When the steel fiber reinforced concrete for road pavement, airport pavement, or other uses bending strength structural design specifications, and the corresponding curved steel fiber reinforced concrete collective concrete tensile strength grading and use of design values, according to existing national provisions cement concrete pavement, airport pavement design specifications and other industries use.
Steel fiber reinforced concrete flexural strength design value fftm = ftm (1 + αtm? Ρf? Lf / df)
fftm, ftm-- flexural strength steel fiber reinforced concrete standard value, design value;
αtm-- steel fiber on the tensile strength of steel fiber reinforced concrete impact factor, should be determined through experiments;
ρf-- fiber volume fraction (ie, volume fraction of steel fiber content)
lf-- steel fiber length
df-- steel fiber diameter or equivalent diameter
lf / df-- steel fiber aspect ratio
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