Course Description
This course is intended to provide understanding on design theory and the rationale behind code provisions as well as the application of specific Code formulae and requirements. It will cover the design of seismic resisting systems for steel framed buildings to the requirements of the 2005 National Building Code of Canada and the pertinent provisions of CSA Standard S16-01, including S16S1-05.
NBCC 2005 introduces very substantial technical changes, including a new subsection on Earthquake Load and Effects. Major changes include:
- uniform hazard spectra replace Zonal ratios and Response factors
- dynamic analysis becomes the standard method, static method the exception
- 2% probability in 50 years
- period-dependent site coefficients replace Foundation factors
- overstrength related force modification factors for various systems
- irregularities defined and various restrictions and requirements imposed
- new load factors for companion loads and building importance categories that also affect the determination of seismic effects
To reconcile the new NBCC requirements, CSA has issued S16S1-05, Supplement #1 to CAN/CSA-S16-01. All of these changes necessitate a fresh look at the underlying framing decisions to be taken by designers. Not only do they affect the load assessment and design of the building structure, but designers should not rely solely on past experience in the search for the most economical solution.
The course will include an overview of the subsection on Earthquake Load and Effects and other new NBCC provisions that affect seismic design of steel framed buildings. The presenters will also highlight major changes introduced in Clause 27 of
CAN/CSA-S16-01 (S16S1-05). For topics other than seismic design, refer to the CISC Steel Framed Commercial Building Design course.
References: The Ninth Edition of the CISC Handbook of Steel Construction (2006), which contains the Consolidated version of CAN/CSA-S16-01 (S16S1-05) and Commentary.
Course Content
The course notes incorporate design examples for buildings of common configurations that range from one to ten storeys in height. These examples cover various seismic force resisting systems and topics, including:
- Conventional construction
- Tension only braced frames
- Chevron concentrically braced frames
- Split X concentrically braced frames
- Ductile eccentrically braced frames
- Type LD moment resisting frames
- Ductile moment resisting frames
- Notional loads
- P-delta effects
- Roof and floor diaphragms
- Selected connections
|
 |
|