• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a lattice girder (1) for the expansion tunnel-shaped structures, with at least one upper flange (2) and two lower chords (3), each extending in the longitudinal direction of the lattice girder (1) and in its cross section form the vertices of a polygon to each other, wherein the Upper flange (2) and the lower chords (3) are connected to each other via truss braces (4), the opposite truss struts (4) are arranged crosswise and the upper chord (3) above the crossing regions (11).
    公开号:AT14596U1
    申请号:TGM290/2014U
    申请日:2014-07-29
    公开日:2016-02-15
    发明作者:Cord Ole Scharrelmann
    申请人:Sz Schacht Und Streckenausbau Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a lattice girder for the expansion tunnel-shaped structures, with at least one upper flange and two lower chords, each extending in the longitudinal direction of the Gitter¬trägers and form in its cross-section, the vertices of a polygon to each other, wherein the upper flange and the lower chords on Fachwerkstreben verbunden.Dieher addition, the present invention relates to a method for producing a Gitterträger having the features described above.
    In unterertätigen mining and tunneling support frames are used for the iron or steel-reinforced Beton¬ausbau, which serve the direct support of the excavated Gewölbes. Subsequent expansion takes place in cast-in-situ concrete using shotcrete. The support frame remains within the created concrete outer shell. In addition, support frames are also used for the production of concrete inner shells, wherein the expansion can be done by pouring the support frame with concrete, preferably using rail-guided formwork carriages. For the production of the support frame lattice girder are used, which can be assembled on site in a lined-up in the circumferential direction of the expansion grid sheet. Compared with solid-walled carrier profiles, their advantage lies in the material and weight savings as well as in the avoidance of undesired cavities due to the spray shadow that occurs. Thanks to the open structure of the lattice girders, these enable a homogeneous construction of the concrete shell, within which they achieve a high quality of jointing and, in addition to the used reinforcing steel mats, serve as additional reinforcement.
    In order to enable space-saving stackability of the lattice girders at approximately constant material usage and thus to increase the density of the stacked lattice girders, EP 2 372 082 A2 discloses transverse webs which connect strut parts of truss struts of the lattice girder and stiffen the lattice girder, with a distance to the upper chord and with a distance to the lower chords, wherein the distance to the upper chord and the distance to the lower chords should have a ratio of 1: 2 to 1: 6 to each other. In practice, however, it has been found that the lattice girders described above allow stackability, but the static load bearing capacity of the lattice girders is low and the lattice girders bend slightly during transport and assembly of the lattice arches, which is disadvantageous for the concrete shell created using the lattice arches is.
    The object of the present invention is to provide a lattice girder for the expansion tunnelför¬miger structures and a method for producing such a lattice girder available, wherein the lattice girder has a high static load capacity and, preferably, can be stacked to save space. Incidentally, the lattice girder should be producible in a simple manner and beigeringen costs in particular by resistance welding.
    To achieve the above object, a lattice girder with the initially beschrie¬benen features is proposed, in which opposite truss struts are crosswise arranged and the upper chord is arranged above the crossing areas of the truss struts. Preferably, the upper flange lies directly on both truss struts and is supported by both truss struts. This leads to a considerable improvement in the static load capacity of the lattice girder, so that the probation function of the lattice girder is ensured to a high degree. In a lattice girder with a plurality of crossed Fach¬werkstrebenpaaren can be at the same height of the crossing areas also achieve a simple spacing of the upper belt of the lower chords and thus a high dimensional stability of the geometry of the lattice girder. As a result, the lattice girder according to the invention thus obtained is characterized by a very good load-bearing behavior in combination with concrete, wherein in particular the absorption of tensile and compressive forces is improved over the lattice girders known from the prior art.
    At the same time, a sufficiently large contact surface for one or more upper belts (e) is predetermined by the crossed truss struts, which simplifies the manufacture of the truss. In this connection, the method according to the invention provides for opposing truss struts to be arranged in pairs in a crosswise manner and to be welded together at the intersection, so that a dimensionally stable stiffening element is formed. Several such stiffening elements can then be welded first to the lower chords. Subsequently, the upper belt can be placed on the crossed truss struts of Verstei¬fungselemente and is thus always securely held and guided during welding with the Versteifungsele¬. The connection of two truss braces miteinander mitderan to a stiffening element and / or connecting the stiffening elements with the lower straps and the upper straps can be done by resistance welding, which allows a simpa¬che, largely automated and cost-effective production.
    In a preferred embodiment of the invention, each truss strut has a central bent or bent connecting portion. The truss truss connecting portions and strut portions further adjacent to the connecting portions may form a throat-like bearing and / or receiving area for the upper chord in a cross-sectional view of the truss, with the upper chord disposed above the intersection at least partially between the truss struts. As a result, the upper chord dips in this embodiment of the invention at least be¬reichsweise in the area between the crossed truss braces. This contributes to a high static load capacity of the lattice girder, with the upper girder down over the truss struts, i. to the lower straps, and supported to the sides. The Ober¬gurt can also immerse completely in the gebilde¬ten between the opposite truss struts bearing and / or receiving area or even projecting up against the Fach¬werkstreben.
    In an alternative embodiment of the invention may be provided above the Kreu¬zungsbereich at least one cross brace, the cross brace is preferably welded from below against the opposite truss braces and wherein the Bergberg from above rests on the cross brace. At least one transverse strut may be arranged between two intersection regions which follow the longitudinal direction of the lattice girder, preferably centrally between the intersection regions. Further preferably, the lattice girder is designed as a 4-belt lattice girder with two upper straps and two lower straps, wherein the two outer straps are supported on the transverse brace and can preferably rest against the sheave struts from the outside. The lattice girder according to the invention thus obtained is likewise characterized by a very good composite load-bearing behavior, in particular by improving the absorption of tensile and compressive forces in comparison with the lattice girders known from the prior art.
    Above the crossing regions of the truss struts, the upper flange can be laterally welded to the opposite truss struts in the region of the connecting sections, which further simplifies production.
    Each truss brace is rod-shaped and preferably formed in one piece. More preferably, each truss strut has two up, i. in the direction of the top chord, the rectilinear strut sections converge toward one another in a U-shaped or U-shaped manner, wherein the strut sections are connected to one another by a bent or bent connecting section welded to the top chord. The lower free ends of the truss strut may be bent or angled in the direction of the longitudinal axis of the lower chords and form foot sections over which the truss strut is welded to the lower chord. Basically, it is also possible that the truss brace is mehrtei¬lig formed and formed by a plurality of welded together strut parts.
    For further stiffening of the lattice girder and to increase the carrying behavior of the lattice girder, it is expedient if the truss struts lie directly opposite one another in the crossing area and, preferably, are welded together in the crossing area. As a result, the reinforcement properties of the grid carrier can advantageously be influenced. In this case, it is basically sufficient if the welded connections between the framework struts are provided on one longitudinal side of the lattice girder, so that the production process of the lattice girders is further simplified.
    The crossing angle between the crossed truss braces has a significant impact on the carrying capacity of the truss girder. In addition, by varying the crossing angle, the height and width of the lattice girder can be changed. Preferably, the crossing angle between the crossed strut sections is between 30 ° and 90 °, more preferably about 45 ° to 60 °.
    The (vertical) distance of the crossing region of opposing truss braces from the top chord may preferably correspond to less than half the height of the truss, more preferably less than one third of the height of the truss. However, it is particularly preferred that the distance between the crossing areas and the mountain is as small as possible. This has a further advantageous effect on the reinforcement properties of the lattice girder and its load-bearing behavior in combination with concrete.
    In a preferred embodiment of the invention it is provided that in the longitudinal direction of the lattice girder successive strut sections are alternately crossed by opposing Fachwerkstreben. In other words, the opposing sheave struts are hooked to each other with the bridging sections, wherein one strut section of a truss brace at its end facing the upper chord is passed through the plane formed by the opposite truss brace and the lower chord brace connected to the opposite sheave strut. The above-described structural design of the lattice girder according to the invention leads to a high rigidity of the lattice girder, in particular when the crossed strut parts are welded together. For a simple and cost-effective production of the lattice girder, the truss struts can be designed substantially the same, i. H. have a same Geo¬metrie and length. The truss struts in pairs opposite one another can then be offset in the longitudinal direction of the upper belt, in particular offset by the thickness of the crossed strut sections, in order to allow the connection or bridging sections to be hooked into one another. Basically, differently shaped truss braces may be provided on the longitudinal sides of the lattice girder, wherein the connection or. Bridge portion of a first truss brace of a crossed strut pair is greater than the connection or bridge portion of the other truss strut of the strut pair and wherein the truss struts of the strut pair are crossed such that one Fach¬werkstrebe with the larger connecting portion engages over the other truss strut with the kleiner¬ren connection portion and the smaller connection portion is crossed by the larger connection portion.
    In order to ensure the stackability of the lattice girder according to the invention, the composite of the truss struts with the straps can be free of transverse struts. The structural design of the lattice girder described above permits a high density of stacked lattice girders. If it does not depend on the stackability of the lattice girders, for further stiffening of the lattice girder it is possible to provide transverse struts resting on the lower girders, which are welded to the lower girths and / or to the Fachwerk struts. This advantageously affects the bending and buckling behavior of the lattice girder. When the truss struts are each formed in a side view of the truss girder from a roof-shaped or bent bar having end portions angled away from and facing away from each other, which leg portions may be disposed on and parallel to the skids, it may alternatively be provided with transverse struts to arrange the foot sections and to weld in the area of Fußab¬schnitte with the truss struts.
    Incidentally, the lattice girder may have at its respective ends anchor plates, which may for example each have two isosceles gussets, which are arranged in a cross-sectional view of the lattice girder V-shaped to each other. The angle plates can each connect the upper flange with a lower flange. Such anchor plates are already known from EP 2 372 082 A2.
    In particular, there are a variety of ways to design and develop the Gitterträ¬ger invention, reference being made on the one hand to the dependent claims and on the other hand to the following detailed description of preferred Ausführungsbei¬spiele the invention with reference to the drawings. 1 schematically shows a perspective view of a section of a first lattice girder according to the invention obliquely from above, [0019] FIG. 2 shows a schematic plan view of the section of the lattice girder shown in FIG. 1, [0020] FIG 3 shows the section of the lattice girder shown in FIG. 1 in a cross-sectional view, and [0021] FIG. 4 shows a schematic cross-sectional view of a further embodiment of a lattice girder according to the invention.
    1 to 3, a portion of a lattice girder 1 for the expansion tunnel-shaped structures is shown, wherein the lattice girder 1 has a top flange 2 and two bottom straps 3. The top flange 2 and the bottom straps 3 are above bar-shaped truss struts 4 as Ausstei¬ Fung elements connected to each other, wherein a plurality of truss braces 4 provided on both longitudinal sides 5, 6 of the lattice girder 1 and arranged one behind the other in the longitudinal direction. The truss struts 4 provided on different longitudinal sides 5, 6 in this case span planes E1, which are inclined in the direction of the central longitudinal axis of the truss girder 1. The belt bars 2, 3 are arranged parallel to one another and form in cross-section the vertices of a triangle. This is shown in FIG.
    Each truss brace 4 has a central curved connecting portion 7 for attachment to the upper flange 2 and two elongate substantially straight Streben¬abschnitte 8, the roof or Λ-shaped converge towards each other and at their upper geschlos¬senen ends in the middle Pass connecting section 7. At the lower free end of the strut sections 8, these go over in bent and axially parallel to the respective Unter¬gurt 3 extending foot sections 9 of the respective truss brace 4. About the Fußab¬schnitte 9 the truss struts 4 are welded to the lower chords 3 via welds 10. Here are the foot sections 9 from above on the lower chords 3. In principle, however, it is also possible for the truss struts 4 to be welded to the foot sections 9 laterally on the lower straps 3.
    As is apparent from FIGS. 1 to 3, the straight strut sections 8 of ge¬genliegenden truss struts 4 are arranged crosswise. By means of the upper ends of the rectilinear strut sections 8 and the connecting sections 7 of the opposite truss struts 4, which are connected to one another via the connecting sections 7, a throat-like bearing or receiving region 12 for the upper flange 2 is created, wherein the upper flange 2 above the crossing region 11 is at least partially interposed between the truss struts 4 ¬ordnet and rests directly on the rectilinear strut sections 8 and is supported directly on the Stre¬benabschnitte 8. The upper flange 2 is thus arranged in the region between the frame struts 4 above the crossing regions 11 and laterally welded to the Fach¬werkstreben 4 in the connecting sections 7 via welds 14. Here, the top flange 2 over the shed struts 4 according to the cross-sectional view shown in FIG. In principle, however, the upper flange 2 and the truss struts 4 can also be aligned.
    As can be seen in particular from FIG. 1 and FIG. 3, the crossed Strebenab¬schnitte 8 of opposite truss braces 4 directly against each other and are in the crossing regions 11 via welds 13 connected to each other. Here are
    Welds 13 provided in the crossing regions 11 only on a longitudinal side 5, 6 of the Gitter¬trägers 1, but in principle can also be provided on both opposite longitudinal sides 5, 6.
    The illustrated embodiment of the lattice girder 1 is characterized by a sufficiently large support surface for the upper flange 2, a high static load capacity and excellent reinforcement properties. In this case, by changing the crossing angle α (FIG. 3) between the rectilinear strut sections 8, the distance between the upper flange 2 from the lower straps 3 and the height of the girder 1 and the width of the girder 1 transverse to the longitudinal direction can be easily specified. In order to ensure a high static load capacity, the crossing angle α is preferably between 90 ° and 45 °. For the same purpose, it is further provided that the distance A of the crossing region 11 of crossed strut pieces 4 from the top chord 2 is preferably less than one quarter of the total height H of the truss 1, the total height H of the truss 1 being the distance between the plane defined by the longitudinal center axes of the bottom chords 3 and the central longitudinal axis of the upper belt 2 corresponds.
    The planes of symmetry E1 of the truss braces 4 are offset laterally outwardly in the region of the upper flange 2 against the planes E2 spanned by the axis of the upper flange 2 and the axis of the respective lower flange 3. In the region of the lower chords 3, the planes of symmetry E1 of the truss struts 4 are preferably also outwardly offset from the planes E2 spanned by the axis of the upper chord 2 and the axis of the respective lower chord 3, but may also pass through the axes of the respective lower chord 3.
    As further shown in particular from Fig. 1, the longitudinal direction of the Obergurts2 successive strut sections 8 of two opposite Fachwerkstreben4 are alternately crossed. The opposing truss braces 4 are in the Längsrich¬tung of the lattice girder 1 offset by the thickness or the diameter D of the strut sections 8 to each other, wherein the truss struts 4 are hooked together with the connecting portions 7iningehen and wherein each strut section 8 a truss brace 4 on the upper closed end is passed through the plane formed by the opposite truss brace 4 and associated Untergurt 3 level. This further contributes to a high bearing capacity of the lattice girder 1.
    As is also apparent from FIGS. 1 to 3, the composite of Fachwerkstre¬ben 4 with the straps 2, 3 is preferably formed free of transverse struts, so that the Gitter¬träger 1 is easily stackable.
    To produce the lattice girder 1, two opposing truss struts 4 with the rectilinear strut sections 8 are arranged crosswise and the truss struts 4 are welded together at the points of intersection of the strut sections 8 to form a stiffening element that is stable in form. The stiffening elements are then connected via the foot sections 9 of the truss struts 4 with the lower chords 3 by resistance welding. Subsequently, the top flange 2 is placed above the crossing sections 7 of the opposite truss struts 4 of the stiffening elements on the crossed rectilinear strut sections 8 and connected laterally to the truss struts 4 in the region of the connecting sections 7 of the truss struts 4 by resistance welding. Welds 14 between the Fachwerk¬ struts 4 and the upper flange 2 are accordingly provided in the boundary regions between the respective connecting portion 7 and the upper flange 2. This allows a simple and cost-effective production of the lattice girder 1.
    FIG. 4 shows a schematic cross-sectional view of a further embodiment of a lattice girder 1 according to the invention. The lattice girder 1 has two upper straps 2 and two lower straps 3. The straps 2, 3 extend in the longitudinal direction of the lattice girder 1 and form in its cross section the corner points of a quadrilateral. The straps 2, 3 are connected to each other via stabförmi¬ge truss braces 4 as stiffening elements. Structure and Anord¬ tion of the truss struts 4 to each other and in the longitudinal direction of the lattice girder 1 correspond structure and arrangement of the truss struts 4 in the grid carrier shown in Figures 1 to 3. The truss struts 4 each have a central curved Verbindungsab¬ section 7 for attachment the respective upper flange 2 and two elongated, substantially geradlinige strut sections 8, the roof or Λ-shaped converge on each other and at its upper closed ends arcuately in the middle connecting portion 7 on. At the lower free ends of the strut sections 8 these go in bent and parallel to the respective lower flange 3 extending foot sections 9 of the respective Fach¬werkstrebe 4 over.
    Also in the embodiment of the lattice girder 1 shown in Fig. 4, the gerad¬linigen strut sections 8 of opposite truss braces 4 are arranged crosswise. The upper straps 2 are above the crossing regions 11 of the truss struts 4 angeord¬net and indirectly supported on both truss struts 4. The strut sections 8 of opposite truss struts 4 lie directly against one another and are connected to one another in the intersection areas 11 via welds 13.
    For supporting the upper straps 2 cross struts 15 are provided, which are welded from below bzw.von inside with the truss struts 4 in the connecting portions 7. This is not shown in detail in FIG. 4. Here, in each case, a transverse strut 15 can be provided between two intersection regions 11 of adjacent truss struts 4 that are adjacent in the longitudinal direction.
    As can be further seen from Fig. 4, the upper straps 2 may be welded to the truss braces 4 in the region of the connecting portions 7, with welds 14 located internally, i.e., in the region of the connecting portions 7. between the two upper straps 2, are provided in the boundary regions between the respective Ver¬ binding portion 7 of a truss brace 4 and the respective upper flange 2.
    It is not shown that the upper straps 2 can also be welded directly 15 additionally with the cross braces.
    According to FIG. 4, it is preferably the case that the plane of symmetry E1 of the respective compartment strut 4 extends laterally offset and parallel to the plane E2 spanned by the axis of the respective upper belt 2 and the respective lower belt 3. In the region of the upper flange, the planes of symmetry E1 of the truss braces 4 are offset inwards relative to the planes E2 spanned by the axles of the upper straps 2 and the lower straps 3, while the planes of symmetry E1 in the region of the lower straps 3 are opposite the respective axles E2 through the upper straps 2 and Basically, however, it is also possible here for the planes of symmetry E1 to run through the axes of the respective lower flange 3.
    It will be appreciated that the features of the lattice girder 1 shown in Figs. 1 to 3 and the features of the lattice girder 1 shown in Fig. 4 may be provided on one or the other lattice girder 1 as required, though not in detail is beschrie¬ben.
    REFERENCE LIST 1 lattice girder 2 upper girder 3 lower girder 4 truss strut 5 longitudinal side 6 longitudinal side 7 connecting section 8 strut section 9 foot section 10 welding point 11 crossing area 12 storage and / or receiving area 13 welding point 14 welding point 15 cross struts
    权利要求:
    Claims (9)
    [1]
    Claims 1. lattice girder (1) for the expansion tunnels-shaped structures, with at least one upper flange (2) and two lower chords (3), each in the longitudinal direction of the lattice girder (1) erstre¬cken and form in its cross-section the vertices of a polygon to each other in which the top rail (2) and the bottom straps (3) are connected to each other by truss struts (4), opposite truss struts (4) being arranged crosswise and the top girth (3) being located above the crossing areas (11) and wherein the ge crossed truss struts (4) form a central groove-like bearing and / or support area (12) for the upper flange (2) and the upper flange (2) above the crossing region (11) at least partially between the truss struts (4) is arranged, characterized in that each truss brace (4) has a central curved connecting section (7) for attachment to the upper flange (2) and that the connecting sections (7) of the Fach¬werksstreben (4) provided opposite two longitudinal sides (5, 6) of the lattice girder (1) are arranged opposite each other and penetrate to form bearing and / or support areas (12).
    [2]
    2. lattice girder (1) according to claim 1, characterized in that the upper flange (3) on both truss braces (4) rests directly and is supported on both truss braces (4).
    [3]
    3. lattice girder (1) according to any one of the preceding claims 1 or 2, characterized gekenn¬zeichnet that the truss struts (4) free of cross struts ver¬bunden with the straps (2, 3) and / or that only on the lower chords ( 3) resting transverse struts are provided, which are welded to the lower chords (3).
    [4]
    4. lattice girders (1) for the construction of tunnel-shaped structures, with at least one upper girth (2) and two lower girths (3), each extending in the longitudinal direction of the lattice girder (1) and forming in its cross-section the vertices of a polygon to each other, wherein the top rail (2) and the bottom straps (3) are connected to each other by truss braces (4) and wherein opposing truss braces (4) are arranged crosswise and the top straps (3) are arranged above the crossing regions (11), characterized in that at least one transverse strut (15) is provided above the crossing region (11), wherein the transverse strut (15) is preferably welded from below against the opposite truss struts (4) and wherein the upper flange (2) engages from above on the transverse strut (15 ) rests.
    [5]
    5. lattice girder (1) according to claim 4, characterized in that two upper straps are provided, wherein the upper straps (2) from the outside against the truss struts (4) and rest on the cross brace (15) are supported.
    [6]
    6. lattice girder (1) according to any one of the preceding claims, characterized in that the upper flange (2) with opposite truss struts (4) is ver¬ welded laterally.
    [7]
    7. lattice girder (1) according to any one of the preceding claims, characterized in that the truss struts (4) in the crossing region (11) directly against each other and that, preferably, the truss struts (4) in the crossing region (11) miteinan¬der welded are.
    [8]
    8. lattice girder (1) according to any one of the preceding claims, characterized in that the distance of the crossing areas (11) of the truss braces (4) of the upper chord (2) less than half the height, preferably less than one third of the height of the gritter carrier ( 1) corresponds.
    [9]
    9. lattice girder (1) according to one of the preceding claims, characterized in that in the longitudinal direction of the lattice girder (1) one behind the other strut sections (8) of opposite truss struts (4) are alternately crossed and / or that opposite crossed truss struts (4) equal out ¬bildet and offset in the longitudinal direction of the lattice girder (1) are arranged to each other. 4 sheets of drawings
    类似技术:
    公开号 | 公开日 | 专利标题
    EP2191073B1|2011-02-09|Formwork configuration for the cantilever construction of bridges
    EP2372082B1|2019-10-23|Formwork girder
    AT14596U1|2016-02-15|Lattice girder for the construction of tunnel-shaped structures
    EP3344823A1|2018-07-11|Supporting beam for ceiling systems, ceiling system and method for the production thereof
    CH628955A5|1982-03-31|ROAD EXTENSION, ESPECIALLY FOR PITS, AND METHOD FOR THE PRODUCTION OF THE LINE EXTENSION.
    DE102013021701A1|2015-02-05|girder
    DE2114494B2|1979-04-05|Double shell reinforced concrete hall slab mesh - has triangular lattice girder connectors and anchor bars between chords and zigzag struts
    DE202012103457U1|2012-09-28|girder
    DE202011004948U1|2012-07-09|Lattice girder for a lattice girder extension frame
    DE202017101837U1|2017-06-27|Double wall transport anchor for grid systems
    DE202012011689U1|2013-12-03|girder
    CN209799011U|2019-12-17|Structural unit body with stable prestress
    DE60007824T2|2004-12-02|girder
    DE2153495A1|1973-05-10|PREFABRICATED CEILING PANEL FOR ASSEMBLY CONSTRUCTION
    DE2234941A1|1974-01-31|REINFORCEMENT FOR PRE-FABRICATED REINFORCED CONCRETE WALLS OR SLABS
    DE2242202A1|1974-03-07|DEVICE FOR MANUFACTURING REINFORCED CONCRETE WALLS IN THE IN-SITE CONCRETE PROCESS
    DE112012004226T5|2014-07-10|Shear reinforcement for reinforced concrete structure
    EP2706194A2|2014-03-12|Formwork girder
    WO2009043748A1|2009-04-09|Framework arrangement for the cantilever construction of bridges
    EP1969188B1|2012-10-31|Bridge construction
    DE202010008620U1|2011-12-28|reinforcing cage
    AT402419B|1997-05-26|Lattice girder
    DE69721606T2|2004-02-19|Flat composite girder structure made on site for unidirectional concrete slabs
    CH378505A|1964-06-15|Precast reinforced concrete beams with truss-like reinforcement for the production of hollow stone ceilings without formwork
    EP1728736A1|2006-12-06|Silo
    同族专利:
    公开号 | 公开日
    DE202013011404U1|2014-11-04|
    CH708436A2|2015-02-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4054013A|1975-04-14|1977-10-18|Ernesto Pitto|Metal beam system for steel-concrete structures|
    DE2733941A1|1976-07-29|1978-02-02|Bautechnik Anstalt|LATTICE GIRDER|
    WO2004070131A1|2003-02-10|2004-08-19|George Wegler|An arrangement of truss cords|
    DE202010004389U1|2010-03-31|2010-07-01|Bochumer Eisenhütte Heintzmann GmbH & Co. KG|girder|DE102016124226A1|2015-12-16|2017-06-22|Technische Universität Dresden|Lattice girder for concrete structures|
    DE102016124232A1|2015-12-16|2017-06-22|Technische Universität Dresden|Truss arrangement with mineral matrix material|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE202013006855|2013-07-31|
    [返回顶部]