Fiber
Reinforced Polymer (FRP) bars represent an interesting alternative to
conventional steel as internal reinforcement
of Reinforced Concrete (RC)
members where some properties such as durability, magnetic transparency,
insulation, are of primary concern. Critical aspects of the design of FRP RC
members are serviceability issues, bond, and the reduced concrete contribution
to the shear
capacity compared to equivalent steel reinforced members. The
present paper focuses on the
calibration of Eurocode-like equation for the
evaluation of the shear strength of FRP RC members without shear reinforcement.
The calibration is based on an extensive database of experimental data
available in the literature. The concrete contribution to shear capacity is
analyzed considering tested members without shear reinforcement and, with
reference to Eurocode equation for shear capacity of steel RC members, a
modified equation is proposed. A parametric analysis is presented comparing the
results of the proposed equation with those given by both CSA and ACI
guidelines.