Abstract
Recent California earthquakes demonstrated that while California's current building codes are generally adequate to protect life safety, they lack the requirements needed for protection from economic disaster and the loss of essential services after an earthquake. Hence, new design approaches for producing buildings that not only protect life safety, but also are capable of reliably satisfying a number of enhanced performance goals, are becoming available for use. Two U.S. efforts, the Vision 2000 and ATC–33 projects, represent important milestones in the development of the next generation of seismic codes. These efforts employ performance-based engineering concepts with the intent of yielding structures with predictable seismic performance within defined levels of risk and reliability. Through these efforts, building owners, architects, engineers, and the financial community are likely to have the opportunity to make informed decisions regarding performance of structures in the event of an earthquake. In addition, new design approaches for producing buildings, which not only protect life-safety, but also are also capable of reliably satisfying a number of enhanced performance goals are being developed.
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