Comparative Performance of Buckling-Restrained Braces and Moment Frames

August 30, 2004
Publication: 13th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 2004 Paper No. 2887
Author(s): Ronald Mayes Craig Goings Naguib, Wassim I. Stephen Harris Lovejoy, Jennifer Fanucci, Jerome P. Bystricky, Pavel Hayes, John R.

Abstract: This paper will provide a comparison of the maximum inter-story drifts and floor response spectra for 3 and 9 story buildings using both steel and aluminum BRBs designed with an R-factor of 7. The buildings had the same dimensions as those used in the SAC project [1] but were redesigned using the 1997 UBC. In addition the aluminum damper was designed as an energy dissipation element using the 2000 NEHRP (2) provisions and its performance is compared to the performance of a standard moment frame designed using the 1997 Uniform Building Code. Each of the building models was analyzed using a total of 20 time-histories that were selected from those developed as part of the SAC program for Los Angeles. One set each of 5 time-histories was representative of the mean spectra for the 100, 500 and 2500 year return period design events for Los Angeles, and the remaining 5 are representative of severe near-fault ground motions. The results of each set of 5 time histories were averaged. Due to space limitations only the 100 and 500 year results are presented.

Services: Structural Design