significantly less expensive than the standard masonry arch design. The design used jacks to raise and connect the arches, effectively introducing an element of prestress. The bridge also enabled Freyssinet to discover the phenomenon of creep in concrete, whereby the concrete deforms with time when placed under stress. Regarding this bridge, Freyssinet wrote: "I have always loved it more than any other of my bridges, and of all that the War has destroyed, it is the only one whose ruin has caused me real grief". He served as the director of Public Works in Moulins starting in 1905. He also served as a road engineer in central France from 1907 till 1914. Working for Claude Limousin until 1929, he designed a number of structures including a 96.2 m (315 ft) arch bridge at Villeneuve-sur-Lot, and several large thin-shell concrete roofs, including aircraft hangars at Orly. He also built cargo ships from concrete. His 1919 design at St Pierre du Vauvray again increased the record for a concrete arch span, with 132 m (435 ft) hollow arches, completed in 1923. His largest structure was the Plougastel Bridge with three identical spans of 180 m (592 ft) each, completed in 1930. Here he studied creep in more detail, and developed his ideas of prestressing, taking out a patent in 1928. Although Freyssinet did much to develop prestressed concrete, he was not its inventor. Other engineers such as Doehring had patented methods for prestressing as early as 1888, and Freyssinet's mentor Rabut built prestressed concrete corbels. Freyssinet's key contribution was to recognise that only high-strength prestressing wire could counteract the effects of creep, and to develop anchorages and other technology which made the system flexible enough to be applied to many different types of structures. Having left Limousin, he set up his own firm to build prestressed concrete electricity pylons, but the business failed. In 1935, he used prestressing to consolidate the maritime station of Le Havre which was threatening to settle beyond repair. Freyssinet introduced prestressed concrete beams, and jacked up the shipyard buildings. Following this success, he joined the firm of Campenon-Bernard and went on to design several prestressed bridges. Many of Freyssinet's designs were new and elaborate for his time--some of them so much so that they were never built, such as the Phare du Monde, a 2,300 foot tower planned for the 1937 World Fair in Paris. According to Leonardo Troyano, "his capacity for creation, invention and research and his non-conformity with existing ideas and doctrines made him one of the most notable engineers in the history of engineering".
  • Eugène Freyssinet war französischer Ingenieur und Erfinder des Spannbetons. Er studierte an der École polytechnique in Paris. In den Jahren 1904-1907 und 1914-1918 arbeitete er für die französische Armee als Ingenieur; in den Jahren 1907-1914 war er für den zivilen Straßenbau tätig. Die Idee des Spannbetons hatte Freyssinet bereits am Anfang des 20. Jahrhunderts, im Jahre 1928 wurde das Verfahren patentiert. Die erste praktische Anwendung war ein Bauwerk im Hafen von Le Havre aus den Jahren 1933-1935. Zu den bedeutenden Bauwerken, die Freyssinet entwarf, gehören unter anderem eine Brücke über die Marne in Frankreich aus den Jahren 1947-1949, die Brücke zwischen Caracas und La Guaira in Venezuela aus den Jahren 1952-1953 und die Autobahnbrücke Nr. 10 am Flughafen Orly in Frankreich aus dem Jahre 1958. Nicht verwirklicht wurde der Phare du Monde für die Weltausstellung 1937 in Paris.
  • Eugène Freyssinet fue un ingeniero civil y estructural francés, pionero al que se considera el principal impulsor del pretensado en las estructuras de hormigón, y el ingeniero que llevó esta técnica a su utilización industrial masiva.
  • Eugène Freyssinet est un ingénieur français. Il est né à Objat en Corrèze. Il fait l'École polytechnique puis l'École nationale des ponts et chaussées. Nommé à Moulins, il construit de nombreux ponts jusqu'à la Première Guerre mondiale. Il obtient le prix Caméré de l'Académie des sciences pour la technique du décintrement par vérins, employée pour la première fois pour la construction du pont de Prairéal en 1908. Ses nombreuses recherches lui permettent de mettre au point des cintres roulants, des voûtes à nervures au-dessus et surtout, il découvre l'effet bénéfique des vibrations sur la mise en œuvre du béton. Il est considéré comme l'inventeur du béton précontraint, brevet déposé en 1928. Dans les années 1920, il participe à la construction du pont Albert-Louppe à trois travées identiques de 180 m de portée où il découvre les lois de la déformation différée des bétons. En 1933, il consolide la gare maritime du Havre qui se tassait sur elle-même et menaçait de s'effondrer. Il meurt en 1962 à 83 ans à Saint-Martin-Vésubie dans les Alpes-Maritimes. La société STUP (Société Pour l'Utilisation de la Précontrainte) est créée afin de mettre en œuvre les brevets d'Eugène Freyssinet. Cette société a changé de nom pour devenir Freyssinet-International (S.T.U.P. ) aujourd'hui groupe Freyssinet.
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  • Eugene Freyssinet
  • Eugène Freyssinet
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  • Eugène Freyssinet (13 July 1879 – 8 June 1962) was a French structural and civil engineer. He was the major pioneer of prestressed concrete. Freyssinet was born in at Objat, Corrèze, France. He worked in the École Nationale des Ponts et Chaussées in Paris, France where he designed several bridges until the First World War intervened. His tutors included Charles Rabut. He served in the French Army from 1904-1907 and again from 1914-1918 as a road engineer.
  • Eugène Freyssinet war französischer Ingenieur und Erfinder des Spannbetons. Er studierte an der École polytechnique in Paris. In den Jahren 1904-1907 und 1914-1918 arbeitete er für die französische Armee als Ingenieur; in den Jahren 1907-1914 war er für den zivilen Straßenbau tätig. Die Idee des Spannbetons hatte Freyssinet bereits am Anfang des 20. Jahrhunderts, im Jahre 1928 wurde das Verfahren patentiert.
  • Eugène Freyssinet fue un ingeniero civil y estructural francés, pionero al que se considera el principal impulsor del pretensado en las estructuras de hormigón, y el ingeniero que llevó esta técnica a su utilización industrial masiva.
  • Eugène Freyssinet est un ingénieur français. Il est né à Objat en Corrèze. Il fait l'École polytechnique puis l'École nationale des ponts et chaussées. Nommé à Moulins, il construit de nombreux ponts jusqu'à la Première Guerre mondiale. Il obtient le prix Caméré de l'Académie des sciences pour la technique du décintrement par vérins, employée pour la première fois pour la construction du pont de Prairéal en 1908.
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  • Eugène Freyssinet
  • Eugène Freyssinet
  • Eugène Freyssinet
  • Eugène Freyssinet
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