Assessment of the Seismic Behavior of Selective Storage Racks Subjected to Chilean Earthquakes

Metals

Eduardo Nuñez¹  Catalina Aguayo¹  Ricardo Herrera² 

[1] Department of Civil Engineering, Universidad Católica de la Santísima Concepción, Concepción 78349, Chile;Department of Civil Engineering, Universidad de Chile, Santiago de Chile 8370449, Chile;

关键词: storage racks;    seismic performance;    cold formed steel;    brace;    moment connection;   

DOI  :  10.3390/met10070855

来源: DOAJ

【 摘 要 】

A seismic performance evaluation of selective storage racks subjected to Chilean Earthquakes was conducted using nonlinear pushover and nonlinear dynamic time-history analyses. Nine seismic records with two horizontal components and magnitude Mw > 7.7 were applied to numerical models of prototype rack structures. The prototype racks were designed considering two types of soil and two aspect ratios. The inelastic behavior of beam connections was included in the models. The results showed a predominantly elastic behavior, mainly in the cross-aisle direction, in comparison to the down-aisle direction. The inelastic action was concentrated in pallet beams and up-rigths. Higher values of base shear were reached, due to elevated rigidity in rack configurations, and an acceptable performance was obtained. A response reduction factor was reported in both directions, reaching values larger than the limit imposed by the Chilean standard. However, values below this limit were obtained in the cross-aisle direction, in some cases. Finally, in all cases, the calculated response modification factor is highly influenced by the overstrength obtained from seismic design.

【 授权许可】

Unknown