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Published: Građevinar 77 (2025) 9
Paper type: Scientific research paper
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Research on the seismic performance of frame structures with external fractal dimension-buckling restrained braces

Yubo Ren, Xiaobo Luo, Luchao Ma

Abstract

This study aimed to mitigate seismically induced displacement and deformation in reinforced concrete frame structures, thereby reducing earthquake-related damage and enhancing their structural seismic resilience. A novel fractal dimension-buckling restrained brace (FD-BRB), designed using MATLAB and Mandelbrot-derived fractal geometry, was applied for external frame retrofitting, and its seismic performance enhancement was quantified through ABAQUS simulations by comparing the structural behaviour before and after strengthening. This results demonstrate that externally applied FD-BRBs effectively mitigate localised damage in reinforced concrete frame structures under seismic loading, thereby reducing deformation and torsion. This intervention enhances the seismic performance and load capacity, extends the service life, lowers maintenance costs, and provides an efficient structural retrofitting solution that advances innovation in seismic-resistant systems.

Keywords
reinforced concrete frame structure, fractal dimension, buckling restrained braced, seismic performance, external reinforcement

HOW TO CITE THIS ARTICLE:

Ren, Y., Luo, X., Ma, L.: Research on the seismic performance of frame structures with external fractal dimension-buckling restrained braces, GRAĐEVINAR, 77 (2025) 9, pp. 845-858, doi: https://doi.org/10.14256/JCE.4276.2025

OR:

Ren, Y., Luo, X., Ma, L. (2025). Research on the seismic performance of frame structures with external fractal dimension-buckling restrained braces, GRAĐEVINAR, 77 (9), 845-858, doi: https://doi.org/10.14256/JCE.4276.2025

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Creative Commons License
This paper is licensed under a Creative Commons Attribution 4.0 International License.
Authors:
4276 A1 WEB
Yubo Ren
Qinghai University, China
Faculty of Civil Engineering
Key Laboratory of Energy-saving Building Materials and Engineering Safety of Qinghai, China
4276 A2 WEB
Xiaobo Luo
Qinghai University, China
Faculty of Civil Engineering
Key Laboratory of Energy-saving Building Materials and Engineering Safety of Qinghai, China
4276 A3 WEB
Luchao Ma
Qinghai University, China
Faculty of Civil Engineering
Key Laboratory of Energy-saving Building Materials and Engineering Safety of Qinghai, China