EP0244495A1 - Couvre-joint dans des chaussées, en particulier pour tabliers de pont - Google Patents

Couvre-joint dans des chaussées, en particulier pour tabliers de pont Download PDF

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Publication number
EP0244495A1
EP0244495A1 EP86106144A EP86106144A EP0244495A1 EP 0244495 A1 EP0244495 A1 EP 0244495A1 EP 86106144 A EP86106144 A EP 86106144A EP 86106144 A EP86106144 A EP 86106144A EP 0244495 A1 EP0244495 A1 EP 0244495A1
Authority
EP
European Patent Office
Prior art keywords
plate
notch
joint
edge
cut
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.)
Withdrawn
Application number
EP86106144A
Other languages
German (de)
English (en)
Inventor
Reinold Huber
Waldemar Köster
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.)
Kober AG Glarus
Koerber AG
Original Assignee
Kober AG Glarus
Koerber AG
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 to DE19858508033 priority Critical patent/DE8508033U1/de
Application filed by Kober AG Glarus, Koerber AG filed Critical Kober AG Glarus
Priority to EP86106144A priority patent/EP0244495A1/fr
Publication of EP0244495A1 publication Critical patent/EP0244495A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/06—Arrangement, construction or bridging of expansion joints

Definitions

  • the invention relates to a joint cover adjacent to the road surface in traffic routes, in particular of bridges, with an elastomeric plate bridging the joint, the longitudinal edges of which are each firmly connected to the associated joint edge, the plate having at least one notch on its underside.
  • Such a known joint cover (US Pat. No. 3,324,774) has an elastomeric plate consisting of inclined ribs with webs which are bent downwards and are bent between them at a middle height of the ribs.
  • the plate has on its underside border notches adjacent to the longitudinal edges and, because of the oblique ribs, further notches which adjoin the webs mentioned.
  • Both the edge notches and the further notches are designed in the form of grooves which are open at the bottom and which remain open even under the action of horizontal compressive forces while the webs bulge downwards.
  • Another known joint cover (US Pat. No. 3,316,574) has an elastomeric plate with a closed surface, without notches on its underside, but with cavities for material displacement in the event of compression deformation. Under the influence of horizontal compressive forces, the plate tends to bend downwards, caused by metal plates vulcanized in the middle of the plate near its underside or by cavities in the middle of the plate, which are arranged off-center, namely offset to the top of the plate.
  • the elastomeric plate is not intended to be subjected to tension. As a result of the explained design of the plate cross section, under the action of tensile forces the plate would warp upwards, i.e. the plate would lift off its surface.
  • joint covers are known (French patent specification 2 116 665) in which the joint is bridged by an elastomeric folding profile which is firmly connected at the longitudinal edges to the associated joint edge.
  • folding profiles which are notched alternately from above and from below, with the formation of their folding profile, can only withstand limited vertical loads. When they are deformed, the shape change forces of the folding mechanism are in the foreground, with other force mechanisms prevailing compared to the plate-shaped joint covers explained above.
  • joint covers are known (DE-GM 6 609 118) in which an elastomeric plate with a closed surface is connected in the middle to a metal strip.
  • the metal strip has edges that are curved upwards, which engage in grooves on the underside of the elastomeric plates and stiffen the plate in the lower region under the action of horizontal compressive forces. This results in a deflection of the plate downward when the pressure is deformed, so that it rests on the base. A strain on train is not intended.
  • the present invention has for its object to achieve a non-positive fit of the elastomeric plate on a base with a joint cover of the type mentioned both when Switzerlandals and compression deformation of the plate. i.e. when both horizontal tensile forces and horizontal compressive forces act on the plate edges, the plate should tend to deflect downwards.
  • the notch is designed as a cut notch, which is almost or completely closed in the de-energized state of the plate, so that the entire plate cross-section acts in the case of compression deformations, while the cut notch expands in the case of tensile deformations, in which essentially only the plate cross section remaining above the cut notch acts.
  • cut notch is to be understood to mean such a notch which, when de-energized, allows the surfaces delimiting the notch to lie against one another, similar to a narrow incision in the underside of the plate.
  • the plate cross-section can change depending on the type of stress, similar to a "system of variable structure" known in the art.
  • the plate When deformed, the plate acts like a closed plate without a notch; in the event of tensile deformation, the cut notch opens and only the remaining plate cross-section is effective.
  • the plate has edge notches adjacent to the longitudinal edges and at least one further notch in a known manner. If this additional notch is designed as a cut notch, the effect of the edge notches means that the plate cross-section effective for the reaction to compressive forces, measured from the road surface, extends further downwards than the edge height of the plate connected to the joint edge and vice versa, the plate cross-section effective for the reaction to tensile forces, on the other hand, extends less far downwards.
  • the known edge notches are that the center of gravity of the plate center is lower than that at the edge when the joint cover is subjected to pressure, the improvement according to the invention being that the center of gravity of the plate center is higher than that at the edge when there is tensile stress.
  • the decisive factor is the changing position of the center of gravity depending on the type of load, corresponding to the effective cross-section in the center of the board (parallel to the longitudinal direction of the joint).
  • the edge notches and at least one cut notch ensure that both with horizontal tensile forces and with horizontal compressive forces, a bending moment is always generated in the elastomeric plate, which has the tendency to press the plate downwards. This makes it possible to prevent the plate from bulging under pressure and to lift it off its base under tension. By ensuring that the panel lies flat on the base, the adverse impact effects of vehicles rolling over it are avoided, which gives the joint cover an overall longer service life.
  • the entire or part of the elastomeric plate preferably lies on a rigid, plate-shaped base that bridges the joint. But it can also rest directly on the joint edges without such a base being provided. This option is particularly suitable for narrow gap gaps.
  • An essential embodiment of the invention is that the cut notch merges into a fillet or into a cavity at its inner end.
  • the slot-shaped opening of the cavity closes during the compression deformation and the overall cross-section of the elastomeric plate acts, the center line of which, depending on the position and shape of the cavity, remains approximately in the cross-sectional center and thus deeper lies as the edge line of gravity displaced upwards by the edge notches, which corresponds to the location of the force application of the horizontal forces.
  • the result is that when the plate is deformed, it bends downwards.
  • the cut notch connected to the cavity opens and only the plate cross section remaining above the cavity acts for the tensile reaction forces, the center of gravity of which still lies above the boundary line of gravity. The result in the case of tensile deformation is therefore also a downward bend.
  • the cavity and edge notches provide the necessary space for material displacement without significantly increasing the plate thickness.
  • the transverse contraction is greatly reduced by the cavity due to the reduced tensile cross section.
  • the cavity has the advantage of preventing notch cracks or stress cracks in the area of the plate-inner end of the cut notch. For this purpose, however, a small cavity in the sense of rounding off the end of the cut notch is sufficient, the depth of which, including the cavity, is preferably between a third and a half of the plate thickness.
  • edge notches penetrate less deeply into the plate than the cut notch. This is the only way to ensure that the center of gravity of the remaining upper partial cross section of the plate is higher than the center of gravity in the edge area of the plate.
  • closed hollow chambers at the location of the edge notches are also suitable as technical equivalents for the edge notches.
  • Another possibility consists in stiffening edge notches or hollow chambers in the area of the underside of the plate, instead stiffening the overlying edge area thereof by appropriate inserts.
  • the elastomeric plate with a plurality of cut notches, with or without cavities. With wider joints, at least two notches will be arranged.
  • the shape of the cut notches - whether straight, corrugated or serrated - their direction to the plate surface and their arrangement to the cavities can influence the deformation pattern of the plate.
  • the position of the slot-shaped part of the cut notches with respect to the cavities connected to them can also be off-center.
  • the joint 1 to 3 each show, in different joint positions, a vertical cross section through a joint cover, the cutting plane running transversely to the longitudinal direction of the joint.
  • the joint 1 is bridged by an elastomeric plate 2, the material preferably being a highly elastic material with a low tendency to creep, for example chloroprene.
  • the elastomeric plate 2 is vulcanized with its side faces 3 to an edge angle 4.
  • the edge angles 4 are each anchored in the concrete of the associated joint edge 6, 7 by means of bolts, the axes of which are indicated by the lines 5.
  • the elastomeric plate 2 On the underside of its longitudinal edges 9, the elastomeric plate 2 each has an edge notch 10.
  • the rounded end of the edge notches 10, which is inside the plate, is at a distance a below the road surface 11.
  • the edge line of gravity r runs at a medium height at horizontal compressive forces D or tensile forces Z.
  • Distance a (for simplification it is always assumed here that the joint cross-section shown is constant in the longitudinal direction of the joint).
  • two cut notches 13 are also provided between the two edge notches 10. To avoid notch cracks, the cut notches 13 each have fillets 14 on their inner end. The cut notches 13 are cut deeper into the elastomeric plate 2 than the edge notches 10. Depending on their depth t, there is still a distance h from the road surface 11 which corresponds to the difference between the plate thickness s and the depth t of the cut notches 14.
  • the cross section of the elastomeric plate 2 which is effective for the reaction to horizontal compressive forces D, corresponds to its total thickness s, as shown in FIG. 2, since the cut notches 13 close under pressure. Accordingly, the center of gravity d runs at pressure reaction forces DR in the middle height of the plate thickness s.
  • the effective cross section for the reaction of the elastomeric plate 2 to tensile forces Z corresponds to. Fig. 3 the distance h, since there is a tensile load open the notches 13. Thus, the center of gravity z tensile reaction forces ZR runs in the middle of the distance h.
  • the elastomeric plate 2 can either be prefabricated, i.e. installed together with the edge angles 4 in the joint area and then connected to the road surface 8; it can also be cast on site, whereby the edge notches 10 can be formed by foam strips inserted into the recess for the elastomeric plate 2.
  • the cut notches 13 with fillets 14 can be produced by means of a lost formwork of approximately T-shaped cross-section rounded on the inside as shown in FIG. 1.
  • Fig. 3 is the bottom 12 of the elastomeric plate 2 instead of on the gap 1 bridging base 15 made of rigid material such as steel or hard elastic plastic, so that the deformation of the cut notches 13 and the edge notches 10 is not hindered. While the edge notches 10 always remain open - according to the narrow joint position. Fig. 2 reduced, in the wide joint position. Fig. 3 enlarged accordingly - are the cut notches 13 under pressure load acc. Fig. 2 completely closed and under tensile load acc. Fig. 3 opened accordingly. When de-energized according to Fig. 1, the cut notches 13 are just closed, without the fillet 14 being reduced.
  • FIGS. 4 and 5 each show, in a vertical section transverse to the joint 1, a joint cover with only one notch 13, which merges into a particularly large cavity 16.
  • the elastomeric plate 2 rests directly on the joint edges 6, 7.
  • the joint cover is particularly suitable for narrow joints. 4 shows the pressure force D and the pressure reaction force DR on the right half, the tensile force Z and the tensile reaction force ZR on the left half. It can easily be seen that the lines of gravity for the force attack run in the same way as for the exemplary embodiment according to FIG. specify Figures 1 to 3. These relationships result from the arrangement of a cut notch 13 and the two edge notches 10.
  • the center of gravity for the tensile force Z or the compressive force D in the edge region of the plate 2 can also be shifted to the upper plate region in another way.
  • Correspondingly arranged hollow chambers have a similar effect as the edge notches 10.
  • Such a hollow chamber 17 is shown in the left half of FIG. 5.
  • the center of gravity is also shifted into the upper plate region by the fact that it is reinforced by additional measures, for example by a metal insert 18 shown in section in the right half of FIG. 5 4 and 5, for the sake of simplifying the drawing, the hatching of the elastomeric plate 2, which is shown in section, omitted.
  • the elastomeric plate 2 is vulcanized with its lateral edges to the edge angles 4 anchored in the joint edges 6, 7.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
EP86106144A 1986-05-06 1986-05-06 Couvre-joint dans des chaussées, en particulier pour tabliers de pont Withdrawn EP0244495A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19858508033 DE8508033U1 (fr) 1986-05-06 1985-03-18
EP86106144A EP0244495A1 (fr) 1986-05-06 1986-05-06 Couvre-joint dans des chaussées, en particulier pour tabliers de pont

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86106144A EP0244495A1 (fr) 1986-05-06 1986-05-06 Couvre-joint dans des chaussées, en particulier pour tabliers de pont

Publications (1)

Publication Number Publication Date
EP0244495A1 true EP0244495A1 (fr) 1987-11-11

Family

ID=8195110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86106144A Withdrawn EP0244495A1 (fr) 1986-05-06 1986-05-06 Couvre-joint dans des chaussées, en particulier pour tabliers de pont

Country Status (2)

Country Link
EP (1) EP0244495A1 (fr)
DE (1) DE8508033U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11459746B1 (en) * 2021-02-02 2022-10-04 Schul International Co., Llc Foam-based seal for angular expansion joint segments

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108487053A (zh) * 2018-03-27 2018-09-04 周汉林 一种弹性减震器自动闭合的桥梁减震伸缩缝装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3316574A (en) * 1965-07-28 1967-05-02 Pare Robert Lee Road expansion joint
US3324774A (en) * 1965-04-21 1967-06-13 Gomma Antivibranti Applic Expansion joint for road sections
DE6609118U (de) * 1967-03-03 1972-02-17 Sequaris Etienne Abdeckvorrichtung fuer dehnungsfugen an bruecken und anderen ingenieurbauwerken.
FR2116665A5 (fr) * 1970-12-02 1972-07-21 Ceintrey M
GB1526194A (en) * 1975-10-02 1978-09-27 Tippett S Expansion joints

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3324774A (en) * 1965-04-21 1967-06-13 Gomma Antivibranti Applic Expansion joint for road sections
US3316574A (en) * 1965-07-28 1967-05-02 Pare Robert Lee Road expansion joint
DE6609118U (de) * 1967-03-03 1972-02-17 Sequaris Etienne Abdeckvorrichtung fuer dehnungsfugen an bruecken und anderen ingenieurbauwerken.
FR2116665A5 (fr) * 1970-12-02 1972-07-21 Ceintrey M
GB1526194A (en) * 1975-10-02 1978-09-27 Tippett S Expansion joints

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11459746B1 (en) * 2021-02-02 2022-10-04 Schul International Co., Llc Foam-based seal for angular expansion joint segments

Also Published As

Publication number Publication date
DE8508033U1 (fr) 1987-07-02

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Inventor name: HUBER, REINOLD

Inventor name: KOESTER, WALDEMAR