Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
  • E01C11/00—Details of pavings
  • E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
  • E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
  • E01C11/14—Dowel assembly ; Design or construction of reinforcements in the area of joints
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
  • E04B1/38—Connections for building structures in general
  • E04B1/48—Dowels, i.e. members adapted to penetrate the surfaces of two parts and to take the shear stresses
  • E04B1/483—Shear dowels to be embedded in concrete

Definitions

• the present invention relates to a transverse force mandrel bearing for transmitting dynamic loads, consisting of a transverse force mandrel, a transverse force dome bearing sleeve and at least one bearing cage and a bearing basket holding the transverse force mandrel.
• Shear force mandrels are connecting and pressure distribution elements for two concrete parts running in the same plane, which are separated from each other by a joint.
• a transverse force mandrel bearing which, as usual, consists of a transverse force mandrel, a transverse force bearing sleeve and a bearing basket holding the bearing sleeve.
• end plates are arranged on the storage basket, which only serve to fix the transverse force dome bearing sleeves to a casing during the production of the concrete slab.
• the storage basket consists of a number of closed loops made of reinforcing steel wires. The loops lie in planes parallel to the direction of the joint.
• EP-A-0 '032' 105 shows a system which presumably could also cope with dynamic loads in relation to the shear force mandrel bearing.
• the storage baskets are formed here by cups that are more or less closed on all sides. The permissible pressure limit of the concrete is also exceeded within the cup, but the force is transferred to the cup and the concrete running above the cup is relieved to the extent that the permissible pressure limit mcnt is exceeded here more.
• EP-A-0 '773' 324 A further development is shown in EP-A-0 '773' 324. Again, the problem of the static load and in particular the force distribution to avoid exceeding the admissible pressure limit of the concrete is also considered.
• an end plate facing the joint is also provided, with a plate protruding into the structure being arranged on each end plate. This plate lies on the side of the mandrel respectively the sleeve which, when the static reaction forces are transmitted to the corresponding component, lies opposite the side of the mandrel or the sleeve which is under pressure.
• shear force mandrels can be produced which have a core which is drawn in without play and a jacket which projects above this core and whose ends are protected against corrosion by means of plastic plugs.
• the focus here is on the one hand to produce shear force mandrels which preferably consist predominantly of relatively inexpensive structural steel and have a stainless steel jacket tube.
• Such transverse force mandrels have been well preserved for the transmission of static loads. They can also be manufactured extremely precisely and are perfectly protected against corrosion.
• the invention furthermore shows a new method for producing transverse force mandrels, since the method mentioned at the outset, which is already protected by the applicant, is less suitable, particularly in the case of more than two layers.
• the overall concept consists of a shear force mandrel bearing basket with the Features of claim 1 and a multi-layer transverse force mandrel and their common arrangement of essential importance. For the dynamic loads, these two elements must be coordinated.
• Figure la is a vertical longitudinal section perpendicular to the direction of the joint and
• Figure lb is a plan view of the same transverse force mandrel bearing with a view of the rear of an end plate in which the transverse force dome bearing sleeve is also held.
• Figure lc shows the cross section of the transverse force mandrel cut along the line A-A.
• Figure 2a shows the same view as Figure la of a second embodiment
• FIG. 2b shows the same view as in FIG. 1b of the embodiment according to FIG. 2a.
• Figure 2c shows a cross section through the transverse force mandrel in Figure 2a along the line B-B.
• FIG. 3a shows a third embodiment of a transverse force mandrel bearing, again as in FIGS.
• FIG. 3b shows the rear view as in FIG. 1b corresponding to the embodiment according to FIG. 3a.
• FIG. 3c shows a cross section of the transverse force mandrel as used in FIG. 3a, cut along the line CC.
• Figure 4a is a fourth embodiment of the subject of the invention in the same representation as shown in Figure la and
• FIG. 4b shows a corresponding view as in FIG. 1b of the embodiment according to FIG. 4a, while
• Figure 4c shows a cross section through the transverse force mandrel as used in Figure 4a along the line D-D.
• the two components under dynamic load which are connected to each other by means of transverse force mandrel bearings, are marked here with Bi and B 2 .
• Bi and B 2 the two components under dynamic load, which are connected to each other by means of transverse force mandrel bearings.
• the elements are embedded in the concrete.
• the transverse force mandrel mounting is designed symmetrically with respect to the joint F to be bridged.
• the shear force mandrel bearing consists, as usual, of the shear force mandrel 1, a shear force dome bearing sleeve 2 and bearing cages 3.
• the storage baskets 3 consist of at least two elements, namely an end plate 4 and a carrying belt-like loop 5. It is essential that the carrying belt-like loop 5 together with the end plate 4 is a closed one Force system forms.
• the end plate 4 is embedded in the concrete flush with the end surface of the respective concrete part B 1, B 2 directed towards the joint.
• the riser-like loops are arranged so that they are able to transfer the alternating loads that occur on the transverse force mandrel to the end plate. This is achieved by the strap-like design of the loops 5.
• 5 m of different design forms can be formed like a carrying strap-like loops. They can have exactly the same width as the end plates 4 or be narrower or wider than this. In the embodiment according to FIGS.
• the riser-like loop 5 has the same width as the end plate 4, while the other three embodiments represent variants in which the riser-like loops are narrower than the end plate 4.
• the transverse force mandrel 1 or the transverse force dome bearing sleeve 2 can pass through the carrying belt-like loop 5, as shown by the embodiments according to FIGS. 1 and 4, or they can be encompassed by these loops 5, as shown by the embodiment according to FIG. 2.
• the loops 5 have shoulder strap-like functions. This becomes clearer in the embodiment according to FIG. 3.
• two carrying straps are used on each side, which together form a closed power system with the end plate 4.
• a shoulder strap-like loop 5 ′ which extends to below the transverse force dome bearing sleeve 2, engages at the upper end of the one end plate.
• these carrying belt-like loops run past the lateral force dome bearing sleeve 2 Loops 5 'and 5 "are connected to the transverse force mandrel 1 instead of the transverse force dome sleeve 2.
• the possible shapes of the shoulder strap-like loops 5 in the side view can be trapezoidal, for example, preferably choosing the shape of an isosceles trapezoid, the height of which can, however, be different, as is indicated by the dashed line in component B.
• the shape of the riser-like loops 5 can also have approximately the shape of a triangle, as shown in FIG. 2a. This For " ⁇ let's of course also be achieved if the transverse force dowel or the Querkraftdornlagerhu-.se 2 5 enforce the only straplike loop each. But Letzlicn may be semicircular in shape, the straplike loop, as shown in FIGS ⁇ r 4a.
• the riser-like loops are preferably with ventilation holes or ventilation holes 6 m of any crosses and any number, as shown by the different embodiments.
• the multi-layer design of the transverse force mandrel 1 is absolutely imperative.
• the physical properties can only be achieved thanks to the multi-layer design of the shear force mandrels, namely the required load-bearing capacity combined with the high compressive strength, resistance to scoring and elasticity values.
• Shear force gates with a monoferritic cross-section i.e. Shear force gates, which consist entirely of a metal or a metal alloy and a piece, have not produced these desired pairings of the physical properties. This finding is extremely surprising.
• the shear force mandrels according to the invention can also be multi-layered with all the known cross-sectional shapes.
• the most common cross-sectional shapes are still present, such as, in particular, cylindrical shear force mandrels and shear force mandrels with a rectangular one or square cross section.
• shear force mandrels ⁇ r_t a rectangular or square cross-section pr ⁇ nz ⁇ p ⁇ e_l can be formed from a stratification of at least two plate-shaped bars, but usually three or more layers will be provided.
• the outermost layer can also be designed as an enveloping jacket.
• the connection between the plate-shaped bars to form a transverse force mandrel can of course be of the most varied nature.
• positive and / or non-positive connections are also possible. This can result in packets of plates, similar to multilayer leaf springs, whereby the individual bearings can be positively connected to one another, for example by rivets or pins penetrating them, or have side notches in order to finally realize a connection by strapping.
• a cylindrically designed transverse force mandrel can also be produced from more than two layers.
• the method known from EP-A-0 '765' 967 is less suitable for this purpose.
• a particularly interesting process for the production of such cross-shaft mandrels is that a first tube is pushed over a central cylindrical rod, which surrounds this rod with a certain amount of play and then hammers its diameter onto the core without play using a hammer process. Surprisingly, an extremely precise rod can be achieved here, the non-positive connection being excellent.
• the core of the shear force mandrel is a rod.
• the core is an innermost tube and several tubes are pulled or hammered over it in several layers.
• the cavity of the innermost tube can also be filled with a nauseating mass for physical reasons or as corrosion protection.
• the hardness of the multi-layer dome between the individual layers In order to achieve the dynamic resilience required for the mandrel, it is necessary to vary the hardness of the multi-layer dome between the individual layers. It is possible to make the hardness from the outside to the inside increasing and decreasing. For various reasons, it is particularly advantageous to increasingly choose the hard one from the outside in.
• the core can be a rod or a single or multi-layer tube. The material compaction achieved with the hammer process results in a physically more favorable product than a multi-layer mandrel formed by the thermal process.

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• Architecture (AREA)
• Engineering & Computer Science (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
• Joining Of Building Structures In Genera (AREA)
• Hydraulic Turbines (AREA)
• Road Paving Structures (AREA)
• Pivots And Pivotal Connections (AREA)
• Mechanical Treatment Of Semiconductor (AREA)
• Gripping On Spindles (AREA)
• Buildings Adapted To Withstand Abnormal External Influences (AREA)
• Battery Electrode And Active Subsutance (AREA)

Applications Claiming Priority (3)

Publications (2)

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• 1997
  • 1997-11-17 CH CH02648/97A patent/CH692991A5/de not_active IP Right Cessation
• 1998
  • 1998-11-16 JP JP2000521288A patent/JP2001523778A/ja active Pending
  • 1998-11-16 AT AT98952491T patent/ATE299974T1/de active
  • 1998-11-16 DE DE59812946T patent/DE59812946D1/de not_active Expired - Lifetime
  • 1998-11-16 US US09/554,643 patent/US6471441B1/en not_active Expired - Fee Related
  • 1998-11-16 EP EP98952491A patent/EP1032737B1/fr not_active Expired - Lifetime
  • 1998-11-16 WO PCT/CH1998/000493 patent/WO1999025934A1/fr active IP Right Grant
  • 1998-11-16 AU AU10189/99A patent/AU1018999A/en not_active Abandoned

Non-Patent Citations (1)

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