Task Order 9 (ATC-82 Project), Improved Procedures for Selecting and Scaling Earthquake Ground Motions for Performing Time-History Analyses. The primary objective of this task is to develop guidance for selecting, generating, and scaling earthquake ground motions for effective use in performing response history analyses, such that ground motion uncertainties do not dominate the accuracies of these analyses. The project should also identify areas of research that are needed to further improve the guidance that is developed.
This task has been completed and produced the NIST GCR 11-917-15 report, Selecting and Scaling Earthquake Ground Motions for Performing Response-History Analyses, you can find this report on the attachments tab.