De in dit artikel genoemde stalen verbindingen zijn ontworpen in overeenstemming met de Australian Standard ALS 4100:2020, Verbindingshandboek van het Australian Steel Institute 1, en ontwerpgidsen van het 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.
ALS 4100:2020 design in SkyCiv is for shear connections between I-sections, in metric units. Momentverbindingen, splices and bracing connections are outside the current AS 4100 scope.
Universele balk naar universele kolom
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. Als het gaat om back-to-back-verbindingen, het is raadzaam om conservatieve aannames te doen over het belastingspad.
Afschuifverbindingen
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.
Voor het AS-ontwerp, 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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- Webzijplaat – Balk naar Kolom Flens
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- Webzijplaat – Web van straal naar kolom
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- Flexibele eindplaat – Balk naar Kolom Flens
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- Flexibele eindplaat – Web van straal naar kolom
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- Enkele hoek – Balk naar Kolom Flens
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- Enkele hoek – Web van straal naar kolom
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- Dubbele hoek – Balk naar Kolom Flens
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- Dubbele hoek – Web van straal naar kolom
The design of the above shear connections was based mainly on ASI Design Guides 3, 4 en 5. The reference formulas were taken from the AS 4100:2020 handmatig, while the rest of the calculations and criteria were taken from the ASI Connection Handbook 1.
Boutgroepcoëfficiënt
Voor flexibiliteit bij de boutopstelling en boutafstand, SkyCiv heeft de ICOR-methode en inelastische analyse aangepast bij het bepalen van de boutgroepcoëfficiënt C, which is then used to calculate the bolt group shear capacity and bolt bearing capacity.
The Instantaneous Centre of Rotation Method (ICOR) gebruikt iteratie om de IC van de boutgroep te lokaliseren. SkyCiv gebruikt zijn eigen oplosser voor deze iteraties. De locatie van het IC wordt meegenomen in de berekeningen, 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) op pagina 7-7 van de AISC 15e editie-handleiding. De vergelijking wordt hieronder weergegeven.
[wiskunde] R = R_{ult}\links(1-e^{-10\Delta}\Rechtsaf)^{0.55} [wiskunde]
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.
Omdat de capaciteit van de boutgroep de AISC-methode heeft aangepast, the provisions for determining the design bolt eccentricity of the bolt group also follow Table 10-9 van de AISC 15e Ed. This applies to SkyCiv’s AS Web Side Plate connection.
Eccentricity is handled differently for each type. Voor enkele hoekverbindingen, both the NSL and OSL legs are designed with load eccentricity. Voor dubbele hoekverbindingen, 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.
Armatuurtypen
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 bouten; for the welded case, zien lassen.
Beperkingen detailleren
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. Het rekenrapport levert tevens een tabel op, hieronder weergegeven, so the item that needs to be modified is easy to pick out.
Meer verbindingstypen
Should you wish to see more connection types added under AS 4100, u kunt contact opnemen SkyCiv-ondersteuning.
Try it now
Pick a web side plate, flexibele eindplaat, 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. It runs in the browser, with nothing to install, and you can do it without an account.
You can also reach it through the Gratis stalen verbindingsontwerpcalculator.
Aanmelden voor gratis account
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 structurele software, inclusief Structural 3D.
Verbindingsontwerp standalone
U wilt alleen de verbindingsontwerpmodule gebruiken? Klik op onderstaande knop voor de losse prijzen.
