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Seismic Performance of Steel Moment Frames Containing Concentric Bracing Equipped with Shape Memory Alloys

Author(s):



Medium: journal article
Language(s): en 
Published in: The Open Civil Engineering Journal, , n. 1, v. 13
Page(s): 189-200
DOI: 10.2174/1874149501913010189
Abstract: Background:

A building’s stability is a critical design element that structural engineers must understand. And, utilization of Shape Memory Alloys (SMAs) in steel structures can importantly diminish seismic residual deformations, which will facilitate postseismic retrofitting.

Objective:

The aim of the present study was to evaluate the seismic behavior of 7-story and 15-story steel frames with moment frame system having chevron concentric brace equipped with Shape Memory Alloys (SMAs). Braces containing various amount of alloy (including 20%, 40%, 60%, 80% and 100%) applied to study SMAs effect on structural performance. Relatively persistent displacement of the structure as well as its relative maximum displacement under the earthquake imposing on frame models were investigated using non-linear dynamic analysis by OpenSees finite element software. The earthquakes were in near- fault nine accelerographs, which involved various maximum accelerations.

Results:

Results indicated a reduction in relatively persistent displacement using 20% SMAs in braces. Addition more amount of alloy resulted in less relative displacement as compared to steel one braces.

Conclusion:

Applying SMAs brace showed a reduction in persistent structural displacement in any types of frames. Furthermore, adding more than 20% SMAs to the brace, resulted in a decrease in structural displacement.

Copyright: © 2019 Hamed Jabbari et al.
License:

This creative work has been published under the Creative Commons Attribution 4.0 International (CC-BY 4.0) license which allows copying, and redistribution as well as adaptation of the original work provided appropriate credit is given to the original author and the conditions of the license are met.

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  • About this
    data sheet
  • Reference-ID
    10403625
  • Published on:
    28/12/2019
  • Last updated on:
    28/12/2019