Properties of Sandwich Beams With Thin Layer of Steel-Fiber Reinforced Mortar

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Title: Properties of Sandwich Beams With Thin Layer of Steel-Fiber Reinforced Mortar

Author(s): Mohsen Rahimi and H. T. Cao

Publication: Special Publication

Volume: 124

Issue:

Appears on pages(s): 265-278

Keywords: beams (supports); bending; flexural strength; layered system; metal fibers; modulus of elasticity; mortars (material); thickness; sandwich structures; Structural Research

Date: 9/1/1990

Abstract:
Flexural behavior of sandwich beams reinforced with thin layers of steel-fiber reinforced mortar was studied in this investigation. The effect of variations in thickness of the reinforced layer on the modulus of rupture, Young's modulus, and toughness of the member was investigated. This investigation considered one single specimen size with fiber reinforced mortar using one fiber geometry and content. Steel fibers with 0.6 x 0.3 mm cross section and 18 mm long were used. The specimens were cast in 100 x 100 x 350 mm molds. Eight series of sandwich beams with different thicknesses of the reinforced layer were tested. Experimental results indicated that sandwich beams can have strength and toughness comparable to fully fiber reinforced beams. The minimum thickness of the fiber reinforced layer required to impart ductile behavior to the sandwich beam was found to be about one-sixth of the beam depth.