CH229567A - Reinforced concrete beam. - Google Patents
Reinforced concrete beam.Info
- Publication number
- CH229567A CH229567A CH229567DA CH229567A CH 229567 A CH229567 A CH 229567A CH 229567D A CH229567D A CH 229567DA CH 229567 A CH229567 A CH 229567A
- Authority
- CH
- Switzerland
- Prior art keywords
- concrete beam
- reinforced concrete
- concrete
- steel wire
- tensile stress
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
- E04C3/26—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members prestressed
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Description
Armierter Betonbalken. Armierte Betonbalken, bei welchen die Armierung aus unter Zugspannung stehenden glatten Stahldrähten besteht, sind bekannt.
Gegerstand der Erfindung ist ein Schleu- derspannbetonbalken, das heisst ein im Schleuderverfahren hergestellter und mit unter Zugspannung stehenden Armierungs- cinlagen versehener Betonbalken, dessen Armierungseinlagen durch Stahldrahtlitze, jede Litze aus mindestens zwei miteinander verwundenen Stahldrähten bestehend, gebil det sind. Die aus der Verwindung der Drähte miteinander sich ergebende schraubenähnliche Oberflächenform der Stahldrahtlitzen ver schafft der Armierung eine erhöhte Haft festigkeit im Beton.
In der beiliegenden Zeichnung sind zwei Ausführungsbeispiele des Balkens dargestellt. Fig. 1 zeigt einen Querschnitt und Fig. 2 einen Längsschnitt der ersten Ausführungs form, während die Fig. d und 4 den Quer schnitt bezw. den Längsschnitt der zweiten Ausführungsform darstellen.
Fig. 5 zeigt eine aus zwei miteinander verbundenen Stahldrähten bestehende Stahl draUtlitze. In den Figuren sind mit c unter Zug spannung stehende Armierungsstahldraht- litzen bezeichnet, welche je aus zwei mit einander verwundenen Stahldrähten bestehen und welche in dem im Schleuderverfahren hergestellten Betonkörper eingebettet sind.,..
Das Spannen der Armierungseinlagen kann durch besondere Vorrichtungen, die an beiden Enden der Form lösbar angeordnet werden, erfolgen. Nach Erhärten des Betons werden diese Vorspannvorrichtungen gelöst. Die unter Zugspannung stehende Armierung setzt den Betonquerschnitt unter Druckspan nung.
Reinforced concrete beam. Reinforced concrete beams, in which the reinforcement consists of smooth steel wires under tension, are known.
The object of the invention is a centrifugally prestressed concrete beam, that is to say a concrete beam produced by the centrifugal method and provided with reinforcing elements under tensile stress, the reinforcing elements of which are formed by steel wire strands, each strand consisting of at least two steel wires twisted together. The screw-like surface shape of the steel wire strands resulting from the twisting of the wires with one another provides the reinforcement with increased adhesive strength in the concrete.
In the accompanying drawing, two embodiments of the beam are shown. Fig. 1 shows a cross section and Fig. 2 is a longitudinal section of the first embodiment, while Figs. D and 4 respectively the cross section. represent the longitudinal section of the second embodiment.
5 shows a steel wire strand consisting of two steel wires connected to one another. In the figures, c under tensile stress denotes reinforcing steel wire strands which each consist of two twisted steel wires and which are embedded in the concrete body produced using the centrifugal process., ..
The reinforcement inserts can be tensioned using special devices that are detachably arranged at both ends of the mold. After the concrete has hardened, these prestressing devices are released. The reinforcement, which is under tensile stress, puts the concrete cross-section under compressive stress.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE229567X | 1941-09-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH229567A true CH229567A (en) | 1943-11-15 |
Family
ID=5867883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH229567D CH229567A (en) | 1941-09-15 | 1942-08-29 | Reinforced concrete beam. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH229567A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003012225A2 (en) | 2001-07-20 | 2003-02-13 | Rwp Entwicklungs Gmbh | Building and construction method |
-
1942
- 1942-08-29 CH CH229567D patent/CH229567A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003012225A2 (en) | 2001-07-20 | 2003-02-13 | Rwp Entwicklungs Gmbh | Building and construction method |
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