CH284016A - Construction element made of wood. - Google Patents
Construction element made of wood.Info
- Publication number
- CH284016A CH284016A CH284016DA CH284016A CH 284016 A CH284016 A CH 284016A CH 284016D A CH284016D A CH 284016DA CH 284016 A CH284016 A CH 284016A
- Authority
- CH
- Switzerland
- Prior art keywords
- construction element
- wood
- carrier
- element according
- element made
- 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
- E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
- E04C3/18—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with metal or other reinforcements or tensioning members
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Description
Konstruktionselement aua Holz. Gegenstand vorliegender Erfindung ist ein Konstruktionselement, das durch einen vorge spannten Holzträger gebildet ist. Die Ver wendung vorgespannter Betonträger ist zwar bekannt, doch wurde aus den zahlreichen Vor teilen nicht der Schluss gezogen, dass es vor teilhaft sein könnnte, auch Holzträger vorzu spannen.
Vergleichende Untersuchungenhaben nun ergeben, dass auch vorgespannte Holz träger, welche gerade oder gebogen sein kön nen und die als Vollträger oder aus mitein ander verleimten Lamellen bestehen können, unter dem Einfluss der Belastung (einschliess lich des Eigengewichtes) ein sehr günstiges Spannungsbild ergeben, unter Berücksichti gung der Einflüsse der Temperaturänderung beider Materialien (Holz und Vorspann material) und des Sehwindens und Quellens.
In der beiliegenden Zeichnung sind zwei beispielsweise Ausführungsformen des Erfin dungsgegenstandes sehematiscli dargestellt, und zwar zeigen: Fig. 1 und 3 je eine Ausführungsform in Seitenansicht., Fig. 2 eine Stirnansicht zu Fig.1, und Fig. 4- zeigt im Querschnitt einen Zwil lingsträger.
In den Fig. 1, 2 ist ein gerader Träger 1 dargestellt, der voll oder lamelliert sein kann und der auf seiner Unterseite in Längsrich tung verlaufende Schlitze 2 aufweist. In diese letzteren sind die die Vorspannung erzeugen den Metallarmierungen, im vorliegenden Bei- spiel Stahldrähte 3, eingelegt, die unter Span nung von z. B. 10 bis 11 t/em2 stehen. Die verdickten Enden 4 der Drähte ruhen auf. Platten 5, welche quer über die Enden der Schlitze 2 verlaufen und welche damit die Aufrechterhaltung der Vorspannung erwirken. Mit 6 sind die Auflager des Trägers 1 be zeichnet.
Die Fig. 3 zeigt einen gebogenen Träger, der im Prinzip gleich ausgebildet ist, wie der in Fig. 1 und 2 dargestellte Träger. Da er aber gebogen ist., verlaufen die Metallarmie- rungen 3 nur teilweise in den Schlitzen 2. Zur Erzeugung und Aufrechterhaltung der Vorspannung können Drähte oder Kabel oder Bänder z. B. aus Stahl verwendet werden.
Fig. 4 zeigt im Querschnitt einen Zwil lingsträger, bei welchem die Vorspannung im Zwischenraum 7 angeordnet ist.
Die Untersuchungen haben ergeben, dass die dargestellte Ausführungsform Lösungen ermöglicht. für Decken- und Dachkonstruk tionen, Vordächer, exzentrisch beanspruchte Träger und Stützen, Tragroste, Scheiben, Schalen usw. Durch günstige Formgebung. z. B. geleimter durchlaufender und auskragen der Träger, kann mit Hilfe der Vorspannung für ganz bestimmte massgebende Belastungs zustände an den kritischen Stellen ein gün stiges Spannungsbild erhalten werden und damit eine sehr wirtschaftliche Lösung für die gestellte Aufgabe.
Construction element made of wood. The present invention is a structural element which is formed by a prestressed wooden beam. The use of prestressed concrete girders is known, but from the numerous advantages it was not concluded that it might be advantageous to prestress wooden girders as well.
Comparative studies have now shown that prestressed wooden beams, which can be straight or curved and which can consist of full beams or of lamellas glued together, result in a very favorable stress pattern under the influence of the load (including the dead weight), under consideration the influences of the temperature change of both materials (wood and prestressing material) and the sore eyes and swelling.
In the accompanying drawings, two exemplary embodiments of the subject of the invention are shown sehematiscli, namely show: FIGS. 1 and 3 each an embodiment in side view., FIG. 2 is an end view of FIG. 1, and FIG. 4- shows a twin in cross section carrier.
In Figs. 1, 2, a straight carrier 1 is shown, which can be fully or lamellar and has slots 2 running in the longitudinal direction on its underside. The metal reinforcements, in the present example steel wires 3, are inserted into the latter, which are tensioned by z. B. 10 to 11 t / em2. The thickened ends 4 of the wires rest. Plates 5 which run across the ends of the slots 2 and which thus maintain the prestress. With 6, the supports of the carrier 1 are be distinguished.
FIG. 3 shows a curved carrier which, in principle, has the same design as the carrier shown in FIGS. 1 and 2. However, since it is bent, the metal reinforcements 3 run only partially in the slots 2. To generate and maintain the pretension, wires or cables or bands can be used, e.g. B. steel can be used.
Fig. 4 shows in cross section a twin carrier, in which the bias is arranged in the space 7.
The investigations have shown that the embodiment shown enables solutions. For ceiling and roof constructions, canopies, eccentrically stressed beams and supports, support grids, panes, shells, etc. Thanks to their favorable shape. z. B. glued continuous and cantilevered the carrier can be obtained with the help of the preload for very specific decisive load conditions at the critical points, a favorable stress pattern and thus a very economical solution for the task.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH284016T | 1950-08-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH284016A true CH284016A (en) | 1952-07-15 |
Family
ID=4484337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH284016D CH284016A (en) | 1950-08-22 | 1950-08-22 | Construction element made of wood. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH284016A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1008472B (en) * | 1954-03-06 | 1957-05-16 | Lothar Kuerten | Support grating, in particular roof construction, made of wooden planks crossing one another in one plane |
US3251162A (en) * | 1962-01-25 | 1966-05-17 | Pierce J Strimple | Laminated prestressed beam construction |
EP0518246A2 (en) * | 1991-06-14 | 1992-12-16 | Berthold Fries | Method for production of wooden hollow beams and forms of this beam obtained by this method |
WO2001042584A1 (en) * | 1999-12-07 | 2001-06-14 | Antonello Gasperi | Method for the construction of a prestressed structure and prestressed structure thus obtained |
CN104533014A (en) * | 2014-12-24 | 2015-04-22 | 南京工业大学 | Concealed prestressed wood beam |
EP2449187B1 (en) * | 2009-07-01 | 2016-10-19 | Université de Lorraine | Method for manufacturing fibrous material assemblies to produce supporting structure and assembly produced by said method. |
US20190382997A1 (en) * | 2017-02-24 | 2019-12-19 | Knapp Gmbh | Device for coupling two vertical components |
-
1950
- 1950-08-22 CH CH284016D patent/CH284016A/en unknown
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1008472B (en) * | 1954-03-06 | 1957-05-16 | Lothar Kuerten | Support grating, in particular roof construction, made of wooden planks crossing one another in one plane |
US3251162A (en) * | 1962-01-25 | 1966-05-17 | Pierce J Strimple | Laminated prestressed beam construction |
EP0518246A2 (en) * | 1991-06-14 | 1992-12-16 | Berthold Fries | Method for production of wooden hollow beams and forms of this beam obtained by this method |
EP0518246A3 (en) * | 1991-06-14 | 1993-05-19 | Berthold Fries | Method for production of wooden hollow beams and forms of this beam obtained by this method |
WO2001042584A1 (en) * | 1999-12-07 | 2001-06-14 | Antonello Gasperi | Method for the construction of a prestressed structure and prestressed structure thus obtained |
EP2449187B1 (en) * | 2009-07-01 | 2016-10-19 | Université de Lorraine | Method for manufacturing fibrous material assemblies to produce supporting structure and assembly produced by said method. |
CN104533014A (en) * | 2014-12-24 | 2015-04-22 | 南京工业大学 | Concealed prestressed wood beam |
US20190382997A1 (en) * | 2017-02-24 | 2019-12-19 | Knapp Gmbh | Device for coupling two vertical components |
US10822788B2 (en) * | 2017-02-24 | 2020-11-03 | Knapp Gmbh | Device for coupling two vertical components |
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