DE801175C - Twisted or twisted prestressed concrete inserts with constant winding changes - Google Patents
Twisted or twisted prestressed concrete inserts with constant winding changesInfo
- Publication number
- DE801175C DE801175C DEP8316D DEP0008316D DE801175C DE 801175 C DE801175 C DE 801175C DE P8316 D DEP8316 D DE P8316D DE P0008316 D DEP0008316 D DE P0008316D DE 801175 C DE801175 C DE 801175C
- Authority
- DE
- Germany
- Prior art keywords
- twisted
- prestressed concrete
- constant winding
- concrete inserts
- winding changes
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0693—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a strand configuration
-
- 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
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2024—Strands twisted
- D07B2201/2026—Pitch changing over length
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2015—Construction industries
- D07B2501/2023—Concrete enforcements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Ropes Or Cables (AREA)
Description
Beim Spannbeton ist die Haltbarkeit und die Verbundwirkung ini wesentlichen abhängig von der Haftfestigkeit der hoch vorgespannten Einlagen im Beton. Versuche haben gezeigt, daß glatte Drähte ohne besondere Endverankerung von gewissen Belastungen ab, insbesondere bei kurzen Haftlängen, durch den Betonkörper gezogen werden, und daß diese Erscheinung besonders frühzeitig bei dynamischer Beanspruchung auftritt. Zwei oder mehr miteinander gebündelten Drähten oder profilierten Einlagen mit ovalem oder kantigem Querschnitt kann -zwar durch Verdrillung oder Verdrehung beim Ziehen (konstante Ganghöhe) die Eigenschaft eines höheren Haft- oder Formwiderstandes verliehen werden; doch hat sich gezeigt, daß auch dermaßen verdrehte Einlagen, besonders bei dynamischer Beanspruchung, wie eine Schraube mit großer Ganghöhe windend oder drehend im Betonkörper durchgezogen werden können, oder daß das Herausschrauben aus der Betonummantelung unter Torsionsbeanspruchung möglich ist.In prestressed concrete, durability and the bond effect are essential depending on the adhesive strength of the highly prestressed inserts in the concrete. try have shown that smooth wires without special end anchoring can withstand certain loads be pulled through the concrete body, especially with short adhesive lengths, and that this phenomenon occurs particularly early in the case of dynamic loading. Two or more wires bundled together or profiled inlays with an oval or angular cross-section - although by twisting or twisting when pulling (constant pitch) bestowed the property of a higher adhesion or form resistance will; but it has been shown that insoles that are so twisted, especially with dynamic stress, like twisting or turning a screw with a large pitch can be pulled through in the concrete body, or that the screwing out of the Concrete coating is possible under torsional stress.
Erfindungsgemäß wird eine verdrehte oder verdrillte Spannbetoneinlage mit veränderlicher Ganghöhe (ständiger Ganghöhenwechsel, stetig oder stufenartig) vorgeschlagen, welche ohne Verwendung besonderer Verankerungseinrichtungen auch bei überivindung der I laftspannung zwischen Beton und Einlage, lediglich infolge seines hohen Formwiderstandes nicht durch den Betonkörper gewunden oder drehend durchgezogen werden kann. Die gesamten "Zugkräfte der Einlagen können somit auf kürzesten Strecken finit Sicherheit auf den Beton übertragen werden, was insbesondere für die Herstellung von Spannbetonschwellen von grii(iter Wichtigkeit ist. Das 'Maß der Verdrehung oder Verdrillung kann innerhalb der zulässigen Grenzen (Festigkeitsabfall) beliebig gewählt werden. :Auch ist es möglich, einen Wechsel zwi@clieu gerader und verdrehter Strecke vorzunehmen.According to the invention, a twisted or twisted prestressed concrete insert is used with variable pitch (constant pitch change, continuous or step-like) proposed which without the use of special anchoring devices too when overcoming the actual tension between concrete and insert, only as a result Due to its high form resistance, it is not twisted or twisted through the concrete body can be pulled through. The entire "tensile forces of the deposits can thus be Shortest distances finite security can be transferred to the concrete, which in particular for the production of prestressed concrete sleepers is of great importance the twisting or twisting can be within the permissible limits (decrease in strength) can be chosen at will. : It is also possible to switch between straighter and twisted route.
Zur Verwendung eignen .ich alle Einlagen wil profiliertem Querschnitt, l;a»tig oder oval, oder go-Iliindelte kreisförmige Einlagen. Die Herstelltnig derartiger Einlagen bereitet keinerlei technische Schwierigkeiten.All inserts with a profiled cross-section are suitable for use. l; a »tig or oval, or go-tied circular inlays. The manufacture of such Deposits do not cause any technical difficulties.
In den Abb. i bis 8 sind einige Ausführungsformen dargestellt.Some embodiments are shown in FIGS.
So zeigen Abb. i und ? eine SIiallilbetolleilllagc. bei welcher eilt verwundenes und unverwuiidencs Drahtstück im ständigen Wechsel sich wiederholen.Thus Fig. I and? a SIiallilbetolleilllagc. at which rushes twisted and indwuiidencs piece of wire repeat themselves in constant change.
Die Abb. 3 und 4 zeigen Einlagen, bei welchen lediglich verschiedene Windungshöhen hintereinander angeordnet sind. Diese können nun gleichartig oder verschieden in ihrer Ganghohe sein.Figs. 3 and 4 show deposits in which only different Winding heights are arranged one behind the other. These can now be of the same type or be different in their pitch.
In Abb. 5 und 6 ist beispielsweise ein elliptischer Querschnitt dargestellt finit verschiedenen Windungshöhen, doch kann auch hierfür ein Wechsel von verwundenem und unverwundenem .Drahtstück gewählt werden.In Figs. 5 and 6, for example, an elliptical cross-section is shown finitely different winding heights, but a change from twisted and an untwisted piece of wire.
Die Abb. 7 und 8 zeigen weiterhin zwei verdrillte Drahtlitzen mit verschiedenen Windungshö hen, doch können auch mehrere Drähte gebündelt oder verdrillt werden.Figs. 7 and 8 also show two twisted wire strands different winding heights, but several wires can also be bundled or twisted will.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP8316D DE801175C (en) | 1948-10-02 | 1948-10-02 | Twisted or twisted prestressed concrete inserts with constant winding changes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP8316D DE801175C (en) | 1948-10-02 | 1948-10-02 | Twisted or twisted prestressed concrete inserts with constant winding changes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE801175C true DE801175C (en) | 1950-12-28 |
Family
ID=7361650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP8316D Expired DE801175C (en) | 1948-10-02 | 1948-10-02 | Twisted or twisted prestressed concrete inserts with constant winding changes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE801175C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE864322C (en) * | 1951-04-18 | 1953-01-22 | Innocenz Ronchetti | Prestressed concrete assembly supports |
FR2939459A1 (en) * | 2008-12-09 | 2010-06-11 | Soc Civ D Brevets Matiere | PROCESS FOR PRODUCING A REINFORCED CONCRETE PIECE AND A PART PRODUCED THEREBY |
JP2020105753A (en) * | 2018-12-27 | 2020-07-09 | 頴司 芝 | Structural member |
-
1948
- 1948-10-02 DE DEP8316D patent/DE801175C/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE864322C (en) * | 1951-04-18 | 1953-01-22 | Innocenz Ronchetti | Prestressed concrete assembly supports |
FR2939459A1 (en) * | 2008-12-09 | 2010-06-11 | Soc Civ D Brevets Matiere | PROCESS FOR PRODUCING A REINFORCED CONCRETE PIECE AND A PART PRODUCED THEREBY |
WO2010067023A1 (en) * | 2008-12-09 | 2010-06-17 | Societe Civile De Brevets Matiere | Method for producing a reinforced concrete part, and thus-produced part |
JP2012511647A (en) * | 2008-12-09 | 2012-05-24 | ソシエテ シヴィル デ ブルヴェ マティエール | Method for producing a reinforced concrete member and member produced by the method |
US11199000B2 (en) | 2008-12-09 | 2021-12-14 | Societe Civile De Brevets Matiere | Method for producing a reinforced concrete part, and thus-produced part |
JP2020105753A (en) * | 2018-12-27 | 2020-07-09 | 頴司 芝 | Structural member |
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