EP0016008B1 - Bewehrungsmatte - Google Patents

Bewehrungsmatte Download PDF

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Publication number
EP0016008B1
EP0016008B1 EP79900574A EP79900574A EP0016008B1 EP 0016008 B1 EP0016008 B1 EP 0016008B1 EP 79900574 A EP79900574 A EP 79900574A EP 79900574 A EP79900574 A EP 79900574A EP 0016008 B1 EP0016008 B1 EP 0016008B1
Authority
EP
European Patent Office
Prior art keywords
mat
reinforcement
bars
movable
guide members
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.)
Expired
Application number
EP79900574A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0016008A1 (de
Inventor
Franz Bucher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from AT450678A external-priority patent/AT354028B/de
Priority claimed from AT277279A external-priority patent/AT360214B/de
Application filed by Individual filed Critical Individual
Publication of EP0016008A1 publication Critical patent/EP0016008A1/de
Application granted granted Critical
Publication of EP0016008B1 publication Critical patent/EP0016008B1/de
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/0627—Three-dimensional reinforcements composed of a prefabricated reinforcing mat combined with reinforcing elements protruding out of the plane of the mat
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/04—Mats

Definitions

  • the invention relates to a reinforcement mesh made of bars that cross each other, with at least a first mesh area for covering the positive moments, in which all the intersection points are welded, and with at least a second mesh area, in which only a part of the intersection points is welded, thereby causing mesh parts to lie in one another are formed, of which at least one mat part, the length of which in the direction of the tensile reinforcement corresponds only to part of the total length of the reinforcement mat in this direction, can be moved in a length required for covering negative moments by means of a handlebar from the plane of the positive reinforcement into a plane of negative reinforcement is, while at least one mat part remains firmly in the level of the positive reinforcement.
  • Such a reinforcement mat is known for example from AT-A-295.811 and 295.812.
  • Such a mat can be manufactured in a conventional welding system and can also be transported and stored in a stack to save space, while parts of the mat can be pulled out of the second mat area at the construction site if required.
  • the mat can therefore be laid in a flat state like an ordinary mat, but can also be used to absorb shear stresses and to cover opposite moments after bending up the movable mat parts.
  • the movable mat parts consist of end sections of individual reinforcing bars that are not welded to the other bars. According to AT-A-295.812, due to a different division of the welded crossing points, the movable mat parts also have reinforcing bars that cross each other.
  • the handlebars that enable the movable mat parts to be brought out are formed by the reinforcing bars themselves, which are subjected to tension. This means that they have to be bent twice in each case, which means that with rods made of high-quality steel there are difficulties with diameters from 4 mm.
  • bars with much larger diameters are mostly used as tensile reinforcement.
  • the resulting negative reinforcement shifts from the edge inwards, i.e. to the side of the handlebars, and thus, when the edge of the fixed mat parts is placed on a support, in the projection onto the fixed mat part away from the support.
  • the negative tensile reinforcement is therefore not in a position which is most favorable for covering the negative moments occurring above the support.
  • FR-A-13 58 658 shows a reinforcement mesh, which consists of two interlocking mesh parts, which are created by welding selected crossing points and can be moved in two directions in the mesh plane.
  • the two mat parts can be pulled apart by a stitch length or width, so that different areas can be reinforced with a single, size-changing mat.
  • the two mat parts are the same size or only slightly different, since they must overlap each other sufficiently in any case. A movement of a mat part of the plane to cover opposite moments is neither provided nor conceivable.
  • one or more longitudinal bars can be bent into a position parallel to the mat plane, the cross bars being rotated by 90 ° and running in this area like a bracket.
  • the longitudinal bars must be bent twice, so that the bending problems already mentioned arise with larger bar diameters.
  • DD-A-96.306 also shows a reinforcement element for connecting two reinforcement mats arranged at a distance from one another, which consists of a zigzag-shaped rod, the curvature areas of which are shaped like hooks and can be hung in each rod of the upper or lower mat.
  • DE-B-1 609 799 and US-A-2 314 456 describe collapsible Reinforcement meshes, which consist of mesh strips, the cross bars of which are shaped at one end to form eyelets. The eyelets are hooked into the outermost longitudinal bar of another mat part, whereby the mat parts are rotatably connected.
  • the object of the invention is to increase the mobility of these mat parts in a reinforcement mat of the aforementioned type with mat parts which can be moved from the plane of the reinforcement mat to a second reinforcement plane in such a way that they provide the best possible coverage of those occurring in the second reinforcement plane negative bending moments can be used.
  • each reinforcement bar of a movable mat part which is provided for the negative tensile reinforcement in the main load-bearing direction is a piece of rod which is independent of the positive tensile reinforcement, and the handlebars can give the movable mat part a movement in this way that when the movable mat part is projected onto the fixed mat part, the edge of the movable mat part can move beyond the edge of the fixed mat part containing the positive tensile reinforcement in the direction of a support.
  • the reinforcement mat according to the invention such as simple reinforcement mats, which can be transported and laid, therefore enables an almost optimal adaptability to the negative bending moments of the support area to be covered.
  • the movable mat parts can also move towards the support when being pulled up in the main direction of support. They are therefore not necessarily removed from the support with increasing height as in the prior art according to AT-A-295.812. Above all, a large number of small, movable mat parts for a wide variety of applications can be contained in the reinforcement mats.
  • each reinforcing bar of the movable mat part for the negative tensile reinforcement is a separate piece of a reinforcing bar running in the same direction in the grid pattern. According to this version, it is possible, for example, to achieve the minimum coverage of clamped components of a reinforcement mesh with standardized bar spacing, cut through every sixth bar in the second mesh area and pull it up parallel to the mesh level, so that five continuous bars remain in the mesh level.
  • each movable mat part is attached to at least one pair of links which are connected to different, mutually parallel reinforcement bars both in the fixed and in the movable mat part.
  • This version in particular allows the desired position of the movable mat part to be achieved by simply pulling it up, since reinforcement bars of the mat are not bent, but the movement takes place via its own handlebars, which preferably run outside the grid grid. When pulling up the mat part, it is also easier to take into account the desired thickness of the component to be manufactured.
  • a reinforcement mat according to the invention can be stacked with the same space requirement as ordinary reinforcement mats, since parallel reinforcement bars of the fixed and the movable mat part are arranged in the same plane and the reinforcing bars of the movable mat part crossing them on one side and those of the fixed mat part on the other side .
  • the thickness of the reinforcement mat therefore never exceeds the sum of the diameters of the two reinforcement parts of a mat (lengthways and crossways).
  • Handlebars located outside the grid do not protrude from the reinforcement mat. If your own handlebars are not provided outside the grid, but are formed by separate pieces of reinforcement bars, they also do not protrude from the reinforcement mat.
  • At least one pair of links can be moved in a normal plane to the reinforcement mat. They are also preferably of the same length and can be moved in parallel, so that the movable mat part can be pulled up parallel to the mat plane, but they can also be of unequal length or cannot be moved in parallel. The movable mat part will then lie in the pulled-out position at an angle to the mat plane.
  • the handlebars act closer to the movable mat part with respect to the first mat area of the reinforcement mat than to the fixed mat part.
  • the raised, movable mat parts then protrude beyond the mat edge. This achieves the required negative reinforcement for continuous fields, since the two movable mat parts of two reinforcement mats, each spanning one field, partially overlap each other. Hiebei occurs as an additional, particularly interesting effect, the fact that the negative moments are also almost optimally covered, because
  • the handlebars serve primarily as a transport connection and for guiding the movable mat parts, it is preferably provided that they consist, in a manner known per se, of a material that differs from the material of the reinforcing bars, in particular an inferior material.
  • they can be made of thin wire, plastic, etc.
  • the handlebar ends can be welded or otherwise fastened to the reinforcement bars, they can also be provided in a manner known per se with eyelets or the like, which enclose the reinforcement bars or their separated pieces with rotational resistance.
  • the resistance to rotation can be given, for example, even after the reinforcement mats according to the invention have been stored for a short period of time due to the rust forming.
  • the rotational resistance can also be achieved by dimensioning at least one inner diameter of the eyelets or windings to be smaller than the rod cross section, so that they are elastically expanded when the handlebars are mounted on the rods.
  • the handlebars are connected to the reinforcement bars running transversely to the direction of support or their separated pieces of both mat parts, but it is also possible to connect the handlebars to the reinforcement bars running in the direction of support or their separated pieces or each handlebar with a longitudinal and a transverse one Connecting rod.
  • a method for producing reinforcement meshes according to the invention, of the type specified in the preamble of claim 9, is characterized in that after welding, part of the reinforcement bars is cut through in the second mesh area.
  • Handlebars arranged outside the grid are preferably welded or fastened after the welding, but before the reinforcement bars are cut through, in order to make an additional holder for the otherwise freely movable mat parts in the production system unnecessary.
  • the reinforcement mat according to the invention which can be both uniaxial and biaxial, has reinforcing bars 4, 5 which cross each other and run at least in every first mat area 1 in a customary grid pattern.
  • the reinforcement bars 4, 5 can be reinforced in the first mat area 1, which is provided for positive load moments, by additional reinforcement bars 6 for adaptation to the torque line.
  • reinforcement bars 4 ', 5' are also arranged, which run parallel to the bars 4, 5 in and / or outside the grid grid.
  • the first mat area 1 in which there are only rods 4, 5, all the intersection points 3 are welded to one another, while in each further mat area 2 only a part of the intersection points 3 are welded, namely the rods 4 and 5.
  • each second mat area 2 two nested and 5.
  • two interlocking mat parts 9 and 10 are formed in every second mat area 2.
  • the mat part 9 is movably connected to the mat part 10 via at least one handlebar 8 or 8 ', and can be pulled up from the mat plane to cover negative moments.
  • the links 8 preferably move in pairs in a normal plane to the reinforcement mat.
  • the reinforcement bars 5 'of the second mesh area are formed by cutting off the reinforcement bars 5 and lie as separate pieces 7 in the grid pattern. If reinforcing bars 4 'are also formed by cutting reinforcing bars 4, they form separate pieces 14 which are also in the grid pattern (FIGS. 7, 12, 16).
  • a support area of a first uniaxial reinforcement mat according to the invention is shown.
  • the longitudinal reinforcement bars 5 run below the transverse reinforcement bars 4 and all crossing points 3 are welded.
  • the longitudinal reinforcement bars 5, which are not cut, run in the fixed mat part 10 above the cross bars 4, and the separated pieces 7, which extend in the direction of support and which belong to the movable mat part 9, lie in the same plane as the longitudinal bars 5 these associated cross bars 4 of the mat part 9 lie on the longitudinal bars 5 or the separated pieces 7. Since the mat width corresponds to the length of the cross bars 4 ', these are uncut.
  • the remaining in the fixed mat part 10, arranged as the lowest cross bars 4 are only with the longitudinal bars 5, and the extending in the movable mat part 9, arranged as the topmost cross bars 4 'are welded only to the separated pieces 7.
  • the cross bars 4, 4 'of both mat parts 9, 10 are connected to one another by means of four links 8 which are arranged to be movable in parallel and have the same length.
  • the connection of each link 8 with the fixed mat part 10 is further away from the first mat area 1 than its connection with the second mat part 9.
  • the links 8 can be welded to the crossbars 4, 4 'or else connected.
  • An advantageous solution is shown in FIG. 5 in detail, in which the ends of the links 8 are shaped into eyelets or windings 11 which enclose the cross bars 4, 4 '.
  • the links 8 are preferably made of a different material than the reinforcement bars, for example made of aluminum wire or plastic, and run outside the grid.
  • the movable mat part 9 guided on four links 8 is moved beyond the mat edge parallel to the mat plane when it is lifted.
  • the extent of the protrusion over the edge of the mat is determined by the angle of rotation, and at the same time an adaptation to the desired ceiling thickness can be achieved (FIG. 3).
  • the pulling up of the mat part 9 thins the steel cross section in the mat plane in the support region a, as is desired to adapt to the positive moment line, and covers the negative moments.
  • FIG. 4 The top view (FIG. 4) or also from FIGS. 6 and 7, in which the laying of two reinforcement mats is shown in a slightly different embodiment.
  • Two reinforcement mats according to the invention are placed on the support 12, which form the reinforcement for a continuous field.
  • the movable mat parts 9 are each pulled up and moved over the mat edge, overlapping one another. The overlap leads to another significant advantage: in area d, in which the greatest negative moments occur, the largest steel cross-section is also reached, while the areas adjoining on the side have a reduced negative reinforcement.
  • the design according to edn. 6 and 7 differs from the reinforcement mat shown in FIGS. 1 to 4, in that the cross bars 4 'of the movable mat part are cut from cross bars 4 and represent separated pieces 14, since the width of the movable Mat part 9 is less than the width of the entire mat.
  • the protruding ends 13 of the turns 11 of the link 8 or the turns 11 themselves can simultaneously serve as spacers to the support 12 or to the formwork, not shown.
  • a third embodiment of the reinforcement mat is shown in plan view in FIG. 8, in side view in FIG. 9 and in side view in FIG. 10 and in front view in FIG. 11. While the distribution of the welded crossing points corresponds to that in FIG. 1, the positions of the bars 4, 4 ', 5, 5' are changed.
  • the cross bars 4, 4 ' run in this embodiment in the same plane, while the longitudinal bars 5 below, the longitudinal bars 5', which form the separated pieces 7, are arranged above the cross bars 4, 4 '.
  • the links 8 can be arranged the same as in Fig. 1.
  • the other arrangement shown makes this reinforcement mat particularly suitable for single fields, since the raised mat part does not extend over the mat edge in the longitudinal direction direction protrudes.
  • the links 8 are arranged in this embodiment on the longitudinal rods 5 and the separated pieces 7, so that the movable mat part 9 moves laterally in the direction of arrow f (FIG. 11).
  • the reinforcement mat has a small width and the ends 15 of the cross bars 4 remaining in the plane of the mat are bent over, so that each subsequent one can be hooked into the one already laid during laying.
  • each movable mat part 9 consists only of a longitudinal bar 5 'as a separated piece 7 and the transverse bars 4' as separated pieces 14.
  • the links 8 are in turn arranged on the transverse bars 4 and the separated pieces 14.
  • the mat of this embodiment therefore has two first mat areas 1, in each of which additional rods 6 are arranged.
  • a further embodiment is shown, in which the movable mat part 9 consists of separated pieces 7 and cross bars 4 ', the link 8 continue the cross bars 4' so that together they form a bow-shaped element.
  • the links 8 can, as shown, be fastened in the fixed mat part 10 to the longitudinal bars 5 or also to the cross bars 4.
  • the reinforcement mat according to FIG. 15 has links 8 connected to the longitudinal bars 5 and the separated pieces 7. When pulling up in the direction of arrow f, these were twisted and bent.
  • the links 8 can be welded to the rods, in particular in this embodiment, and may have predetermined or aforementioned bending points.
  • 16 shows a similar embodiment with welded links 8, which in this case represent crossbars 4 'which are separate pieces 14.
  • the handlebars 8 therefore run in a grid pattern in this embodiment.
  • This version is advantageous in that no handlebars have to be additionally introduced into the production system and connected to the reinforcing bars during the manufacture of the mat.
  • it can have the disadvantage that the upward bending can be difficult, particularly with cross bars of larger diameter.
  • the reinforcement bars 4 ', 5' are arranged outside the grid as additional reinforcement bars, the intersection points 3 between the bars 4, 5 'and 4', 5 not being welded here, too.
  • the links 8 (or 8 'in FIG. 20) in turn engage in two mat parts 9, 10 on different mutually parallel reinforcing bars 4, 4' which lie in the same plane, while the longitudinal bars 5, 5 'are arranged below or above them are.
  • the version according to FIG. 17 is again particularly suitable for use in continuous fields, since the raised movable mat parts protrude on the edge and the mat parts of two mats that are lined up in a row overlap partially.
  • the handlebars 8 can be straight pieces of bar, but it can, as shown in Figs. 20 and 21, be used in the transport and laying state approximately U-shaped bent anchor 8 ', so that they open when pulled up and allow the mobility of the mat part 9 in two directions according to the arrows f '.
  • Reinforcement meshes of this type can be used above all for individual fields, since the movement can also only take place vertically.
  • the reinforcement mats according to the invention can be produced in the same way as ordinary mats, additional work steps being required for the supply of the reinforcement bars 4 ', 5' or the separation of the pieces 7, 14 and possibly for the supply and attachment of the handlebars 8, 8 '.
  • the reinforcement mats according to the invention only take up the same space as normal reinforcement mats and can therefore be stacked and transported with the same space requirement as ordinary mats.
  • the creation of the negative reinforcement in each support area by simply pulling up the movable mat parts leads to considerable labor and time savings without difficulties or additional measures being required. 1 to 16, reinforcing steel is also saved at the same time.
  • the mat parts 9 generally move parallel to the mat plane, but inclination can also be achieved by using unequal links or their non-parallel movement.
  • connection between the links 8, 8 'and the bars 4, 4' can be made in any way. They can be welded, soldered, rusted or the like. They can also be provided with eyelets or hooks, whereby they enclose the bars 4, 4 'with rotational resistance in order to remain in their raised position. If the handlebars are also made of reinforcing steel, they can also be used to cover shear stresses.
  • the reinforcement mats according to the invention can have any sizes, the mats being provided with one or more movable mat parts in each support area.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
  • Wire Processing (AREA)
EP79900574A 1978-06-21 1980-01-29 Bewehrungsmatte Expired EP0016008B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT4506/78 1978-06-21
AT450678A AT354028B (de) 1978-06-21 1978-06-21 Bewehrungsmatte
AT277279A AT360214B (de) 1979-04-12 1979-04-12 Bewehrungsmatte
AT2772/79 1979-04-12

Publications (2)

Publication Number Publication Date
EP0016008A1 EP0016008A1 (de) 1980-10-01
EP0016008B1 true EP0016008B1 (de) 1983-10-26

Family

ID=25599053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79900574A Expired EP0016008B1 (de) 1978-06-21 1980-01-29 Bewehrungsmatte

Country Status (6)

Country Link
EP (1) EP0016008B1 (it)
JP (1) JPS55500713A (it)
CH (1) CH644425A5 (it)
DE (2) DE2966345D1 (it)
IT (1) IT1121862B (it)
WO (1) WO1980000090A1 (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT405663B (de) * 1991-03-22 1999-10-25 Wendl Dipl Ing Erwin Verfahren zur herstellung eines streifenförmigen gitterelements
CN112475721B (zh) * 2020-11-16 2022-07-22 江苏科技大学 一种非圆形横截面钢筋骨架滚焊机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US902335A (en) * 1907-12-09 1908-10-27 Bridgeport Chain Company Reinforce for concrete structures.
CH335840A (de) * 1954-12-20 1959-01-31 Evg Entwicklung Verwert Ges Geschweisstes Bewehrungsnetz für Stahlbetonkonstruktionen
FR1358658A (fr) * 1963-03-22 1964-04-17 Grillage d'armature formé de traverses et de longerons
DE1484254A1 (de) * 1964-12-07 1969-01-16 Hufnagl Walter Bewehrungsmatte

Also Published As

Publication number Publication date
DE2966345D1 (en) 1983-12-01
CH644425A5 (de) 1984-07-31
DE7936811U1 (de) 1980-08-21
IT7923748A0 (it) 1979-06-20
EP0016008A1 (de) 1980-10-01
JPS55500713A (it) 1980-10-02
IT1121862B (it) 1986-04-23
WO1980000090A1 (en) 1980-01-24

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