Design of semi-continuous braced frames (P183)
This publication presents a method of analysis and design which permits semi-continuous braced steel frames to be designed by hand. (Published 1997)
In a semi-continuous frame the degree of continuity between the beams and columns lies between that assumed traditionally in simple or continuous design. The degree of continuity can be chosen to produce the most economic balance between the primary benefits associated with these two traditional alternatives.
This publication presents a method of analysis and design that permits semi-continuous braced frames to be designed by hand. The method is only marginally more complex than simple design, and connection details are straightforward (and therefore inexpensive). Connection forces and moments can be chosen so that column stiffening is not required. Despite this economy of both design effort and fabrication costs, when compared with simple design it is possible to achieve reduced beam depths and reduced beam weights.
Procedures are given for checks at both the ultimate and serviceability limit states, and a worked example of the approach is included.