EXPERIMENTAL STUDY ON COMPRESSIVE BEHAVIOR OF A NOVEL GFRP-COLD FORMED STEEL COMPOSITE SANDWICH STRUCTURE

Abstract

Abstract: The GFRP-Cold Formed Steel composite sandwich structure (GCS structure) is composed of glass fiber reinforced polymer (GFRP) skins, light-weight PU foam core and cold formed steel (profiled steel sheet). The profiled steel sheet was embedded into the PU foam core to improve its Z-direction compression stiffness and strength. Compression tests were carried out to explore the compressive behavior of the GCS structures. By comparing to the conventional sandwich structures, the effects of the different parameters on the stiffness, ultimate compressive strength, failure modes and the energy absorption capacity of the novel sandwich structures were obtained. Test results indicated that the initial compressive stiffness and compressive strength were increased by 216.3% and 115.8%, compared to the conventional sandwich structures, respectively. But the energy absorption rate showed a decrease of 20.8%. The GCS structure shows the highest strength and stiffness-to-weight ratio. The stainless steel core rivet has little influence on the compressive performance of the GCS structure.

Key words: cold-formed steel, fiber reinforced polymer (FRP), sandwich structure, compressive stiffness, compressive strength, energy absorption capacity

CLC Number:

TB332

ZHANG Fu-bin, XU Jing, LIU Wei-qing, FANG Hai. EXPERIMENTAL STUDY ON COMPRESSIVE BEHAVIOR OF A NOVEL GFRP-COLD FORMED STEEL COMPOSITE SANDWICH STRUCTURE[J]. Fiber Reinforced Plastics/Composites, 2018, 0(10): 33-38.

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