ES2275636T3

ES2275636T3 - CONNECTION DEVICE OF A METAL TUBE AND A BEAM OR CONCRETE Slab.

Info

Publication number: ES2275636T3
Application number: ES01401453T
Authority: ES
Inventors: Jean-Pierre Viallon
Original assignee: Bouygues Travaux Publics SAS; VSL France
Current assignee: Bouygues Travaux Publics SAS; VSL France
Priority date: 2000-06-06
Filing date: 2001-06-06
Publication date: 2007-06-16
Anticipated expiration: 2021-06-06
Also published as: FR2809757A1; FR2809757B1; EP1162314B1; DE60124816T2; JP4706129B2; EP1162314A1; DE60124816D1; JP2002054242A

Abstract

Dispositivo de conexión de un tubo metálico recto (1) y de una viga o losa de hormigón (P), para una estructura mixta acero-hormigón que comprende el tubo metálico dispuesto diagonalmente entre dos losas o vigas de hormigón y conectado por cada extremo a las vigas o las losas de hormigón por un dispositivo de conexión que comprende una platina metálica (2) soldada en el extremo del tubo perpendicularmente al eje (4) del tubo, estando dicha platina (2) apoyada sobre la viga o la losa (P) y presentando una pluralidad de orificios (3) con los cuales cooperan unos medios de fijación por atornillado de la platina a unas barras (6) embebidas en el hormigón de la viga o de la losa, estando los orificios (3) practicados en la platina alrededor del tubo (1) y siendo los medios de fijación (7, 9, 10) que cooperan con estos orificios para fijar la platina a las barras, desmontables, caracterizado porque la conexión entre el tubo y las vigas o losas es completada por unos cables desmontables (16) que pasan por el interior del tubo (1), que atraviesan las platinas (2) y las vigas o losas (P) y que son tensados como unos cables de pretensadoDevice for connecting a straight metal pipe (1) and a concrete beam or slab (P), for a mixed steel-concrete structure comprising the metal pipe arranged diagonally between two concrete slabs and beams and connected at each end to the concrete beams or slabs by a connection device comprising a metal plate (2) welded at the end of the tube perpendicular to the axis (4) of the tube, said plate (2) resting on the beam or the slab (P ) and presenting a plurality of holes (3) with which fixing means cooperate by screwing the plate to bars (6) embedded in the concrete of the beam or slab, the holes (3) being made in the stage around the tube (1) and the fixing means (7, 9, 10) cooperating with these holes to fix the stage to the bars, removable, characterized in that the connection between the tube and the beams or slabs is completed by some desmo cables ntables (16) that pass through the inside of the tube (1), that cross the plates (2) and the beams or slabs (P) and that are tensioned as prestressing cables

Description

Dispositivo de conexión de un tubo metálico y de una viga o losa de hormigón.Connection device of a metal tube and a concrete beam or slab.

La presente invención se refiere a las estructuras mixtas acero-hormigón que comprenden un enrejado de tubos metálicos dispuestos diagonalmente entre dos losas o vigas de hormigón, en particular para la realización de un tablero de puente, la cubierta de un edificio o de un área, de un pontón o de una plataforma.The present invention relates to mixed steel-concrete structures comprising a lattice of metal pipes arranged diagonally between two concrete slabs or beams, in particular for the realization of a bridge board, the deck of a building or an area, of a pontoon or platform.

La invención tiene más precisamente por objeto las conexiones del enrejado con las vigas o losas de hormigón.The invention is more precisely intended lattice connections with concrete beams or slabs.

Se ha descrito en la publicación FR 2 723 424 un dispositivo de conexión que comprende en cada extremo de un tubo del enrejado una platina metálica soldada en el extremo del tubo perpendicularmente al eje del tubo, estando dicha platina apoyada sobre la viga o la losa y presentando una pluralidad de orificios con los cuales cooperan unos medios de fijación por atornillado de la platina a unas barras embebidas en el hormigón de la viga o de la losa.It has been described in publication FR 2 723 424 a connection device comprising at each end of a tube from the trellis a metal plate welded at the end of the tube perpendicular to the axis of the tube, said stage being supported on the beam or slab and presenting a plurality of holes with which cooperate fixing means by screwing of the stage to bars embedded in the concrete of the beam or of the slab.

El documento US-A-5505 033 describe un dispositivo de conexión de un tubo metálico recto dispuesto entre dos losas o vigas de hormigón y conectado por cada extremo a las vigas o a las losas por un dispositivo de conexión que comprende una platina metálica soldada en el extremo del tubo perpendicularmente al eje del tubo, estando dicha platina apoyada sobre la viga o la losa y presentando una pluralidad de orificios con los cuales cooperan unos medios de fijación por atornillado de la platina a unas barras embebidas en el hormigón de la viga o de la losa, estando los orificios practicados en la platina alrededor del tubo y siendo los medios de fijación, que cooperan con estos orificios para fijar la platina a las barras, desmontables.The document US-A-5505 033 describes a connecting device of a straight metal tube arranged between two concrete slabs and beams and connected at each end to the beams or slabs by a connection device comprising a metal plate welded at the end of the tube perpendicular to the axis of the tube, said stage being supported on the beam or slab and presenting a plurality of holes with which cooperate fixing means by screwing of the stage to bars embedded in the concrete of the beam or the slab, with the holes made in the plate around of the tube and being the fixing means, which cooperate with these holes to fix the stage to the bars, removable.

Un objeto de la presente invención es proporcionar unas realizaciones de dicho dispositivo, ventajosas en cuanto a su facilidad de mantenimiento y particularmente rentables.An object of the present invention is provide embodiments of said device, advantageous in regarding its ease of maintenance and particularly profitable

Según la invención definida por la reivindicación 1, el dispositivo es completado por unos cables desmontables que pasan por el interior del tubo, que atraviesan las platinas situadas en los dos extremos del tubo así como las vigas o las losas y que son puestos en tensión como unos cables de pretensado. Estos cables aumentan de forma considerable la resistencia del sistema con respecto a los esfuerzos de tracción sin tener que aumentar sensiblemente las dimensiones del dispositivo.According to the invention defined by the claim 1, the device is completed by cables removable that pass through the inside of the tube, which cross the plates located at the two ends of the tube as well as the beams or the slabs and that are put in tension like some cables of prestressed. These cables considerably increase the system resistance with respect to tensile stresses without have to significantly increase the dimensions of device.

Se describirán a continuación unos ejemplos no limitativos de la realización de la invención, con referencia a las figuras de plano anexo, en el cual:Some examples will not be described below. limiting the embodiment of the invention, with reference to the Annex plan figures, in which:

- la figura 1 es una sección de un tubo metálico comprimido fijado entre dos vigas de hormigón por medio de dispositivos de conexión conocidos, siendo el plano de sección el plano I - I de la figura 2;- Figure 1 is a section of a metal tube tablet fixed between two concrete beams by means of known connection devices, the section plane being the plane I-I of Figure 2;

- la figura 2 es una vista en planta de una platina del dispositivo de conexión de la realización de la figura 1;- Figure 2 is a plan view of a stage of the connection device of the embodiment of the figure one;

- la figura 3 es una vista de detalle a mayor escala de una de las fijaciones de la platina a la viga;- Figure 3 is an enlarged detail view scale of one of the fixations of the platen to the beam;

- la figura 4 es una sección análoga a la de la figura 1 pero en el caso de un tubo tendido y pretensado;- Figure 4 is a section analogous to that of the Figure 1 but in the case of a stretched and prestressed tube;

- la figura 5 es una vista en planta de una platina del dispositivo de conexión según la realización de la figura 4;- Figure 5 is a plan view of a deck of the connecting device according to the realization of the figure 4;

- la figura 6 es una vista de un tubo tendido, equipado según la invención con cables de pretensado, en situación entre dos vigas;- Figure 6 is a view of a laid tube, equipped according to the invention with prestressing cables, in situation between two beams;

- la figura 7 es un esquema del extremo de una vaina, y- Figure 7 is a diagram of the end of a sheath, and

- la figura 8 es un esquema de los extremos altos de los cables de pretensado de un dispositivo de conexión según las figuras 6 y 7.- Figure 8 is a diagram of the ends high of the prestressing cables of a connection device according to figures 6 and 7.

La figura 1 muestra un tubo metálico recto cilíndrico (1) al cual está soldada periféricamente (soldaduras), en cada extremo, una platina metálica (2) que tiene en planta la forma poligonal representada en la figura 2 y que presenta unos orificios (3), por ejemplo cuatro orificios, situados en el exterior del tubo y regularmente repartidos alrededor del eje (4) del
tubo.Figure 1 shows a cylindrical straight metal tube (1) to which is welded peripherally (welds), at each end, a metal plate (2) that has in plan the polygonal shape represented in Figure 2 and that has holes (3 ), for example four holes, located on the outside of the tube and regularly distributed around the axis (4) of the
tube.

El tubo con sus dos platinas está apoyado sobre dos caras paralelas (5) de dos vigas (P) de hormigón visibles parcialmente en la figura 1: el tubo es perpendicular a estas caras (4) pero en realidad es oblicuo con respecto a los planos de las vigas, como se ha ilustrado por ejemplo en la figura 6. Eventualmente, una junta está interpuesta entre la platina y la superficie de hormigón.The tube with its two plates is resting on two parallel faces (5) of two visible concrete beams (P) partially in figure 1: the tube is perpendicular to these faces (4) but in reality it is oblique with respect to the planes of the beams, as illustrated for example in figure 6. Eventually, a board is interposed between the stage and the concrete surface.

El dispositivo de conexión de un tubo a una viga está constituido, en cada extremo del tubo, por una pluralidad de barras (6) que han sido embebidas en el hormigón de la viga cuando tiene lugar el colado de ésta y a las cuales han sido fijados por un medio cualquiera apropiado, unos rácores (7) que son accesibles en unos alojamientos (8) formados en el hormigón. Estos rácores presentan un mandrilado fileteado en el cual se rosca un vástago (9) que atraviesa un orificio (3) de la platina y una tuerca (10) es roscada sobre el vástago hasta quedar a presión sobre la platina, eventualmente con interposición de una arandela (11). Preferentemente, un sombrerete (12) a movible es colocado para proteger el bulón.The device for connecting a tube to a beam it is constituted, at each end of the tube, by a plurality of bars (6) that have been embedded in the beam concrete when the casting of this takes place and to which they have been fixed by any appropriate means, fittings (7) that are accessible in housings (8) formed in the concrete. These fittings they have a threaded mandrel in which a stem is threaded (9) that crosses a hole (3) of the stage and a nut (10) is threaded on the rod until it is pressed on the stage, possibly with interposition of a washer (11). Preferably, a movable cap (12) is positioned to Protect the bolt.

Según la invención, la conexión entre un tubo y una viga o losa es completada por unos cables desmontables que pasan por el interior del tubo, que atraviesan las platinas y las vigas y que son tensados de manera en sí conocida como unos cables de pretensado.According to the invention, the connection between a tube and a beam or slab is completed by detachable cables that they pass through the inside of the tube, which go through the plates and the beams and that are tensioned in a manner known as cables Prestressing

En el caso ilustrado en las figuras 4 a 7, las platinas (2), además de los orificios (3) previstos alrededor de la zona de apoyo del tubo para la fijación de las platinas a las barras embebidas en el hormigón, presentan en el interior del tubo unos orificios (3') para el paso de los cables, por ejemplo dos orificios diametralmente opuestos (figura 5).In the case illustrated in Figures 4 to 7, the plates (2), in addition to the holes (3) provided around the tube support area for fixing the plates to the bars embedded in the concrete, they have inside the tube some holes (3 ') for the passage of the cables, for example two holes diametrically opposed (figure 5).

Preferentemente, los orificios (3) situados en el exterior del tubo para la fijación del tubo a las barras (6) ancladas en el hormigón están regularmente repartidos alrededor del tubo o bien individualmente (figura 2), o bien por pares (figura 5) y los orificios (3') situados en el interior del tubo para el paso de los cables de pretensado están regularmente repartidos entre los orificios (3) o entre los pares de orificios (3) (figura 5).Preferably, the holes (3) located in the outside of the tube for fixing the tube to the bars (6) anchored in the concrete are regularly distributed around the tube either individually (figure 2), or in pairs (figure 5) and the holes (3 ') located inside the tube for passage of the prestressing cables are regularly distributed among the holes (3) or between the pairs of holes (3) (figure 5).

Cada cable de pretensado, pasa por una vaina (13) que comprende una porción de vaina (13a) colocada en el interior del tubo y unas porciones de vaina (13b) colocadas en las vigas y encajadas por sus extremos en unas piezas metálicas huecas (14) tomadas en el hormigón de las vigas. Los cables a su vez atraviesan estas piezas y son retenidos de forma desmontable por unos medios clásicos, por ejemplo unas mordazas (15) accesibles desde el exterior de las
vigas.Each prestressing cable passes through a sheath (13) comprising a portion of sheath (13a) placed inside the tube and portions of sheath (13b) placed on the beams and embedded at its ends in hollow metal parts ( 14) taken in the concrete of the beams. The cables in turn pass through these pieces and are detachably retained by classic means, for example jaws (15) accessible from the outside of the
beams

Se ha representado a mayor escala en la figura 7, el extremo de una porción de vaina (13b) encajada en una pieza metálica hueca (14) y se ven en esta figura las ramas de un cable (16) que salen de la pieza y están retenidas en una mordaza (15).It has been represented on a larger scale in the figure 7, the end of a portion of sheath (13b) embedded in a piece hollow metal (14) and the branches of a cable are seen in this figure (16) that leave the piece and are held in a jaw (fifteen).

Estas ramas han sido previamente tensadas por medio de gatos, como los gatos (17) representados en la figura 8, de forma conocida.These branches have been previously tensioned by means of cats, such as cats (17) represented in figure 8, of known way.

Las barras y sus conexiones desmontables aseguran la resistencia en los estados límites últimos y los cables también desmontables aseguran la no descompresión bajo solicitación de fatiga.The bars and their removable connections ensure resistance in the ultimate limit states and cables also removable ensure no decompression on request of fatigue

Para la aplicación de un dispositivo según la invención, equipado con cables de pretensado, se realizan las operaciones siguientes:For the application of a device according to the invention, equipped with prestressing cables, the following operations:

--: colocación de las vainas (13a) en el tubo (1),placement of the pods (13a) in the tube (1),

--: soldadura al tubo de las platinas (2) provistas de sus perforaciones (3,3') de manera que las perforaciones (3') estén en la vertical de las vainas,tube welding of the plates (2) provided with its perforations (3.3 ') so that the perforations (3 ') are in the vertical of the pods,

--: colocación en los encofrados de las vigas o de las losas, de las vainas (13b), de las piezas metálicas (14) y de las barras (6) con sus rácores (7), en los puntos apropiados, y colado del hormigón,placement in the formwork of the beams or slabs, sheaths (13b), metal parts (14) and of the bars (6) with their fittings (7), in the points appropriate, and concrete casting,

--: colocación y atornillado de los vástagos (8) sobre los rácores (7) y atornillado de las tuercas sobre los vástagos,placement and screwing of the stems (8) on the fittings (7) and screw the nuts on the stems,

--: enfilado de los cables en las vainas (13a, 13b),cable routing in the sheaths (13a, 13b),

--: puesta a tracción de estos cables y extracción de los gatos.put to tension of these cables and extraction of the cats.

La invención no está limitada a las realizaciones que han sido descritas.The invention is not limited to embodiments that have been described.

Claims

1. Device for connecting a straight metal pipe (1) and a concrete beam or slab (P), for a mixed steel-concrete structure comprising the metal pipe arranged diagonally between two concrete slabs and beams and connected by each end to the beams or concrete slabs by a connection device comprising a metal plate (2) welded at the end of the tube perpendicular to the axis (4) of the tube, said plate (2) resting on the beam or the slab (P) and presenting a plurality of holes (3) with which fixing means cooperate by screwing the plate to bars (6) embedded in the concrete of the beam or slab, the holes (3) being made in the stage around the tube (1) and the fixing means (7, 9, 10) being cooperating with these holes to fix the stage to the bars, removable, characterized in that the connection between the tube and the beams or slabs is completed by some cables detachable (16) that pass through the inside of the tube (1), that pass through the plates (2) and the beams or slabs (P) and that are tensioned as prestressing cables.

2. Device according to claim 1, in the which these fixing means comprise threaded stems (9) that are detachably screwed to connectors (7) fixed at the ends of the bars (6) embedded in the concrete of the beam or of the slab, through these stems the holes (3) of the stage and presenting in highlight on the stage some ends on which nuts (10) are threaded which are pressed on the stage (2).

3. Device according to claim 1, in the which device connecting a tube to a beam is constituted, for each end of the tube, by a plurality of bars (6) that have been embedded in the beam concrete when the casting of this takes place and to which some have been fixed fittings (7) that are accessible in housings (8) formed in the concrete, presenting these fittings a threaded boring in the which is screwed a rod (9) through a hole (3) of the platen, being a nut screwed on the rod until pressurize on the stage.

4. Device according to claim 1, in the which the plates (2), in addition to the holes (3) provided around the tube support area for fixing the plates to the bars embedded in the concrete, present in the inside the tube some holes (3 ') for the passage of the cables prestressed.

5. Device on claim 4, in the which holes (3) located outside the tube for fixing to the tube the bars (6) anchored in the concrete are regularly distributed around the tube (1) or individually, or in pairs and the holes (3 ') located in the inside of the tube for the passage of the prestressing cables are regularly distributed between the holes (3) or between the pairs of holes (3).

6. Device according to claim 1, in the which the prestressing cables (16) pass through portions of pods (13a) located in the tubes (1) and by portions of pods (13b) located on the beams or slabs (P) and are fitted at its ends in hollow metal parts (14) taken in the concrete of beams or slabs.

7. Structure comprising a lattice of metal pipes (1) arranged obliquely between two beams or concrete slabs (P), characterized in that the pipes are connected to the beams or slabs by devices according to one of claims 1 to 6.

8. Application of a structure according to claim 7 to the realization of a bridge board, of a deck, pontoon or platform.