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The values for R, Ω0, and Cd at structural systems in Table 12.2-1 are choosen for structural steel and reinforced concrete systems. |
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C12.2 STRUCTURAL SYSTEM SELECTION
In a moment-resisting frame system, moment-resisting connections between the columns and beams provide lateral resistance. In Table 12.2-1, such frames are classified as ordinary, intermediate, or special. In high seismic design categories, the anticipated ground motions are expected to produce large inelastic demands, so special moment frames designed and detailed for ductile response in accordance with Chapter 14 are required. In low Seismic Design Categories, the inherent overstrength in typical structural designs is such that the anticipated inelastic demands are somewhat reduced, and less ductile systems may be used safely.
12.2.4 Combination Framing Detailing Requirements
Structural members common to different framing systems used to resist seismic forces in any direction shall be designed using the detailing requirements of ASCE 7-16 Chapter 12.
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