WO1997040241A1 - Reinforcing bar - Google Patents
Reinforcing bar Download PDFInfo
- Publication number
- WO1997040241A1 WO1997040241A1 PCT/CH1997/000139 CH9700139W WO9740241A1 WO 1997040241 A1 WO1997040241 A1 WO 1997040241A1 CH 9700139 W CH9700139 W CH 9700139W WO 9740241 A1 WO9740241 A1 WO 9740241A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sleeve
- structural steel
- steel rod
- rod
- pourable
- Prior art date
Links
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
- E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
-
- 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
- E04B1/003—Balconies; Decks
- E04B1/0038—Anchoring devices specially adapted therefor with means for preventing cold bridging
-
- 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
-
- 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
- E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
Definitions
- the present invention relates to a method for producing a multi-part reinforcing bar with at least one corrosion-resistant section according to the preamble of claim 1 and a reinforcing bar according to the preamble of claim 6.
- Reinforcing bars which must be corrosion-resistant, are therefore mostly made of stainless steel.
- Stainless steel is, however, massively more expensive than the reinforcing bars made of corrosion-prone structural steel that are usually used for reinforcing baskets.
- the reinforcing bars are made of corrosive structural steel, brought into the desired shape, for example bent, and then provided with corrosion protection in a surface treatment.
- this manufacturing process is relatively complex.
- DE-A-34 '46 '006 discloses a corrosion-protected reinforcing bar for bridging building joints.
- the reinforcing bar is surrounded at least over the length of the joint width by a corrosion-resistant sleeve which is applied to the reinforcing bar in a non-displaceable manner, for example by deformation.
- This corrosion-protected reinforcing bar has the necessary corrosion protection in the critical separation area, but it is hardly cost-effective to manufacture than the non-corroding reinforcing bars made of stainless steel that are usually used.
- reinforcement bars protected in this way cannot be deformed in the coated area.
- reinforcing irons, on which a stainless steel sleeve is clamped have a strong tendency to contact corrosion and thus fall below the necessary strength values.
- a tension or compression rod is known from DE-A-38 '01' 121, which can be used to connect two concrete elements or one concrete element to a rock wall. It consists of a rod made of corrosive material, which, in the separation area between the two elements to be connected, has a sleeve made of non-corroding material that surrounds the rod at a distance Material is surrounded, wherein the intermediate space with a molding capable ⁇ , curing mass is filled.
- a synthetic resin or a plastic-modified mortar is preferably used for the structural steel rod, for the stainless steel sleeve and for the pourable mass.
- this multi-part tension or compression rod has in particular increased compressive strength and is therefore suitable for absorbing considerably higher lateral forces when used in reinforcement cages.
- the inner structural steel rod can thus be dimensioned with a smaller diameter, which in turn saves material and reduces costs.
- the sleeve In the manufacture of this tension or compression rod, the sleeve is first pushed over the rod and the ends of the rod protruding from the sleeve are only then bent into the desired shape.
- reinforcing bars with corrosion protection can be produced in a wide variety of forms, the first intermediate product always being the same straight bar with a sleeve serving as corrosion protection.
- This intermediate product can be stored and only bent into the desired shape of the reinforcing bar if required. This reduces the manufacturing costs.
- the method according to the invention allows the production of any shape of reinforcing bars which can be provided with corrosion protection at any location. This opens up more diverse possibilities for the construction engineer in the placement of reinforcements, which extend over separation areas.
- the castable, curing mass which fills the space between the steel rod and the sleeve, prevents corrosion ⁇ contact which would result from contact between a structural steel rod and a sleeve of a different steel or metal.
- the tensile strength of the castable mass is determined the minimum radius which can be achieved when the reinforcing rod is curved without cracks in the pourable mass leading to contact bridges and to the destruction of the structure.
- the reinforcement bars according to the invention have a higher compressive, tensile and flexural strength due to the composite. It is therefore advantageous not only to provide the reinforcing bars with a sleeve in the critical separation areas, but also to encase the entire structural steel bar. For many possible applications, however, it is sufficient to encase only a partial section.
- the protruding ends are preferably provided with means for a screw connection.
- the structural steel rod can be easily connected to adjacent structural steel rods without contacting the corrosion-resistant sleeve.
- This is advantageous for cantilever panel connections, for example.
- the reinforcement element in the joint area has to be corrosion-resistant.
- the adjoining reinforcing elements can be made in one piece from inexpensive structural steel rods.
- FIG. 1 is an illustration of a reinforcing bar in a stage of its manufacture, partly in section;
- FIG. 2 shows a reinforcing bar according to the invention in the form of a transverse force bar of a cantilever plate connecting element and
- Figure 3 shows a reinforcing bar according to the invention in the form of an anchoring hook.
- the reinforcing bar has a structural steel bar 1 made of corroding material, which serves as the actual reinforcing bar.
- the surface of the structural steel rod can be smooth or ribbed as shown.
- the ribs 10 increase the strength of the connection of the structural steel rod 1 on the one hand to the concrete, but on the other hand also to the pourable, hardening mass 3.
- This structural steel rod 1 is provided with a sleeve 2 without contact, so that the sleeve 2 does not touch the steel rod at any point. At least a portion of the structural steel rod 1 is covered by a sleeve 2.
- the size of the section is determined by the intended use of the reinforcing bar. If it elements for connecting two concrete ⁇ , for example, as a cantilever slab connection element, or for connecting a concrete element with a rock wall USAGE ⁇ det, the length corresponds to the partial section at least the width of the parting line.
- the sleeve 2 is made of a non-corroding material. For example, it can consist of a tube section made of stainless steel, a non-ferrous metal, a plastic, an alloy or a metal which is protected against corrosion by a coating with high adhesive strength.
- a pourable, hardening compound 3 is then filled with a pourable, hardening compound 3.
- Suitable materials for this are, in particular, synthetic resins and, to a certain extent, certain plastic-modified mortars, so-called injection mortars, which have a high flexural strength in the hardened state.
- the bending tensile strength is defined as the bending stress (quotient of bending moment and section modulus), which causes the first cracks to develop in the tensile zone in a component subjected to bending stress, the compressive strength of which is greater than its tensile strength.
- the section of the reinforcing bar 1 provided with the sleeve 2 is bent.
- the structural steel rod 1 alone has a curvature, but the entire composite of structural steel steel 1, pourable, now hardened mass 3 and sleeve 2 are bent together into the desired shape.
- the high bending tensile strength and the relatively high compressive strength of the filling material enable the sleeve 2 to be bent at least approximately without kinks and practically without changing the diameter, similar to a sand-filled pipe.
- the relative position of the structural steel rod 1 in the sleeve 2 is practically not changed.
- the pourable mass 3 must have a corresponding bending tensile strength in the hardened state, depending on the desired bending radius.
- the bending tensile strength is preferably in the range between 60 and 120 MPa. Very good results were achieved with compositions with a bending tensile strength of 95 MPa.
- the structural steel rod 1 protrudes from the sleeve 2, it can be provided with known means for a screw connection in the course of the manufacturing process of the reinforcing rod or also at the end of the method.
- one end of the structural steel rod 1 is provided with a thread 11 and the other end with a threaded hole 12. Thanks to these means, the reinforcement rod can be connected to further reinforcement elements (not shown here), the corrosion-resistant sleeve 2 not making contact with the adjacent reinforcement elements, so that again no contact corrosion can occur.
- the reinforcing bar according to the invention can be used in a variety of ways:
- a shear force rod A is shown in FIG. 2, which can be used, for example, for cantilever plate connections.
- FIG. 3 shows an anchoring hook B in an installed position. Since the front, curved region 6 of the anchoring hook B has the corrosion-resistant sleeve 2, the concrete covering 4 can be reduced. This saves concrete, and the covering is also easier, which in turn allows the reinforcement to be made smaller.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Reinforcement Elements For Buildings (AREA)
- Golf Clubs (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Emergency Lowering Means (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59701974T DE59701974D1 (en) | 1996-04-22 | 1997-04-08 | ARMING ROD |
AT97914032T ATE194404T1 (en) | 1996-04-22 | 1997-04-08 | REINFORCEMENT BAR |
EP97914032A EP0895558B1 (en) | 1996-04-22 | 1997-04-08 | Reinforcing bar |
AU21482/97A AU2148297A (en) | 1996-04-22 | 1997-04-08 | Reinforcing bar |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01011/96A CH690448A5 (en) | 1996-04-22 | 1996-04-22 | Multipart reinforcing bar. |
CH1011/96 | 1996-04-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997040241A1 true WO1997040241A1 (en) | 1997-10-30 |
Family
ID=4200369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH1997/000139 WO1997040241A1 (en) | 1996-04-22 | 1997-04-08 | Reinforcing bar |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0895558B1 (en) |
AT (1) | ATE194404T1 (en) |
AU (1) | AU2148297A (en) |
CH (1) | CH690448A5 (en) |
DE (1) | DE59701974D1 (en) |
TW (1) | TW371691B (en) |
WO (1) | WO1997040241A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010016096B3 (en) * | 2010-03-23 | 2011-06-16 | Max Frank Gmbh & Co. Kg | cantilever panel |
DE102011054275A1 (en) | 2011-10-07 | 2013-04-11 | Max Frank Gmbh & Co Kg | Cantilever plate connecting element for connecting cover or base plate and projecting plate, has transverse load bar provided with loop section that is arranged in installed state in cantilever panel |
DE102011056967A1 (en) | 2011-12-23 | 2013-06-27 | Max Frank Gmbh & Co. Kg | Plate connecting element |
CN104674954A (en) * | 2015-02-16 | 2015-06-03 | 中交一航局第一工程有限公司 | Structure and method for preventing reinforcing steel from being corroded in highly-corrosive environment |
DE202016103345U1 (en) | 2016-06-23 | 2016-08-01 | Max Frank Gmbh & Co. Kg | Connection element for load-introducing components |
DE202016103344U1 (en) | 2016-06-23 | 2016-08-01 | Max Frank Gmbh & Co. Kg | Connection element for load-introducing components |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3579931A (en) * | 1969-09-18 | 1971-05-25 | Du Pont | Method for post-tensioning tendons |
EP0073170A2 (en) * | 1981-08-21 | 1983-03-02 | Freyssinet International (Stup) | Arched connecting element between two rectilinear portions of a tensional cable |
DE3801121A1 (en) * | 1987-02-19 | 1988-09-01 | Egco Ag | Tension or compression bar for connecting two concrete parts |
-
1996
- 1996-04-22 CH CH01011/96A patent/CH690448A5/en not_active IP Right Cessation
-
1997
- 1997-04-08 WO PCT/CH1997/000139 patent/WO1997040241A1/en active IP Right Grant
- 1997-04-08 DE DE59701974T patent/DE59701974D1/en not_active Expired - Lifetime
- 1997-04-08 AU AU21482/97A patent/AU2148297A/en not_active Abandoned
- 1997-04-08 AT AT97914032T patent/ATE194404T1/en not_active IP Right Cessation
- 1997-04-08 EP EP97914032A patent/EP0895558B1/en not_active Expired - Lifetime
- 1997-04-19 TW TW086105109A patent/TW371691B/en active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3579931A (en) * | 1969-09-18 | 1971-05-25 | Du Pont | Method for post-tensioning tendons |
EP0073170A2 (en) * | 1981-08-21 | 1983-03-02 | Freyssinet International (Stup) | Arched connecting element between two rectilinear portions of a tensional cable |
DE3801121A1 (en) * | 1987-02-19 | 1988-09-01 | Egco Ag | Tension or compression bar for connecting two concrete parts |
Also Published As
Publication number | Publication date |
---|---|
AU2148297A (en) | 1997-11-12 |
EP0895558B1 (en) | 2000-07-05 |
ATE194404T1 (en) | 2000-07-15 |
CH690448A5 (en) | 2000-09-15 |
TW371691B (en) | 1999-10-11 |
DE59701974D1 (en) | 2000-08-10 |
EP0895558A1 (en) | 1999-02-10 |
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