Steel Structure Design Methods ?
What are Methods of Steel Structure Design?
There are three different methods for design of steel structure, i.e.
simple design,
continuous design and
semi-continuous steel design
1. Simple Design
is the most traditional approach and is still commonly used. It is assumed that no moment is transferred from one connected member to another, except for the nominal moments which arise as a result of eccentricity at joints.
The resistance of the structure to lateral loads and sway is usually ensured by the provision of bracing or, in some multi-storey buildings, by concrete cores.
2. Continuous Design
In continuous design, it is assumed that joints are rigid and transfer moment between members. The stability of the frame against sway is by frame action (i.e. by bending of beams and columns).
The connections between members must have different characteristics depending on whether the design method for the frame is elastic or plastic.
The joint must be able to carry the moments, forces and shears arising from the frame analysis.
3. Semi-Continuous Design
semi-continuous design is more complex than either simple or continuous design as the real joint response is more realistically represented. Analytical routines to follow the true connection behaviour closely are highly involved and unsuitable for routine design, as they require the use of sophisticated computer programs.
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