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Notation
Pages 68-71

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From page 68...
... ADT average daily traffic ADTT average daily truck traffic a depth of equivalent rectangular stress block (in.) ; length of beam shear span (in.)
From page 69...
... fct average splitting tensile strength of lightweight aggregate concrete (ksi) ff permissible fatigue stress range (ksi)
From page 70...
... β factor to account for amplification of strain calculated at the bar level to that at the surface due to strain gradient; factor relating effect of longitudinal strain on the shear capacity of concrete, as indicated by the ability of diagonally cracked concrete to transmit tension β1 factor relating depth of equivalent rectangular compressive stress block to neutral axis depth γ load factor γd, γe crack control exposure condition factor Δ shear displacement parallel to shear friction interface (in.) Δcr shear displacement parallel to shear friction interface at cracking load (in.)
From page 71...
... λ factor reflecting the reduced mechanical properties of lightweight concrete µ friction factor µφ curvature ductility ν Poisson's Ratio ρ reinforcement ratio = As/bd ρ′ reinforcement ratio = As′/bd ρb balanced reinforcement ratio ρg reinforcement ratio = As/Ag ρs ratio of spiral reinforcement to total volume of column core σsu tensile stress in interface steel reinforcement at ultimate shear load (ksi) τ shear capacity of reinforcing steel (ksi)


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