Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G23/00—Working measures on existing buildings
  • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
  • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G23/00—Working measures on existing buildings
  • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
  • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
  • E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G23/00—Working measures on existing buildings
  • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
  • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
  • E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
  • E04G2023/0255—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements whereby the fiber reinforced plastic elements are stressed
  • E04G2023/0259—Devices specifically adapted to stress the fiber reinforced plastic elements
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
  • E04G23/00—Working measures on existing buildings
  • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
  • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
  • E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
  • E04G2023/0262—Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off

Definitions

• the present invention relates to an arrangement for reinforcement on a longitudinally extended and / or flat structure or structural part by means of at least one lamella-like reinforcement arranged on the structure or structural part or masonry, a structural part provided for carrier functions, reinforced with an arrangement, a masonry with an arrangement and a method for reinforcing a building or part of a building.
• shear cracks that occur lead to an offset on the reinforced surface, which generally results in the reinforcing lamellas being peeled off or detached.
• the formation of shear cracks is thus also an essential dimensioning criterion, both with regard to the load-bearing capacity of the unreinforced structural part and also with a possible risk of the subsequently arranged reinforcement lamellae becoming detached.
• the object is achieved by means of an arrangement according to the wording according to claim 1.
• An arrangement is proposed for reinforcement on a longitudinally extended and / or flat structure or structural part by means of at least one lamella-like reinforcement arranged on the structure or structural part in a slack or prestressed manner, wherein according to the invention the at least one slat used for reinforcement is inserted into the structure or at least at one end The building part is anchored running into it.
• At least one slat end preferably at least almost continuously bent, be deflected into the building or masonry in order to be anchored in the building or masonry.
• the arrangement or anchoring of a slat end, which projects into the structure or masonry, proposed according to the invention, is of course suitable for any known reinforcing slats, such as steel slats, glass fiber or carbon fiber reinforced slats, for example produced with epoxy resins or polyester ⁇ resins, extruded reinforcing lamellae from a thermoplastic, etc.
• the at least one end of the reinforcing lamella, or both ends of the reinforcing lamella, are preferably embedded in a continuously curved manner running into the building, wherein the inserted end can each be covered by concrete and / or a polymer-reinforced material, such as, in particular, an adhesive.
• a polymer-reinforced material such as, in particular, an adhesive.
• an epoxy mortar or an epoxy resin reinforced concrete polymer in order to anchor or cover the end of the lamella embedded in the masonry or concrete.
• the slat end protruding into the masonry or concrete structure is additionally, as suggested in WO93 / 20296, with a plate, lamella to press len- or belt-like element against the building or the building part in order to achieve a further reinforcement against shear forces.
• a wedge covering the slat end is also suitable for this purpose.
• the arrangement proposed according to the invention is suitable for a building or a building part provided for supporting functions, which is reinforced with one or more reinforcing lamellae against shear forces occurring. But also for the reinforcement of any building or masonry by means of one or more reinforcing slats, it is advantageous to anchor the slat ends, as proposed according to the invention, running into the building or part of the building or masonry.
• FIG. 1 schematically shows in longitudinal section a reinforced concrete bridge by means of a reinforcing lamella
• FIG. 2 in side view shows a masonry or a push wall reinforced by means of reinforcing lamellae, for example suitable for a seismically endangered area
• 5a is a top view of a test arrangement with and 5b the concrete beam from FIG. 4 with a conventionally glued-on reinforcement lamella,
• FIGS. 4 and 6b and 5 shows a test arrangement similar to that in FIGS. 4 and 6b and 5, but with an extended slat end
• FIGS. 7a again the same experimental arrangement as in FIGS. 7b and 7c, FIGS. 4 to 6, but anchored with a slat end, as suggested according to the invention, running into the concrete beam, 8 shows, in diagram form, the deflection in the three test arrangements according to FIGS. 5, 6 and 7,
• 10a shows the elongation at the slat end at different and 10b force levels and in the middle of the support in the test arrangement according to FIG. 6,
• 11a shows the elongation at the slat end at different and 11b force levels and in the center of the beam in the experimental arrangement according to the invention
• FIG. 12a shows a longitudinal section and a top view schematically
• FIG. 12b shows a method for anchoring a slat end according to the invention
• 13a shows a longitudinal section and a top view of the arrangement of a and 13b end anchor wedge on a slat end anchored according to the invention
• Fig. 1 is a schematic longitudinal section of a reinforced concrete bridge ⁇ 1 shown, comprising a concrete slab 3, which is supported or held by two pillars 5 on the respective supports 7.
• this concrete bridge was reinforced by means of a reinforcing lamella 10 arranged between the two supports 7.
• the reinforcing lamella 10 extends between the two supports 7 and is glued over its entire length, for example with an epoxy resin adhesive, the lamella also being glued to the concrete slab 3 in the area A ', as is customary in the conventional way.
• the masonry 13 is reinforced with laterally glued-on reinforcement lamellae 20, the lamellae usually being anchored in the end in the concrete slabs arranged below and above the thrust wall 13 or in the floor and ceiling slabs 15 and 17. In this case, for example in area A ", the slat end is led into the concrete slab 17 in order to be anchored therein.
• the generation of this anchoring is complex and requires a great deal of work.
• the lamella end 22 of the reinforcement lamella 10 or 20 extends into the concrete slab 3 or the masonry 13, and is accordingly covered in this area by concrete or cement mortar.
• a polymer adhesive such as an epoxy resin mortar or a polyurethane or silicone formulation.
• the optimal choice of the material to be used depends, for example, on the material from which the reinforcing lamella is made.
• the insertion of the slat end into the building or into the masonry which is shown schematically in FIG. 3, can achieve a decisive shear reinforcement on the building, even if the slat length is not as usual is chosen from support to support or from concrete slab to concrete slab.
• the experimental arrangement described below is intended to show that with the same slat length, an increase in the reinforcement can be achieved if the slat end (s) are anchored in the building or part of the building or masonry.
• FIG. 4a shows a longitudinal section of a concrete girder 3 analogous to that of FIG. 1, which is used for the following test arrangements.
• the concrete beam 3 rests on the supports 7 and comprises a steel reinforcement 4.
• the concrete support 3 has been reinforced on its lower side 8 by means of a CFRP lamella 10, one end 11 of the lamella practically extending to the corresponding support 7 1 , whilst outputting the opposed fins being spaced ⁇ end 13 from the other supports 7 ".
• Fig. 4b shows the concrete beam of Fig. 4a in cross-section.
• the experimental arrangement shown in FIG. 5a, shows the reinforcement lamella in a top view of the concrete beam 3 to be reinforced, the one lamella end 11 extending up to the support 7 ', while the opposite lamella end 13' extends a distance above the corresponding one 5a extends.
• the dimensioning of the test arrangement is shown in the illustration in FIG. 5a, the slat end 13 'correspondingly extending 20 cm beyond the force introduction point 15 ".
• 5b schematically shows the measuring points 29 which are provided on the lamella end 13 'for determining the forces or the occurring expansion.
• Point 24 in Fig. 5a marks the center of the concrete beam 3, where a measuring point is also arranged.
• a pressure plate not shown, is also provided.
• the slat end 13 ' is anchored in a conventional manner to the underside of the concrete beam.
• 6a and 6b show an analog test arrangement, however the slat end 13 "extends 30 cm beyond the corresponding force introduction point 15" and thus extends closer to the corresponding support 7 ". Again in the area of the end are 13 "Several measuring points are provided, as well as in the middle at point 24 on the concrete beam 3.
• FIG. 7 A test arrangement is shown in FIG. 7, the slat end 13 ′ ′′ now running into the structural part is anchored, which is shown schematically in the longitudinal sectional view of FIG. 7c.
• the lamella end 13 '' again extends only 20 cm beyond the corresponding force introduction point 15 '', that is to say it is 10 cm more apart from the corresponding support 7 ", compared to the test arrangement according to FIGS. 6a and 6b.
• the anchoring of the The slat end 13 '" runs along a distance of 10 cm, the continuously curved end piece 13a'''' extending in the concrete beam 3 being schematically shown in longitudinal section in FIG. 7c.
• FIGS. 5, 6 and 7 now shows in diagram form the deflection of the test beams measured in the center of the beam with the three test arrangements used according to FIGS. 5, 6 and 7.
• the deflection ⁇ (mm) is shown as a function of the force (KN) introduced at the points 15, it being shown separately for the three test arrangements by the deflection.
• FIGS. 9, 10 and 11 each show the lamella expansions at the lamella end at different force levels for the three test arrangements of FIGS. 5, 6 and 7 in the corresponding FIG. A, and the elongation in the respective FIG. B in the middle of the beam.
• the maximum load and in particular the maximum slat expansion in the test arrangement according to the invention according to FIG. 7 could be significantly increased compared to the supports of test arrangements 5 and 6. 5 and 6 show similar behavior despite different anchoring lengths in the area of the ends 13 'and 13 ". Approximately the same strains are registered in the central area of the girder. Each time the flow load is reached, the lamellae shear off Slat end down.
• the blade of the carrier according to the present invention pre- ⁇ chosen arrangement in Fig. 7 is "embedded at one end 13 'in Be ⁇ tinge 3 and covered with adhesive 23.
• the maximum lamellae strains were compared with the above-be ⁇ signed attempts in connection with the 5 and 6. The behavior can probably be justified as follows:
• the adhesive on the lamella or a pressure wedge according to FIG. 3 or the following FIGS. 13a and b prevents the slat end from coming off prematurely, which is caused by the vertical tension component which is directed away from the carrier.
• FIGS. 12a and 12b schematically show a method of how the inventive anchoring of a reinforcing lamella 10 is possible in a relatively simple manner.
• it is not possible to grind, mill or grind into the structure so that, as shown in FIGS. 12a and 12b, it is now proposed that the end of the reinforcement lamella end 22 run into the structure by means of so-called stepped core bores to accomplish.
• the area of so-called core bores 31 is stepped into the concrete 3 to be reinforced by means of, for example, a conventional drilling machine, the first bore being only a small depth away from the slat end, while the last core bore 31 has a great depth in the area of the slat end.
• Such core bores can have, for example, a hole diameter of 10 or more cm, depending on how wide the reinforcement lamella 10 to be anchored is.
• FIGS. 13a and 13b Such an anchoring wedge is also shown in FIGS. 13a and 13b, with additional fastening means 33 now being arranged, which may be, for example, screws, bolts, loops, etc.
• additional fastening means 33 may be, for example, screws, bolts, loops, etc.
• FIG. 14a and 14b show a concrete structure 32, such as a supporting structure for galleries or parking halls, in which structure the ceiling plate 35 and the side wall 37 are connected to one another via a so-called haunch 39 in the corner area.
• the Un ⁇ underside of the ceiling is to reinforce 35 by means of a reinforcing plate 10
• Fig. 14a shows that anchoring the lamella end 13 in the area of the haunch is unfavorable because Melle upon the occurrence of tensile forces on the Verstärkungsla ⁇ 10, this is replaced in the corner area 36. For this reason, as shown in FIG.
• FIG. 15 finally shows a further structure arrangement, for example once again a supporting structure, comprising a concrete ceiling 41 and a partition wall or a longitudinal pillar 43, the ceiling 41 again being reinforced by means of a reinforcement lamella 10.
• a supporting structure comprising a concrete ceiling 41 and a partition wall or a longitudinal pillar 43, the ceiling 41 again being reinforced by means of a reinforcement lamella 10.
• the slat end 22 is anchored according to the invention running into the ceiling.
• the auxiliary line 53 shown in FIG. 15 shows the curve of the bending moment in relation to the building part or to the system center plane 47 running through the ceiling. This clearly shows the passage through a zero point at a distance x from the pillar 43 near the corner area 45 and a subsequent sharp increase.
• the reinforcing plate 10 as glued conventionally, would be anchored in the corner region 45, a collecting entste ⁇ Henden tension would ⁇ rich 45 possible only at a distance greater than x from Eckbe, whereby the risk of shearing of the sipe 10 of the concrete slab 41 is given.
• 1 to 15 serve only for a more detailed explanation and illustration of the idea according to the invention, and a terminal anchoring of reinforcing slats proposed according to the invention can of course be chosen in any desired manner.
• the material used for the reinforcing lamellas can also be any, for example a lamella made of sheet iron, steel, aluminum, a reinforced polymer, such as, in particular, GRP-reinforced epoxy resin, etc.
• Essential to the invention is the fact that a reinforcement lamella attached or attached to a structure or masonry is anchored at least with one end running into the structure or masonry, whether a reinforcement wedge is used or not is not primarily essential and depends on the Requirements and the location.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Structural Engineering (AREA)
• Working Measures On Existing Buildindgs (AREA)
• Bridges Or Land Bridges (AREA)
• Reinforcement Elements For Buildings (AREA)
• Details Of Garments (AREA)
• Orthopedics, Nursing, And Contraception (AREA)
• Table Devices Or Equipment (AREA)
• Reinforced Plastic Materials (AREA)

Applications Claiming Priority (3)

Publications (2)

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Country Status (9)

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• 1995
  • 1995-12-12 AU AU39771/95A patent/AU3977195A/en not_active Abandoned
  • 1995-12-12 EP EP95938340A patent/EP0803020B1/fr not_active Expired - Lifetime
  • 1995-12-12 ES ES95938340T patent/ES2122696T3/es not_active Expired - Lifetime
  • 1995-12-12 AT AT95938340T patent/ATE171240T1/de not_active IP Right Cessation
  • 1995-12-12 DK DK95938340T patent/DK0803020T3/da active
  • 1995-12-12 JP JP8521346A patent/JPH10512635A/ja not_active Ceased
  • 1995-12-12 US US08/860,596 patent/US5937606A/en not_active Expired - Fee Related
  • 1995-12-12 WO PCT/CH1995/000298 patent/WO1996021785A1/fr not_active Ceased
  • 1995-12-12 DE DE59503647T patent/DE59503647D1/de not_active Expired - Fee Related

Non-Patent Citations (1)

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