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Instructor Information: Alexander Newman, P.E., F.ASCE
Course Length: 1.5 Hours
This webinar was co-sponsored by ASCE's Structural Engineering Institute and ASCE Continuing Education
Purpose and Background
Structural steel design for gravity loads is familiar to most structural engineers, but the design for lateral load resistance tends to be more complex. With the recent changes that have taken place in this area, many engineers have a lot of questions about today’s rules. What R-value of the lateral-force-resisting system is the most economical in the areas of low and moderate seismicity? When should the AISC Seismic Provisions for Structural Steel Buildings be used, and when is following the AISC Specification sufficient? Is the metal-deck diaphragm rigid or flexible? How should it be connected to the wall bracing? Which wall bracing is allowed today?
This webinar provides a practical overview of the issues involved in the design of structural-steel buildings for lateral load resistance and answers everyday questions such as those asked above. The presentation starts with a summary of the main issues pertaining to the design of lateral force-resisting systems, including a brief overview of the relevant AISC documents. It proceeds to a discussion of the diaphragms used in structural steel buildings. Next on the agenda are the various vertical lateral force-resisting elements used in steel buildings, such as moment-resisting frames, braced frames, and shear walls. The discussion covers their connections at the elevated floors and at the base.
Learning Outcomes/Benefits
- Become familiar with the seismic provisions in the 2005 AISC Specification and AISC Seismic Provisions for Structural Steel Buildings and find out when each document should be used
- Understand the difference between special, intermediate, and ordinary moment frames
- Learn when tension-only bracing is allowed in steel structures
- Explore the economical ways of designing braced-frame connections
- Find out how to resist shear and tension forces at the base of braced frames and other vertical lateral-force-resisting elements
- Discuss why anchor rods are not the preferred method of resisting shear in structural steel buildings, and how to design them for combined shear and tension if they are used
- Explore practical design details for attaching bearing and nonbearing shear walls to structural-steel framing
- Find out how to connect chords to webs in steel-building diaphragms
Intended Audience
Structural and civil engineers, architects, facility managers, and building officials seeking to learn more about design for lateral load resistance in structural steel will benefit from this webinar.
Webinar Outline
- Review basics and applicable standards for steel design
- Code provisions for lateral-load design with steel
– Seismic Provisions of AISC Specification, 2005 Edition
– AISC Seismic Provisions for Structural Steel Buildings - Diaphragms used in steel buildings
- Vertical lateral-force-resisting elements
– Moment-resisting frames
– Braced frames
– Shear walls
– Connections at the base of bracing