Research on Design Methodology and Finite Element Analysis of Inner Cores for Multi-Level Energy Dissipation and Self-Centering BRBs — Part I: Aluminum Alloy Core with ECC Encasement

DOI

10.2991/978-94-6463-514-0_50How to use a DOI?

Keywords

buckling-restrained brace inner core; multi-level energy dissipation; ECC; aluminum alloy; design methodology; hysteretic performance

Abstract

This paper proposes an innovative inner core for buckling-restrained braces with multi-mechanism energy dissipation and self-centering capabilities, referred to as Aluminum-ECC-Self-Centering Conical Taper (ALECCYT) inner core. Through theoretical deduction, an initial design methodology for the horizontal and vertical (structural) parameters of the outer ECC-wrapped aluminum (ALECC) inner core is presented. Based on this methodology, three ALECC braces with different tonnage capacities are designed. Subsequently, a finite element simulation analysis is conducted to qualitatively and quantitatively analyze the failure modes, hysteretic performance, and related indicators of the specimens, thereby verifying the effectiveness of the design methodology and the superiority of the ALECC inner core structure. The results indicate that the failure mode of the ALECC inner core specimens is the yield failure of the aluminum rod in the middle section, with ECC fully exerting its role in buckling prevention and energy dissipation. Compared to aluminum alloy braces, the ALECC inner core exhibits significantly improved bearing capacity and energy dissipation capacity, as well as enhanced hysteretic performance. The proposed preliminary design methodology for the ALECC inner core demonstrates good applicability.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Suokun Chen
AU  - Wei Zhang
AU  - Xiaomin Huang
AU  - Fang Wei
AU  - Weibing Xu
AU  - Hang Sun
PY  - 2024
DA  - 2024/09/28
TI  - Research on Design Methodology and Finite Element Analysis of Inner Cores for Multi-Level Energy Dissipation and Self-Centering BRBs — Part I: Aluminum Alloy Core with ECC Encasement
BT  - Proceedings of the 2024 7th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA 2024)
PB  - Atlantis Press
SP  - 508
EP  - 530
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-514-0_50
DO  - 10.2991/978-94-6463-514-0_50
ID  - Chen2024
ER  -