Task Order 25 (ATC-98 Project), Use of High-Strength Reinforcement in Earthquake-Resistant Concrete Structures. The report documents a study to evaluate whether using reinforcement with yield strength greater than 60 ksi in structural members that resist earthquake forces is appropriate in the United States. The report provides reviews of existing research to determine whether there is sufficient information to justify the use of reinforcement with specified yield strengths of 80 ksi (or even 100 ksi) for special moment frames and special structural walls, and to identify performance and design issues associated with the use of reinforcement with yield strengths of 120 ksi or more. In addition, to evaluate whether it is appropriate to use high-strength reinforcement, this report presents results of analyses exploring whether performance of a building designed with high-strength reinforcement would be equivalent to that of a building designed with conventional reinforcement in accordance with ACI 318-11.
This task has been completed and produced the NIST GCR 14-917-30 report which may be ordered here in hard (printed) copy format.
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