Absorbing Capacity of Cushion System Using Concrete Slab Reinforced With AFRP Rods


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Title: Absorbing Capacity of Cushion System Using Concrete Slab Reinforced With AFRP Rods

Author(s): T. Tamura, H. Mikami, O. Nakano, and N. Kishi

Publication: Special Publication

Volume: 138


Appears on pages(s): 301-314

Keywords: fiber reinforced plastics; fibers; impact; impact strength; nuclear reactors; reinforced concrete; shock resistance; slabs; stresses; Structural Research

Date: 9/1/1993

Presents the results of experimental study on the shock-absorbing performance of a prototype three-layered cushion system. This system consists of a concrete core slab reinforced with a braided aramid fiber plastic (AFRP) rod, and sandwiched between sand (top) and expanded polystyrol (bottom) layers. To study the effect of the rigidity, elongation, and bond strength of reinforcing bars on the shock-absorbing performance of a three-layered cushion system, three types of reinforcing bars were used: AFRP rod with surface bonded with silica, nonsand surfaced AFRP rod, and deformed steel bar. Furthermore, these results were compared with the results when a single sand layer was used as cushion material. The results achieved from these experiments are: (1) the transmitted stress of the three-layered cushion system is distributed more effectively than that of a single sand layer; (2) the distribution pattern of the transmitted stress in the three-layered cushion system was affected by the bond property of the reinforcing bar; and (3) duration time of the transmitted impact force was affected by the rigidity of the reinforcing bars.