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For the calculation of connections, the following characteristics of connection are introduced in EN 1993-1-8:
This design method allows us to determine a "Moment-rotation characteristic", which in tum allows us to represent the real connection by a rotational spring connection defined in the center lines of column and connected beam in the point of their intersection (approximation to the real behaviour of the connection).
By using this method, the design of non-stiffened connections can be considered, which results in a reduction of the total cost of structural steelwork.
The principles for the connection design are satisfied for a beam-column and beam to beam connections, when the detailed application rules given in the EN 1993-1-8, Art 6.7.1 - Design moment resistance of beam-to-column joints and splices, are followed. For the design of column bases, the application rules given the EN 1993-1-8, Art 6.7.1 - Design resistance of column bases with base plates, are followed.
The following types of connections are supported :
The types "Beam-to-beam" and "Column bases" are limited to symmetric and asymmetric I beams (including the elements with variable height) and RHS sections, both for major-axis bending configurations.
For the type " Beam-to-column", the beam element is limited to symmetric and asymmetric I beams (including the elements with variable height) and RHS sections, both for major-axis bending configuration ; the column element is limited to symmetric I beams (including elements with variable height) in major-axis configuration, and to symmetric I beams in minor-axis bending configuration.