ANSI/AISC 341-10 Seismic Provisions for Structural Steel Buildings

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Clarifying the intended combination of this document with the provisions of ACI 318 for composite construction systems

• Establishing a new chapter on analysis requirements that applies to all systems
• Adding terms to clearly identify the level of ductile response capable of various members in the seismic force resisting system (SFRS)
• Adding language to clarify the design of members and connections that are not part of the SFRS for deformation compatibility
• Including a discussion of the "Basis of Design" that explains the intended seismic response characteristics of each structural system
• Improving the consistency, clarity and completeness of how each structural system treats all aspects of the seismic design and detailing
• Adding requirements for two cantilever column systems to be consistent with other systems in these Provisions and the seismic design parameters ASCE/SEI 7-10
• Adding analysis requirements to address the inelastic response of special concentrically braced frames
• Modifying the connection requirements for braced frame systems to ensure that the expected deformation demands can be accommodated
• Adding requirements for the use of box-shaped link beams in eccentrically braced frames
• Adding requirements for the use of perforated plates in special plate shear walls
• Significantly increasing the detail for the design requirements of composite systems, such that they are consistent with structural steel systems
• Incorporating AWS D1.8/D1.8M by reference for welding related issues

By The AISC Committee on Specifications, Task Committee 9