Behavior of High-Rise ASRS Steel Storage Rack Structure under Cyclic Loading

Abstract

Ultra-high steel storage racks are becoming more common to accommodate Automatic Storage and Retrieval System (ASRS). Past research studies on the behavior of steel storage rack focused on typical low-rise industrial racks. However, steel storage racks for ASRS system currently being used in Thailand might be as high as 20-30 meters. This article presents the behavior of high-rise ASRS steel storage rack structure under cyclic loading. The cyclic test was carried out by using a sub-assemblage structure which uses full-scaled cold-formed steel sections. The test specimen was 4 meters in height, 5 meters in width with 2 bays, and 0.98 meters in depth. The specimen represented the first 2 stories of the structure. The test was carried out under constant vertical load and varying lateral loads applying at 2 different points along the height of the structure. The magnitude of the lateral loads at the two levels were kept with a constant ratio. The key test results included displacement, base shear, and failure mode of the structure.