Selection of Wind Design Level for Serviceability

• Serviceability and Motion Tolerance Performance Level

• 10-year return period

• Requires climatological and directionality analysis based on recorded data

• Serviceability acceptance criteria for drift to limit damage to nonstructural elements needs case-by-case assessment

• Occupant tolerance criteria for rms acceleration motion, such as ISO 6897

• Wind-tunnel testing is the primary analysis tool

• Requires dynamic structural properties

Previous slide

Next slide

Back to first slide

View graphic version

The suggested performance criteria of the National Research Council of Canada (1985), Irwin (1978), and ISO 6897 - 1984 are loosely based on the expectation that no more than 2 percent of the occupants of the top one-third of the building should object to the motion, a condition predicated on 5- to 10-year recurrence rates.