DE898799C - Rod network made of one-piece rods welded at the nodes - Google Patents
Rod network made of one-piece rods welded at the nodesInfo
- Publication number
- DE898799C DE898799C DEH4590A DEH0004590A DE898799C DE 898799 C DE898799 C DE 898799C DE H4590 A DEH4590 A DE H4590A DE H0004590 A DEH0004590 A DE H0004590A DE 898799 C DE898799 C DE 898799C
- Authority
- DE
- Germany
- Prior art keywords
- profile
- bar
- nodes
- profiles
- welded
- 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
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
-
- 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
-
- 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/08—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders
-
- 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
- E04C2003/026—Braces
-
- 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
- E04C2003/0413—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several parts
-
- 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
- E04C2003/0421—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section comprising one single unitary part
-
- 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
- E04C2003/043—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the hollow cross-section comprising at least one enclosed cavity
-
- 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
- E04C2003/0434—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the open cross-section free of enclosed cavities
-
- 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
- E04C2003/0469—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section triangular-shaped
-
- 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
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0486—Truss like structures composed of separate truss elements
- E04C2003/0491—Truss like structures composed of separate truss elements the truss elements being located in one single surface or in several parallel surfaces
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Description
Stabnetzwerk aus einteiligen, in den Knotenpunkten verschweißten Stäben Die Erfindung betrifft ein Stabnetzwerk aus einteiligen, in den Knotenpunkten verschweißten Stäben, und zwar werden erfindungsgemäß für die Druckstäbe hochwertige Knickprofile in Form einseitig offener, randverstärkter Hohldreikante, für die Zugstäbe dagegen übliche Profile verwendet. Die Anordnung der einseitig offenen Dreikantprofile und auch der normalen Winkel- oder U-Profile erfolgt dabei derart, daß ihre Symmetrieachse in die Netzebene fällt und ihre Öffnung nach unten zeigt, wodurch sich eine dachartige, korrosionsschützende Wirkung ergibt. Für die Netzwerkanschlüsse werden nun in den Knotenpunkten diese offenen Druckgurtprofile durch Einschweißen von Futterstücken, wie Bleche, T-Profilstücke od. dgl., zu allseitig geschlossenen, formsteifen Hohldreikanten ergänzt, so daß die Füllstäbe in einfacher Weise zwischen die ebenen Flächen dieser Dreikante und die ebenen Flächen der z. B. aus U-Stahl bestehenden Zuggurtprofile eingefügt werden können. Der Einbau der Füllstäbe erfordert somit nur ebene Schnitte, und die Verschweißung erfolgt durch quer zu -den Stabachsen verlaufende Nähte, wodurch im gleichen Anschluß Längs- und Quernähte, welche zufolge ihres verschiedenen elastischen Verhaltens kein einheitliches Zusammenwirken ergeben, vermieden werden.Bar network made of one-piece bars welded at the nodes The invention relates to a rod network made of one-piece, welded at the nodes Rods, namely, according to the invention, high-quality buckled profiles are used for the compression rods in the form of hollow triangular edges with reinforced edges, open on one side, for the tension rods on the other hand common profiles used. The arrangement of the triangular profiles open on one side and even the normal angle or U-profiles are done in such a way that their axis of symmetry falls into the net level and its opening points downwards, creating a roof-like, anti-corrosive effect results. For the network connections, the Junctions of these open pressure belt profiles by welding in lining pieces, such as sheets, T-profile pieces or the like, to form rigid hollow triangles that are closed on all sides added so that the cross bars in a simple manner between the flat surfaces of this Triangle and the flat surfaces of the z. B. made of U-steel tension chord profiles can be inserted. The installation of the cross bars therefore only requires flat cuts, and the welding takes place through seams running transversely to the rod axes, whereby in the same connection longitudinal and transverse seams, which according to their different elastic Behavior does not result in uniform interaction, should be avoided.
Die Erfindung hat ferner ein besonders günstiges Hohldreikantprofil für die Druckstäbe derartiger Stabnetzwerke zum Gegenstand. Versuche haben ergeben, daß zweckmäßig die dreieckäh.nliche Fläche der oberen Kantenverstärkung, die Summe der dreieckähnlichen Flächen der unteren Kantenverstärkungen sowie die Summe der Flächen der verbindenden Schenkel jeweils etwa ein Drittel der Gesamtfläche betragen. Ohne daß zur Sicherung der Gestaltfestigkeit Bindebleche, Querschotte od. dgl. vonnöten wären, läßt sich beispielsweise dabei ein Profilzahlwert von nur 1,75 erreichen, wenn erfindungsgemäß die Schenkel auf die zehnfache Länge ihrer Dicke parallelwandig sind und der größte Trägheitshalbmesser einer unteren Randverstärkungsteilfläche ein Viertel des kleinsten Trägheitshalbmessers des Gesamtprofils beträgt.Another object of the invention is a particularly favorable hollow triangular profile for the compression bars of such bar networks. Tests have shown that the triangular-like area of the upper edge reinforcement, the sum of the triangular-like areas of the lower edge reinforcements and the sum of the areas of the connecting legs each amount to approximately one third of the total area. Without the need for binding plates, transverse bulkheads or the like to secure the structural strength, a profile number value of only 1.75 can be achieved, for example, if according to the invention the legs are parallel-walled to ten times their length and the largest radius of inertia of a lower edge reinforcement partial area is a quarter of the smallest radius of inertia of the overall profile.
Eine weitere Verbesserung der Profilzahl bis auf =z,,4 läßt sich durch eine Verringerung der Dicke der Schenkel bis auf ein Fünfzehntel ihrer Länge erreichen. In diesem Fall müssen jedoch die Randverstärkungen der offenen Seite durch Bindebleche in Stabmitte oder in den Drittelpunkten verbunden werden.A further improvement in the profile number up to = z ,, 4 can be achieved achieve a reduction in the thickness of the legs to one fifteenth of their length. In this case, however, the edge reinforcements on the open side must be provided with binding plates be connected in the middle of the bar or in the third points.
In Wirklichkeit ist nämlich der Knickvorgang bei offenen hochwertigen Knickprofilen äußerst verwickelt, da Drillknicken, Beulen und mangelnde Gestaltfestigkeit das Biegungsknicken vorzeitig einleiten.. Diese verschiedenen Erscheinungen sind von der Profilform abhängig und stehen daher auch untereinander durch die Profilform in einem komplizierten Zusammenhang, welch-er durch Berechnung kaum erfaßbar ist. Für die genannten Querschnittsformen wurde daher durch Versuchsreihen der Beweis erbracht, d.aß die nach dem nein I sich errechnenden Knicktragfähigkeiten voll erreicht werden. Da außerdem die Trägheitsmomente, bezogen auf die beiden Hauptachsen, nahezu gleich groß sind-, so wird mit den Dreikantprofilen gemäß der Erfindung bei allseitiger Knicksicherheit die volle Tragfähigkeit mit geringster Querschnittsfläche, d. h. mit geringstem Materialaufwand erzielt.In reality, namely, the buckling process is in open high quality Kink profiles extremely complex, as torsional kinks, dents and a lack of structural strength initiate the flexural buckling prematurely .. These are different phenomena depend on the profile shape and are therefore also interrelated by the profile shape in a complicated context which can hardly be grasped by calculation. For the cross-sectional shapes mentioned, the proof was therefore provided by test series provided, i.e. that the buckling capacities calculated according to no I. have been fully achieved will. In addition, since the moments of inertia, based on the two main axes, are almost are the same size, so with the triangular profiles according to the invention on all sides Buckling safety the full load-bearing capacity with the smallest cross-sectional area, d. H. achieved with the least amount of material.
Auch die Material- und Werkstattkosten liegen niedrig, weil die Dreikantprofile nach den üblichen Walzvorgängen, beispielsweise dem Schmetterlingsverfahren, herstellbar sind und weil der Anschluß der Füllstäbe an die Gurtstäbe wegen der ebenen Zuschnitte weniger Werkstattarbeit erfordert als die bei profilierten Stäben auszuführenden Ausklinkungen oder die bei Rohren herzustellenden räumlichen Schnittkurven.The material and workshop costs are also low because the triangular profiles can be produced using the usual rolling processes, for example the butterfly process and because the connection of the cross bars to the chord bars because of the flat blanks requires less workshop work than that to be done with profiled bars Notches or the spatial intersection curves to be produced in pipes.
Wichtig ist ferner, daß die Knotenpunktausbildung sich durch das Einschweißen von genügend starken Blechen oder T-Profilabschnitten den auftretenden Stabkräften in einfachster Weise anpassen läßt, so d.aß die Ausnutzung der vollen Tragfähigkeit der Netzstäbe durch eine ungenügende Gestaltfestigkeit der Knotenpunkte nicht beeinträchtigt wird.It is also important that the node formation is achieved by welding from sufficiently strong metal sheets or T-profile sections to the bar forces that occur can be adjusted in the simplest way, so that the full load-bearing capacity is used the net bars are not affected by insufficient structural strength of the nodes will.
An Hand der (Zeichnung wird die Erfindung näher erläutert.The invention is explained in more detail using the (drawing.
Abb. i zeigt schematisch ein ebenes Netzwerk mit steigenden und fallenden Diagonalen. Hierbei sind die Druckstäbe gegenüber den Zugstäben durch stärkere Linien dargestellt und bestehen erfindungsgemäß aus Hohldreikantprofilen, während für die Zugstäbe Winkel- und U-Profile verwandt werden. In Abb. 2 ist dem Punkt A in Abb. i entsprechend der Anschluß eines gedrückten Stabes 2 und eines gezogenen Stabes 3 an den Druckgurt q. dargestellt.Fig. I shows schematically a plane network with rising and falling Diagonals. Here are the compression bars opposite the tension bars by thick lines shown and consist according to the invention of hollow triangular profiles, while for the Tension rods angle and U-profiles are used. In Fig. 2, point A in Fig. i corresponding to the connection of a pushed rod 2 and a drawn rod 3 to the pressure belt q. shown.
Abb. 3 zeigt im oberen Teil diesen Knotenpunkt im Schnitt. Das bei 5 und 6 unten offene Gurtprofil 4 ist durch den T-Profilabschnitt 7 91-schlossen. Der Anschluß des Stabes 3 an den Untergurt 8 ist im unteren Teil der Abb. 3 zu sehen..Fig. 3 shows this node in the upper part in section. That at 5 and 6 belt profile 4, which is open at the bottom, is closed by the T-profile section 7 91. The connection of the rod 3 to the lower chord 8 can be seen in the lower part of Fig. 3 ..
Abb. q. gibt die allgemeine Dreikantprofilform wieder. Die Flächenanteile der Kantenverstärkungen und der verbindenden Schenkel sind durch verschiedene Schraffuren unterschieden und mit f1, f2 und f3 bezeichnet. Die Verschweißung des Profils mit dem T-Profilabschnitt 7 erfolgt an den abgeschrägten Kanten durch V-Naht bei 9.Fig.q. shows the general triangular profile shape. The area proportions the edge reinforcements and the connecting legs are indicated by different hatching differentiated and designated with f1, f2 and f3. The welding of the profile with the T-profile section 7 is made on the beveled edges by a V-seam at 9.
Abb. 5 zeigt einen Teilschnitt durch räumliches Netzwerk, beispielsweise eines vierstieligen Gittermastes.. Das Dreikantprofil io ist im Knotenpunkt durch das eingeschweißte Blech ir gestaltfest geschlossen. Die Füllstäbe werden in den Ebenen i2 und 13 an die Dreikantflächen angeschweißt. In Abb. 6 wird ein abweichender OOuerschnitt des offenen Dreikantprofils mit der Flächenverteilung f1, f2 und f3 wiedergegeben. Die Schenkel f2 sind parallelwandig; ihre Dicke verhält sich zu ihrer Länge wie i : ioa. Die untere Randverstärkung f3 hat in z4-25 die Achse, auf die sich ihr größter Trägheitshalbmesser bezieht.Fig. 5 shows a partial section through a spatial network, for example a four-legged lattice mast. The triangular profile io is rigidly closed at the junction by the welded sheet metal ir. The cross bars are welded to the triangular surfaces in planes i2 and 13. In Fig. 6 a different cross-section of the open triangular profile with the area distribution f1, f2 and f3 is shown. The legs f2 are parallel-walled; their thickness is related to their length as i: ioa. The lower edge reinforcement f3 has the axis in z4-25 to which its largest radius of inertia relates.
Abb. 7 zeigt ein Profil analog zu Abb. 6, jedoch mit einem auf etwa r : 14 veiiminderten Wandstärkenverhältnis -des Schenkels f2. Entsprechend sind auch f1 und f3 schwächer. 16 ist das zur Aussteifung dienende eingeschweißte Bindeblech.Fig. 7 shows a profile analogous to Fig. 6, but with one to about r: 14 reduced wall thickness ratio -of the leg f2. Are accordingly also f1 and f3 weaker. 16 is the welded-in binding plate used for stiffening.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH4590A DE898799C (en) | 1950-07-18 | 1950-07-18 | Rod network made of one-piece rods welded at the nodes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH4590A DE898799C (en) | 1950-07-18 | 1950-07-18 | Rod network made of one-piece rods welded at the nodes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE898799C true DE898799C (en) | 1953-12-03 |
Family
ID=7144038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEH4590A Expired DE898799C (en) | 1950-07-18 | 1950-07-18 | Rod network made of one-piece rods welded at the nodes |
Country Status (1)
Country | Link |
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DE (1) | DE898799C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1264734B (en) * | 1959-04-25 | 1968-03-28 | Emil Mauritz Huennebeck Dipl I | Plug connection between the posts of a scaffolding |
-
1950
- 1950-07-18 DE DEH4590A patent/DE898799C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1264734B (en) * | 1959-04-25 | 1968-03-28 | Emil Mauritz Huennebeck Dipl I | Plug connection between the posts of a scaffolding |
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