摘要:
A connecting device for use between a first and a second element (10, 20) in a civil engineering construction, where it enables relative movement of the first and second structural elements (10, 20) in the event of slow motion, and at least partially prevents relative movement of the first and second structural elements (10, 20) in the event of rapid motion. The device comprises a cylinder (30) that is stationary relative to the first structural element (10) and defines two chambers (31, 32) containing a fluid material and interconnected via a channel (39). Said cylinder (30) comprises a fixed wall (33) separating said two chambers (31, 32), and each chamber is defined by a movable piston (37, 38) on the opposite side from said wall (33), both of the movable pistons (37, 38) being secured to said second structural element (20).
摘要:
A damping device for use between a first and a second element (10, 20) of a civil engineering construction, where it can at least partially damp relative movement of the first and second structural elements (10, 20) in the event of rapid motion. Said device comprises a cylinder (30) that is stationary relative to the first structural element (10) and defines two chambers (31, 32) containing a fluid material and separated by a wall (33), at least one movable piston (33; 37, 38) being slidable within said stationary cylinder (30). Said wall (33) comprises at least one channel (34) interconnecting the two chambers (31, 32). The device is characterised in that it comprises at least one two-way valve (40) which seals said channel (34) when at rest but opens it to enable high-pressure fluid flow between the chambers when the pressure in one of said chambers (31, 32) increases as a result of rapid movement of the second structural element (20) relative to said first structural element (10), said valve (40) being urged into the closed position by a resilient member (45).
摘要:
The invention concerns a cable comprising a bundle of substantially parallel stretched strands (3) contained in at least a plastic protective sheath section (1). The plastic material of the sheath section extends between the strands to form a coherent matrix for spacing the strands. The invention is particular useful as prestressed cable, bracing guy or carrying cables for suspension bridges.
摘要:
On applique, sur une face interne de la paroi (2) du réservoir (1), un revêtement composite (3) comprenant une résine polymérisable dans laquelle sont noyées d'une part des fibres de renforcement aptes à absorber une partie au moins des efforts hydrostatiques exercés par le liquide (4) sur le réservoir sans les transmettre à la paroi, et d'autre part des fibres d'épaississement conférant au revêtement composite une épaisseur suffisante pour assurer l'étanchéité du réservoir vis-à-vis du liquide. Les fibres d'épaississement ont un module d'élasticité sensiblement plus petit que celui des fibres de renforcement.
摘要:
On installe des torons individuellement gainés (24) dans un tube, on injecte un produit de remplissage dans le tube, autour des torons, et on laisse durcir le produit de remplissage. La gaine individuelle (25) de chaque toron présente des renflements (26) espacés suivant la direction longitudinale du câble. Les torons sont installés dans le tube de façon telle que les renflements de leurs gaines respectives soient décalés longitudinalement les uns par rapport aux autres, ce qui ménage des intervalles entre les torons pour faciliter le bon remplissage du tube.
摘要:
A device including a first member (20) surrounding and secured to a section of a cable (6), a second member (22) connected to an element (12) to which a portion of the cable (6) is attached, and arranged around said first member, a resilient or viscoelastic ring (24) engaging the first member (20) and the second member (22), and a flexible container housed in a ring-shaped compartment (30) between the two members and filled with a viscous substance.
摘要:
Un élément de gaine (35) est prévu pour s'étendre dans une portion (9) de l'ouvrage précontraint dans une partie haute d'un trajet sinueux suivi par le câble de précontrainte. Cet élément comporte un canal d'évent (41) parallèle à la cavité tubulaire (20) recevant les torons du câble et de section sensiblement plus petite que la cavité tubulaire. Ce canal d'évent est agencé de façon qu'après mise en place de l'élément de gaine (35) dans ladite portion de l'ouvrage, le canal d'évent soit positionné au-dessus de la cavité tubulaire et communique avec la cavité tubulaire dans une région de l'élément de gaine située à l'intérieur de ladite portion de l'ouvrage, et avec l'extérieur de la gaine dans une région de l'élément de gaine située à l'extérieur de ladite portion de l'ouvrage. Utilisation notamment dans le domaine de la précontrainte extérieure démontable.
摘要:
A damping device for use between a first and a second element (10, 20) of a civil engineering construction, where it can at least partially damp relative movement of the first and second structural elements (10, 20) in the event of rapid motion. Said device comprises a cylinder (30) that is stationary relative to the first structural element (10) and defines two chambers (31, 32) containing a fluid material and separated by a wall (33), at least one movable piston (33; 37, 38) being slidable within said stationary cylinder (30). Said wall (33) comprises at least one channel (34) interconnecting the two chambers (31, 32). The device is characterised in that it comprises at least one two-way valve (40) which seals said channel (34) when at rest but opens it to enable high-pressure fluid flow between the chambers when the pressure in one of said chambers (31, 32) increases as a result of rapid movement of the second structural element (20) relative to said first structural element (10), said valve (40) being urged into the closed position by a resilient member (45).