Le connessioni in acciaio elencate in questo articolo sono progettate in conformità con lo standard australiano AS 4100:2020, Manuale di connessione dell'Australian Steel Institute 1, e le guide alla progettazione dell'Australian Steel Institute 1-5.
Scope of the AS 4100 Modulo
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. Connessioni del momento, splices and bracing connections are outside the current AS 4100 scope.
Trave universale a colonna universale
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. Quando si tratta di connessioni back-to-back, si consiglia di assumere ipotesi conservative sul percorso del carico.
Collegamenti a taglio
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.
Per il design 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.
-
- Piastra laterale web – Flangia trave e colonna
-
- Piastra laterale web – Trave a colonna Web
-
- Piastra terminale flessibile – Flangia trave e colonna
-
- Piastra terminale flessibile – Trave a colonna Web
-
- Angolo singolo – Flangia trave e colonna
-
- Angolo singolo – Trave a colonna Web
-
- Doppio angolo – Flangia trave e colonna
-
- Doppio angolo – Trave a colonna Web
The design of the above shear connections was based mainly on ASI Design Guides 3, 4 e 5. The reference formulas were taken from the AS 4100:2020 Manuale, while the rest of the calculations and criteria were taken from the ASI Connection Handbook 1.
Coefficiente di gruppo dei bulloni
Per flessibilità sulla disposizione dei bulloni e sulla spaziatura dei bulloni, SkyCiv ha adattato il metodo ICOR e l'analisi anelastica per determinare il coefficiente C del gruppo di bulloni, which is then used to calculate the bolt group shear capacity and bolt bearing capacity.
The Instantaneous Centre of Rotation Method (ICOR) usa l'iterazione per individuare l'IC del gruppo di bulloni. SkyCiv utilizza il proprio risolutore per queste iterazioni. La posizione dell'IC è inclusa nei calcoli, 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) alla pagina 7-7 del Manuale AISC 15a edizione. L'equazione è mostrata di seguito.
\[ R = R_{ult}\sinistra(1-e^{-10\Delta}\giusto)^{0.55} \]
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.
Poiché la capacità del gruppo di bulloni ha adattato il metodo AISC, the provisions for determining the design bolt eccentricity of the bolt group also follow Table 10-9 dell'AISC 15a ed. This applies to SkyCiv’s AS Web Side Plate connection.
Eccentricity is handled differently for each type. Per connessioni ad angolo singolo, both the NSL and OSL legs are designed with load eccentricity. Per connessioni ad angolo doppio, 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.
Tipi di dispositivi
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 bulloni; for the welded case, vedere saldature.
Limitazioni di dettaglio
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. Il rapporto di calcolo produce anche una tabella, mostrato sotto, so the item that needs to be modified is easy to pick out.
Altri tipi di connessione
Should you wish to see more connection types added under AS 4100, puoi contattare Supporto SkyCiv.
Try it now
Pick a web side plate, piastra terminale flessibile, 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. Funziona nel browser, with nothing to install, and you can do it without an account.
You can also reach it through the Calcolatrice gratuita per la progettazione di connessioni in acciaio.
Iscriviti all'account gratuito
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 software strutturale, compreso il 3D strutturale.
Design della connessione autonomo
Si desidera utilizzare solo il modulo di progettazione della connessione? Fare clic sul pulsante in basso per i prezzi autonomi.
