Les connexions en acier répertoriées dans cet article sont conçues conformément à la norme australienne AS 4100:2020, Manuel de connexion de l'Institut australien de l'acier 1, et les guides de conception de l'Australian Steel Institute 1-5.
Scope of the AS 4100 Module
Before going through the connection types, it is worth being clear about what the module covers under AS 4100.
AS 4100:2020 design in SkyCiv is for shear connections between I-sections, in metric units. Connexions momentanées, splices and bracing connections are outside the current AS 4100 scope.
Poutre universelle à colonne universelle
Beam to column connections are among the most common connection types in steel design. The AS connections in SkyCiv are built around a supported beam framing into a supporting member, and the orientation can be set to a column flange support, a column web support, or a beam web support.
That third orientation means the same four connection types can also be used beam to beam, not only beam to column.
Only one connection to a node can be designed at a time. Lorsqu'il s'agit de connexions dos à dos, il est conseillé de prendre des hypothèses conservatrices sur le chemin de charge.
Connexions de cisaillement
A shear connection is a simple connection. It is detailed to carry the beam end reaction and to rotate at the joint rather than to carry end moment, which is what separates it from a moment connection. In the AS module it is designed for shear alone, with no concurrent axial load.
Pour la conception AS, the following shear connection types are available:
Each of the four is available beam to column flange, beam to column web, and beam to beam web.
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- Plaque latérale Web – Poutre à bride de colonne
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- Plaque latérale Web – Ame poutre-poteau
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- Plaque d'extrémité flexible – Poutre à bride de colonne
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- Plaque d'extrémité flexible – Ame poutre-poteau
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- Angle unique – Poutre à bride de colonne
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- Angle unique – Ame poutre-poteau
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- Angle double – Poutre à bride de colonne
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- Angle double – Ame poutre-poteau
The design of the above shear connections was based mainly on ASI Design Guides 3, 4 et 5. The reference formulas were taken from the AS 4100:2020 manuel, while the rest of the calculations and criteria were taken from the ASI Connection Handbook 1.
Coefficient de groupe de boulons
Pour plus de flexibilité sur la disposition des boulons et l'espacement des boulons, SkyCiv a adapté la méthode ICOR et l'analyse inélastique pour déterminer le coefficient de groupe de boulons C, which is then used to calculate the bolt group shear capacity and bolt bearing capacity.
The Instantaneous Centre of Rotation Method (ICOR) utilise l'itération pour localiser l'IC du groupe de boulons. SkyCiv utilise son propre solveur pour ces itérations. L'emplacement du CI est inclus dans les calculs, but the iterations are not shown, to keep the report concise and readable.
The equation used to calculate the force per bolt using the inelastic analysis is based on AISC Eq. (7-1) sur la page 7-7 du manuel AISC 15e édition. L'équation est indiquée ci-dessous.
[math] R = R_{ultime}\la gauche(1-e^{-10\Delta}\droite)^{0.55} [math]
This is a method borrowed for the bolt group solver, not a change of design code. The capacities themselves are still checked to AS 4100:2020.
Étant donné que la capacité du groupe de boulons a adapté la méthode AISC, the provisions for determining the design bolt eccentricity of the bolt group also follow Table 10-9 de l'AISC 15e édition. This applies to SkyCiv’s AS Web Side Plate connection.
Eccentricity is handled differently for each type. Pour les connexions à angle unique, both the NSL and OSL legs are designed with load eccentricity. Pour les connexions à double angle, only the NSL leg is designed with eccentricity, since the OSL leg is symmetrically balanced about the line of force. For Flexible End Plate connections there is no eccentricity either, as the load acts directly on the centre of the bolt group. Every bolt group without eccentricity takes the bolt coefficient C as the total number of bolts in the group.
Types de luminaires
Each interface can be set as a bolted or a welded fixture, at the beam and at the support.
For the bolted case, see the documentation on boulons; for the welded case, voir soudures.
Limitations détaillées
Detailing limitations, the fit-up checks on the connections, are included in the AS connection design. Most of them are based on ASI Design Guides 3-5, while some follow an intuitive engineering approach.
These checks catch the connection that satisfies every strength calculation and still cannot be built or erected, which is a failure mode that strength checks alone will not find.
A pass or fail result for the detailing limitations appears on the Results tab, so it can be identified quickly. Le rapport de calcul produit également un tableau, indiquée ci-dessous, so the item that needs to be modified is easy to pick out.
Plus de types de connexion
Should you wish to see more connection types added under AS 4100, vous pouvez contacter Assistance SkyCiv.
Try it now
Pick a web side plate, plaque d'extrémité flexible, single angle or double angle, enter your beam, support and loads, and the module returns every check with its utilization ratio and the reference behind it, along with the detailing limitation table. Il s'exécute dans le navigateur, with nothing to install, and you can do it without an account.
You can also reach it through the Calculateur de conception d'assemblages en acier gratuit.
Inscrivez-vous au compte gratuit
A free account lets you save and reload your connection files, which the free tool does not. It also gives you access to the rest of SkyCiv’s logiciel structurel, y compris la 3D structurelle.
Conception de connexion autonome
Vous souhaitez utiliser uniquement le module de conception de connexion? Cliquez sur le bouton ci-dessous pour le prix autonome.
