Enhancing earthquake resilience with strategically arranged inclined columns in multistoried RCC structures

Document Type

Article

Publication Date

6-1-2024

Abstract

Exploring innovative structural solutions to enhance seismic resilience in buildings is critical in advancing the field of modern structural engineering. This research contributes to this endeavor by analyzing the role of inclined columns within frame systems and their potential to strengthen the earthquake resistance of structures. This study assesses how variations in column inclination, configuration, and quantity affect seismic behavior by investigating two building models, one symmetrical and the other asymmetrical with over 80 variations. The research utilized both response spectrum and nonlinear pushover analyses and evaluated key seismic performance indicators, including story displacement, inter-story drift, base shear, and stiffness, supplemented by seismic fragility curves to gain a holistic understanding of the inclined columns' impact. Findings reveal that the strategic placement of inclined columns significantly improves seismic performance, with structures featuring all outer perimeter columns inclined inwards showing up to a 150% increase in stiffness and a 20% reduction in top story displacement. The inclination of columns outward from the core was found to exacerbate seismic effects which necessitated nuanced design consideration. Conversely, employing inclined columns along the same axis in asymmetric structures emerges as an effective strategy for balancing stiffness and enhancing earthquake energy dissipation across axes. These results highlight the effectiveness of inclined columns in mitigating seismic risks, underscoring the need for careful consideration of their configuration to optimize structural resilience and their potential as a retrofitting measure. This research contributes to advancing structural engineering practices by offering insights into the integration of inclined columns for seismic design, suggesting a promising direction for future building standards and construction methodologies, and retrofitting alternatives.

Identifier

85194581937 (Scopus)

Publication Title

Innovative Infrastructure Solutions

External Full Text Location

https://doi.org/10.1007/s41062-024-01540-3

e-ISSN

23644184

ISSN

23644176

Issue

6

Volume

9

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