Incremental Dynamic Analysis of Shape Memory Alloy Braced Steel Frames

Abstract:

Incremental Dynamic Analysis (IDA) is a technique to determine the overall seismic performance of structures under varied intensities of earthquakes. In this paper, the seismic performance of four-story steel braced frames equipped with superelastic Shape Memory Alloy (SMA) braces is assessed by performing IDA. The seismic response of SMA-braced frames was compared to that of corresponding Buckling-Restrained Braced Frames (BRBFs). Based on the results of this comparative study, the SMA-braced frames were generally effective in reducing maximum interstory drifts and permanent roof deformations. In addition, the SMA-braced frames demonstrated more uniform drift distribution over the height of the building. As the intensity of earthquake excitation increases, a higher response reduction can be expected for SMA-braced frames.

• Periodical: Applied Mechanics and Materials (Volume 680)
• Pages: 263-266
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.680.263
• Online since: October 2014
• Authors: Saber Moradi*, Shahria Alam
• Keywords: Braced Steel Frame, Buckling-Restrained Braced Frame, Incremental Dynamic Analysis (IDA), Permanent Deformation, Shape Memory Alloy (SMA), Superelastic SMA

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