Incremental dynamic analysis of steel storage racks subjected to Chilean earthquakes

Steel storage racks are structures commonly used by all industries in Chile; nevertheless, due the seismic hazard in the country and its configurations, these structures are highly vulnerable to earthquakes and no specific regulations exist to design them. In this research, the seismic performance o...

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Bibliographic Details
Published in:Thin-walled structures 2023-01, Vol.182, p.110288, Article 110288
Main Authors: Nuñez, Eduardo, Aguayo, Catalina, Mata, Ramón
Format: Article
Language:English
Subjects:
Incremental dynamic analysis
Seismic behavior
Steel storage racks
Steel structures
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Summary:Steel storage racks are structures commonly used by all industries in Chile; nevertheless, due the seismic hazard in the country and its configurations, these structures are highly vulnerable to earthquakes and no specific regulations exist to design them. In this research, the seismic performance of steel storage racks subjected to Chilean Earthquakes was evaluated using nonlinear pushover and nonlinear dynamic analysis. The studied models consider different heights and global slenderness ratios in both directions and soil types. Racks were evaluated using an Incremental Dynamic Analysis (IDA) according to FEMA P695. Deformation values were exceeded in the down-aisle direction and the use of braces was necessary to control the interstory drift and high deformation levels. Also, the expected level of damage for drift design limits in models unbracing is not enough to keep the operation of the structures and more severe regulations are necessary to achieve a performance in agreement with Chilean design philosophy. Finally, the use of horizontal and lateral bracing improves the seismic performance of steel racks. •Seismic performance is evaluated from nonlinear static and dynamic analysis with variation of geometrical properties and seismic hazard.•Horizontal braces improve the seismic performance in steel storage racks.•An incremental dynamic analysis was used to assess the performance according to FEMAP695.•The common procedures for seismic performance evaluation could not assess the real performance of steel storage racks.•A suggestion to incorporate additional requirements to Chilean design code has been proposed.
ISSN:0263-8231
1879-3223
DOI:10.1016/j.tws.2022.110288