EP2431525B1 - Poutre composite acier-béton pour construction de pont - Google Patents

Poutre composite acier-béton pour construction de pont Download PDF

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Publication number
EP2431525B1
EP2431525B1 EP11007512.4A EP11007512A EP2431525B1 EP 2431525 B1 EP2431525 B1 EP 2431525B1 EP 11007512 A EP11007512 A EP 11007512A EP 2431525 B1 EP2431525 B1 EP 2431525B1
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EP
European Patent Office
Prior art keywords
steel
reinforced concrete
steel profile
precast concrete
concrete
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11007512.4A
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German (de)
English (en)
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EP2431525A1 (fr
Inventor
Victor Schmitt
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SSF INGENIEURE AG
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SSF Ingenieure AG
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Priority to PL11007512T priority Critical patent/PL2431525T3/pl
Publication of EP2431525A1 publication Critical patent/EP2431525A1/fr
Application granted granted Critical
Publication of EP2431525B1 publication Critical patent/EP2431525B1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
    • E04C3/294—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete of concrete combined with a girder-like structure extending laterally outside the element
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete
    • E01D2101/26—Concrete reinforced
    • E01D2101/268—Composite concrete-metal

Definitions

  • the invention relates to a reinforced concrete composite beam for a bridge construction, in particular for an auxiliary bridge for road overpasses, with a U-shaped steel profile with two webs and a steel bottom flange on its underside and a limp reinforced concrete precast at its top.
  • the U-shaped steel profile binds with anchors at free ends of its webs by a embedment depth in the precast concrete part.
  • a shear-resistant bond between the precast concrete part as the upper flange of the composite steel support on the one hand and the U-shaped steel profile is produced as a bottom flange.
  • the invention also relates to a bridge structure for traffic routes, in particular an auxiliary bridge for overpasses, with a plurality of reinforced concrete composite beams, which are arranged running side by side in the bridge longitudinal direction.
  • the EP 2 096 222 A2 shows a method for producing bar-shaped steel-concrete composite beams from a steel beam and a reinforced concrete beam as a top flange, comprising the following steps: dividing a double-T beam into two stainless steel beams by a separating cut, forming steel anchors on a web-shaped portion of the Steel girder by a cut with sections with undercuts, the separating cut on the steel girder steel dowel forms, facing away from the carrier and a dowel base on the carrier opposite dowel sides merge unilaterally in a dowel end face, mounting of reinforcing steel for the concrete beam with involvement of the steel girder, concrete reinforcement of the reinforced concrete beam to the steel beam, wherein fillets are formed at the transitions between the dowel end faces and the dowel base.
  • the invention also relates to a steel beam for a beam-shaped steel-concrete composite beam according to this method and to a finished composite beam.
  • the DE 199 03 310 A1 discloses a composite beam as a steel beam with factory or in situ aufbeton Arthurm flange and is characterized in that is designed for bridge structures as deck bridges of the concrete flange of composite prefabricated part as a full-surface formwork element and forms (with an adjacent composite prefabricated part) the circuit for in-situ concrete slab.
  • the US 2006/265819 A1 shows a support system with a modified reverse box girder design for improved performance and ease of manufacture.
  • Each carrier of a series of carriers is formed with an upper flange portion, a pair of portions extending downwardly from opposite sides of the upper flange portion, and a base portion below the web portions.
  • the base portion has flanged foot portions generally facing each other.
  • a plate-shaped deck is coupled to the series of supports to form the support system.
  • each support profile comprises a recessed in the concrete connecting part, which is formed integrally with the profile and having means to the are intended to cooperate with the reinforcing elements, which are mounted transversely to the profiles and sunk together with the preventing profiles in the concrete.
  • the connecting part has a constant area and extends in a straight line on the support profile and its means, which are intended to cooperate with the reinforcing elements, which consist of cutouts and the triangulation of the profile between the belt of the profile and the concrete slab and a transfer of the vertical Ensure loads.
  • the carrier profile is in the form of a T-shaped profile
  • the connecting part forming web is provided with evenly spaced, substantially dovetailed cutouts and the profile and its connecting part is obtained either by cutting in the web of a T-profile or by symmetrical neckline of a I-shaped or H-shaped profile with a high bridge or a restored, welded profile, consisting of a strap and a bridge.
  • the outer, preferably rounded, the dovetail-shaped cutouts delimiting corner regions are each provided with at least one recess for attaching a flat reinforcing element or one or more connected Arm istsdorfisen.
  • the object of the invention is therefore to provide an economical bridge construction for auxiliary bridges.
  • This object is achieved in a bridge structure of the type mentioned by a regular rectangular cross-section of the precast concrete and by a largely concrete-free steel profile, namely, outside the embedment depth in the precast concrete part no contact with the concrete of the precast concrete more.
  • the embedment depth represents the measure to which the webs of the steel profile embed or immerse in the precast concrete part. It defines a contact surface between the precast concrete element and the steel profile.
  • the invention pursues the principle of composing the reinforced concrete composite support from the simplest possible basic components made of concrete on the one hand and steel on the other hand.
  • the precast concrete part has an extremely simple outer contour, which can be done for a factory production in high quantities and because of the simple and regular spatial form with very little effort.
  • the steel profile can also have a perfectly regular and simple cross-section.
  • reinforced concrete composite carrier requires only little effort.
  • the steel profile can be crushed from an upper side of the still fresh concrete of the precast concrete part to form together with the precast concrete part the reinforced concrete composite support. Since the steel profile is substantially free of concrete and unfilled and only pressed or shaken, the production of reinforced concrete composite carrier from its concrete and its steel component is no particular challenge.
  • the free ends of the webs of the U-shaped steel profile can be cut and alternately notched on different sides.
  • the welding of steel dowels to the steel profile as elements that integrate into the precast concrete slab is also known.
  • the free ends of the webs composite anchors which embed in the precast concrete part and are formed by cutting the webs of the steel profile.
  • composite dowels can be formed, which lead to a reliable and resilient gearing between the U-shaped steel profile and the precast concrete part.
  • an extremely economical production of the composite dowels can be achieved by a sectional direction symmetrical with respect to the cutting direction, in that the same section produces the composite dowels for two steel profiles. This makes it possible to achieve a low-defect formation of the composite dowels on the steel profile. It contributes to an extremely economical production of reinforced concrete composite beams.
  • the length of the steel dowels largely determines the embedment depth of the webs in the precast concrete part. They are usually slightly shorter than the embedment depth.
  • the steel profile may be made of a folded sheet metal.
  • the sheet may have a thickness of up to about 10 mm. These dimensions are sufficient for auxiliary bridges with short spans and low construction heights.
  • the steel profile may be made of welded sheets.
  • the webs can be welded as a vertical leg of the U-shaped steel profile on the steel lower flange as the sole of the U-shaped profile, for example by Halskehlnähte.
  • the composition of the U-shaped steel profile of webs on the one hand and a steel lower belt on the other hand also allows a material gradation in terms of their dimensioning between the steel lower flange and the web plates. As a result, the steel profile can be adapted to concrete loads and its material can be used economically.
  • the composite steel beams are regularly at the front end on the steel profile.
  • the U-shaped steel profile can therefore be filled with in-situ concrete, at least in the area of the load introduction surfaces.
  • the steel profile has at its front ends of the steel composite carrier load introduction stiffeners, which are arranged standing upright in a direction transverse to the longitudinal extension of the steel composite support and in the U-shaped steel profile. They prevent buckling of the U-shaped steel profile at its bearing surfaces under load.
  • reinforced concrete composite beams can be adjacent to each other to form an auxiliary bridge in the bridge longitudinal direction.
  • a compound of reinforced concrete composite support with each other is possible for example by applying a continuous in-situ concrete slab.
  • connection reinforcement that form loops and overlap in the assembled state with loops of an adjacent steel composite beam or with a separate reinforcement loop.
  • the overlapping reinforcing loops of adjacent reinforced concrete composite beams offer a certain amount of play in order to adjust the bridge in the transverse direction to the conditions. Should it not be sufficient, an additional or separate reinforcement loop can be inserted into the loop joint between two reinforced concrete composite beams to allow a greater distance between the beams.
  • the auxiliary bridge does not require full-surface Ortbetoner contemplatung. Rather, the individual reinforced concrete composite beams are such designed and constructed so that they can be used immediately. According to a further advantageous embodiment of the invention, therefore, they have a rough or profiled surface of the precast concrete part. It can be achieved in the production of precast concrete easily in the formwork of precast concrete, because it is preferably made overhead. Thus, the production of a directly drivable surface of the reinforced concrete composite part does not require a separate manufacturing step.
  • reinforced concrete composite carrier stands out from the prior art, as it consists of extremely simple, namely regular cross sections for the precast concrete and the U-shaped steel profile and therefore requires an extremely low production cost. Since the precast concrete part has a regular rectangular cross-section and also along its longitudinal extent no deviations from the rectangular plan, its production can be extremely rational and largely mechanized or automated by simple means. As a result, an economical production method of the reinforced concrete composite carrier can be ensured.
  • the production of the U-shaped steel profile by edges of relatively thin sheets or alternatively by welding of webs with a lower flange is not a technical challenge dar. Also the connection of the two components of the reinforced concrete composite carrier by pressing or shaking the U-shaped steel profile in the Still fresh precast concrete can be mechanized and very cost effective.
  • the in-situ bonding of adjoining steel composite beams by cast-in-situ casting is easily manageable and represents only a small amount of material. Because the Ortbetonverguss fills only the loop joints juxtaposed steel composite support, ie wide, extending in the longitudinal direction of the bridge grooves formed essentially by the longitudinal sides of the steel composite support become.
  • the modular design of the auxiliary bridge also allows an adjustment of the bridge deck or the bridge course in terms of their gradients to the circumstances, because the loop joints of adjacent reinforced concrete composite support provides a significant game between the carriers.
  • the bridge construction consists of several longitudinal steel composite beams 2 (see. FIG. 2 ), which are already prefabricated and are delivered in this form on site.
  • the composite steel beams 2 consist of a steel section 4 and a precast concrete part 6 and are laid side by side in a longitudinal direction on a prepared support.
  • the bearings of the composite beams 2 may be sheet piles, rubber mounts or steel plates.
  • the precast concrete 6 consists of a concrete slab 24 with long sides 10, narrow sides 40, a bottom 18 and a top 44.
  • the precast concrete 6 has a regular rectangular plan and a rectangular cross section and is 12 to 16 cm thick. Its width is between 1.50 and 3.00 m. It is limp reinforced with a longitudinal and transverse reinforcement and is manufactured in 180 ° or overhead position.
  • the concrete slab 24 represents the only concrete component of the reinforced concrete composite slab 2.
  • the steel profile 4 has a U-shaped cross-section and about the same length as the precast concrete part 6.
  • the U-shaped steel profile 4 is reinforced by perpendicular to the concrete plate 24 and parallel to each other arranged load introduction stiffeners 36, 38. They are welded only on the narrow sides 40 of the reinforced concrete composite beams 2 in order to prevent kinking of the U-shaped steel profile 4 due to the localized load introduction at the bearing points 34 of the reinforced concrete composite beam 2 on bearings not shown.
  • load introduction stiffeners 36 Two types are used, namely smaller triangular load introduction stiffeners 36, which only fill part of the U-shaped cross section of the steel profile 4 and are arranged symmetrically opposite one another.
  • the larger, rectangular load introduction stiffeners 38 almost completely fill the cross section of the U-shaped steel profile 4 (cf. FIGS. 4, 5 ).
  • the load introduction stiffeners 36, 38 are each used alternately in the longitudinal direction of the U-shaped steel profile 4.
  • FIG. 3 shows, inter alia, a sectional view through the U-shaped steel profile 4, which is composed of a steel lower chord 22 and two parallel webs 20 rising at right angles from the steel lower chord 22.
  • the legs carry 20 composite dowel 26, as in FIG. 3 , can be seen on the left in two enlarged views.
  • the composite dowels 26 thus alternate in the longitudinal direction of the steel section 4 with gaps 30, which in the side view of FIG. 3 occupy a slightly larger area than the composite dowels 26.
  • FIG. 9 Their production is in FIG. 9 illustrated.
  • two rows of composite dowels 26 are produced at the free ends 28 of two webs 20 in a single manufacturing step.
  • a special separating cut 46 which can be guided almost continuously and uninterruptedly, two webs 20 with composite dowels 26 are produced from a single workpiece.
  • the separating cut 46 is thereby guided in a special clothoid shape 42, so that similar composite dowels 26 are formed on both webs 20 and form the intermediate space 30 on the respective other web.
  • the illustrated cutting guide for the separating cut 46 in the clothoid form 42 causes the least possible waste.
  • the steel components of reinforced concrete composite carrier 2 show the FIGS. 1 or 1a:
  • the concrete slab 24 is regularly longitudinally and transversely reinforced and has an upper and a lower reinforcement layer 32 (cf. FIG. 6 ).
  • the load introduction stiffeners 36 are welded in the U-shaped steel profile 4, of which only two in the example FIGS. 1 . 1a are shown.
  • At one of the longitudinal edges 10 protrude reinforcing loops 8 in plate plane, but beyond the longitudinal edge 10 addition.
  • they cant over the rectangular cross-section. You are with a lost formwork 16 (see. FIGS. 6 . 7 ) on the underside 18 of the concrete slab 24 (see also Figures 2 . 2a ).
  • a sheet is cut with about 8mm thickness in the manner described above and folded twice in the longitudinal direction, so that the webs 20 and 22 Untergut arise.
  • the precast concrete element 6 is concreted in overhead position, ie rotated by 180 ° about the longitudinal axis.
  • the future top 44 is thus on a formwork floor. He is profiled and Due to future future bottom side 18, however, points in the manufacturing process upwards, so that the steel profile 4 can be shaken before setting the concrete in the precast concrete 6.
  • the steel profile 4 then projects with its composite dowels 20 by a binding depth t (see. FIG. 6 ) into the precast concrete part 6.
  • FIG. 8 shows the connection of two adjacent reinforced concrete composite beams along their longitudinal sides 10: Two reinforcing loops 8 of two adjacent reinforced concrete composite beams 2, which protrude from the precast concrete elements 6 on the longitudinal sides facing each other, each overlap with a separate reinforcing loop 12 and are rigidly connected by a concrete grout 14.
  • the lost formwork 16 may be attached to the underside 18 of the precast concrete part 6.
  • the bridge is driven directly.
  • Guides and fall arresters are installed separately and are not included in the steel composite beams 2.
  • Each prefabricated steel composite beam 2 comprises an open, U-shaped steel profile 4 with two parallel webs 20 and a steel lower flange 22 connecting them.
  • the steel profile 4 is produced by edges.
  • the webs 20 are welded onto the steel lower chord 22 with Halskehlnähten. This allows a material gradation between the lower flange 22 and the web plates 20th
  • the connection between the concrete slab 24 and the steel profile 4 produce the composite dowels 26 at the free ends 28 of the webs 20.
  • the composite dowels 26 are formed from the U-shaped steel profile 4 and therefore steel dowels which project into the concrete slab 24 and in the interstices 30th lie in the installation position lower reinforcing bar 32 of the roadway or concrete slab 24.
  • the composite dowels 26 are made in the steel sheet of the webs 20 by cutting in a special sectional shape, the so-called Klothoidenform 42.
  • the composite dowel 26 is characterized by a high load capacity and high deformation capacity. The fatigue-proof design can be exposed to high dynamic loads.
  • the composite beams 2 have a large bending and torsional rigidity. Only at the end bearing points 34 of the carrier 2 load introduction stiffeners 36, 38 are necessary.
  • the carriers 2 can be designed as Einfeldlyketten or as a continuous system. Passage systems can be realized by bolted tab joints on the lower flange 22 and in-situ concrete grouting of a lap joint in the concrete flange area or in the area of the precast concrete element 6 become. In the overlap shock extend in the longitudinal direction extending rebar, which protrude from the end narrow side 40 of the precast concrete part 6, by about one meter.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Bridges Or Land Bridges (AREA)

Claims (12)

  1. Support composite en béton armé (2) pour une construction de type pont, en particulier une construction de type pont auxiliaire, avec un profilé en acier en forme de U (4) avec deux poteaux (20) et une membrure inférieure en acier (22) sur sa face inférieure et une pièce préfabriquée en béton faiblement armé (6) sur sa face supérieure, le profilé en acier (4) s'encastrant avec des chevilles à scellement (26) sur des extrémités libres (28) des poteaux (20) de l'ordre d'une profondeur d'encastrement (t) dans la pièce préfabriquée en béton (6), caractérisé par une section rectangulaire régulière de la pièce préfabriquée en béton (6) et par un profilé en acier (4) essentiellement exempt de béton à l'éxterieur de la profondeur d'encastrement (t).
  2. Support composite en béton armé (2) selon la revendication 1, caractérisé par des chevilles à scellement (26) réalisées par découpage des poteaux (20).
  3. Support composite en béton armé (2) selon les revendications 1 ou 2, caractérisé par un profilé en acier (4) en une tôle pliée.
  4. Support composite en béton armé (2) selon les revendications 1 ou 2, caractérisé par un profilé en acier (4) en tôles soudées.
  5. Support composite en béton armé (2) selon les revendications 1 à 4, caractérisé par des raidisseurs d'introduction d'une charge (36 ; 38) à des extrémités du profilé en acier (4).
  6. Support composite en béton armé (2) selon les revendications 1 à 5 avec des fers d'armature éxposés et pouvant être coulés avec du béton in situ sur les côtés longitudinaux (10) des supports composites en acier (4), caractérisé en ce que les fers d'armature forment des boucles (8) qui se chevauchent avec des boucles (8) d'un support composite en acier (4) voisin ou avec une boucle d'armature (12) distincte.
  7. Support composite en béton armé (2) selon les revendications 1 à 6, caractérisé par une surface (44) rugueuse ou profilée de la pièce préfabriquée en béton (6).
  8. Support composite en béton armé (2) selon les revendications 1 à 7 pour une construction de type pont en tant que système continu, caractérisé par des assemblages à couvre-joint sur la membrure inférieure (22) et un assemblage par recouvrement sur des côtés étroits (40) des pièces préfabriquées en béton (6) avec un coulage en béton in situ.
  9. Construction de type pont avec plusieurs supports composites en béton armé (2) selon l'une des revendications ci-dessus et qui sont disposés côte à côte de manière à s'étendre en direction longitudinale de pont et qui comprennent un profilé en acier en forme de U (4) avec deux poteaux (20) et une membrure inférieure en acier (22) sur leur face inférieure et une pièce préfabriquée en béton faiblement armé (6) sur leur face supérieure, le profilé en acier (4) s'encastrant avec des chevilles à scellement (26) sur des extrémités libres (28) des poteaux (20) de l'ordre d'une profondeur d'encastrement (t) dans la pièce préfabriquée en béton (6), caractérisée par une section rectangulaire régulière de la pièce préfabriquée en béton (6) et par un profilé en acier (4) essentiellement exempt de béton à l'exception de la profondeur d'encastrement (t).
  10. Procédé pour la fabrication d'une construction de type pont selon la revendication 9, avec les étapes de fabrication suivantes :
    a) fabrication d'un support composite en béton armé (2) avec une pièce préfabriquée en béton (6) et avec un profilé en acier en forme de U (4) avec des poteaux (20) en tant que pièce préfabriquée selon l'une des revendications 1 à 8,
    b) pose des supports composites en béton armé (2) côte à côte en direction longitudinale du pont sur des appuis préparés,
    c) raccordement résistant à la flexion de supports composites en béton armé (2) situés les uns à côté des autres au niveau de leurs côtés longitudinaux (10) se faisant face grâce à un coulage avec du béton.
  11. Procédé selon la revendication 10, caractérisé en ce que, à l'étape a), on réalise des chevilles à scellement (26) au niveau des poteaux (20) du profilé en acier (4) par découpage des poteaux (20).
  12. Procédé selon les revendications 10 ou 11, caractérisé en ce que, à l'étape a), le support composite en béton armé (2) est fabriqué en hauteur et en ce que l'on confère à la pièce préfabriquée en béton (6) une face supérieure (44) rugueuse ou profilée.
EP11007512.4A 2010-09-15 2011-09-14 Poutre composite acier-béton pour construction de pont Active EP2431525B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11007512T PL2431525T3 (pl) 2010-09-15 2011-09-14 Żelbetowy dźwigar zespolony dla konstrukcji mostu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010045453A DE102010045453A1 (de) 2010-09-15 2010-09-15 Brückenkonstruktion

Publications (2)

Publication Number Publication Date
EP2431525A1 EP2431525A1 (fr) 2012-03-21
EP2431525B1 true EP2431525B1 (fr) 2013-11-20

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EP (1) EP2431525B1 (fr)
DE (1) DE102010045453A1 (fr)
PL (1) PL2431525T3 (fr)

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CN106149540A (zh) * 2016-07-19 2016-11-23 长安大学 基于钢混组合桥面板的装配式钢板组合梁桥及其施工方法
CN108252210A (zh) * 2018-04-09 2018-07-06 长沙理工大学 节段现浇uhpc桥梁梁段接头及其施工方法
CN109338866B (zh) * 2018-11-14 2024-03-19 邵旭东 一种适用于大跨径桥梁的超轻型组合梁结构及其施工方法
CN109610310B (zh) * 2018-12-12 2023-07-25 湖南大学 适用于悬臂状态的型钢-uhpc组合桥面结构及其施工方法
CN112663866B (zh) * 2020-12-17 2022-07-19 同济大学建筑设计研究院(集团)有限公司 用于超高层的混凝土连梁结构及其设计、预制和施工方法
CN115928557A (zh) * 2023-01-04 2023-04-07 内蒙古工业大学 一种轻质高强高韧混凝土板钢箱梁组合装配式结构及制备方法

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DE2644990A1 (de) * 1976-10-06 1978-04-13 Hans Dieter Dreyer Brueckentraeger fuer verbundtraegerbruecken
CA2003060A1 (fr) * 1988-11-16 1990-05-16 Pierre Trouillet Procede de solidarisation d'une masse de matiere a un support fonctionnel et dispositifs ainsi obtenus
WO1999037865A1 (fr) * 1998-01-23 1999-07-29 Herbert Geisler Procede de production d'un pont a travee unique ou multiple
EP1056911A1 (fr) * 1998-02-18 2000-12-06 Schmitt Stumpf Frühauf und Partner Ingenieurgesellschaft im Bauwesen mbH Composant mixte prefabrique et procede de fabrication de poutres, notamment pour la construction de ponts
US7627921B2 (en) * 2005-04-15 2009-12-08 Board Of Regents Of University Of Nebraska Girder system employing bent steel plating
DE102008011176A1 (de) * 2008-02-26 2009-09-03 Ssf-Ingenieure Gmbh Stahl-Beton-Verbundträger und Verfahren zu seiner Herstellung
DE102009008826B4 (de) * 2009-02-13 2014-12-11 Ssf Ingenieure Ag Brücke für Eisenbahnen sowie Längsträger und Verfahren für ihre Herstellung

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EP2431525A1 (fr) 2012-03-21
DE102010045453A1 (de) 2012-03-15
PL2431525T3 (pl) 2014-07-31

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