Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Fragility assessment of RC interconnected walls equipped with NiTi, Iron-based and Copper-based SMAs

Document Type : Original Article

Authors
Shahryar Feli 1
Jafar Asgari Marnani 2
Abbas Ghasemi 1
Soheil Monajemi Nejad 3
1 Department of Civil and Earth Resources Engineering, Islamic Azad University Central Tehran Branch Tehran, Iran
2 Department of Civil and Earth Resources Engineering, Islamic Azad University Central Tehran Branch, Tehran, Iran
3 Department of Civil and Earth Resources Engineering, Islamic Azad University Central Tehran Branch,, Tehran, Iran
10.22065/jsce.2024.483147.3542
Abstract
Recent advancements in earthquake-resistant materials have garnered significant attention from scholars due to their potential to mitigate seismic residual displacements and subsequently reduce maintenance costs. While novel materials and technologies have demonstrated their effectiveness in enhancing the seismic response of reinforced concrete (RC) buildings, their impact on post-earthquake challenges specific to RC-coupled walls remains unexplored. This study examines the seismic performance of RC-coupled walls reinforced with three types of superelastic shape memory alloy (SMA) rebars—NiTi, FeNCATB, and CuAlMn—in boundary zones. Three RC-coupled wall systems with four, eight, and twelve stories were selected as case studies. Afterward, Incremental Dynamic Analysis (IDA), was meticulously conducted to evaluate the structural performance under various levels of seismic excitation. Using the OpenSees program, the maximum critical values for the inter-story drift ratio (IDR) and the residual inter-story drift ratio (RIDR) were determined.

The results indicate a substantial reduction in RIDR when post-earthquake issues are considered. Among the three SMA types investigated, Cu-based SMA material exhibits the best performance in terms of RIDR reduction and restoration efficiency. Therefore, it is recommended to utilize Cu-based SMA materials in seismic-prone regions exposed to significant ground motions. This comprehensive analysis of the three materials contributes to a deeper understanding of the underlying mechanisms and benefits of SMA reinforcement in RC-coupled walls.
Keywords
NiTi
FeNCATB
CuAlMn
coupled wall
OpenSees

Subjects

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Journal of Structural and Construction Engineering
Volume 12, Issue 06 - Serial Number 95
September 2025
Pages 170-194

  • Receive Date 01 November 2024
  • Revise Date 24 November 2024
  • Accept Date 07 December 2024