Seismic Design of Special Concentrically Braced Steel Frames

This portion of the booklet illustrates the general
requirements for the seismic analysis and design of a
7-story building using the 1994 Uniform Building
Code.
Both the determination of seismic forces and their
distribution over the height and planar extent of the
building are illustrated. In addition, the need for the
braced frames to successfully resist seismic overturnlng
forces is emphasized to the reader.
All of the seismic analysis is presented for a Regular
Structure using the Static Lateral-Force Procedure of
UBC Section 1628.2. However, since the building is
over five stories in height (see UBC Section 1627.8.2,
Item 3), if it were an Irregular Structure as defined in
UBC Section 1627.8.3, Item 2, a Dynamic Analysis
would be required for seismic forces.
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