Conventional non-prestressed or prestressed steel reinforcement used in reinforced concrete members are susceptible to corrosion especially when subjected to aggressive environments, where deicing salt is regularly used or is close to seawater. Fiber-reinforced polymer (FRP) offers an attractive replacement for steel reinforcement. Concrete members reinforced with steel bars are designed to behave in a tension-controlled manner in which yielding of steel precedes the crushing of concrete. Yielding of the steel bars gives a warning of pending failure of the members. On the other hand, FRP bars do not exhibit any ductility. Due to the lower axial stiffness of FRP bars, a concrete member reinforced with FRP bars has much lower stiffness due to greater crack widths along the member. The large crack widths and deeper cracks also reduce the depth of compression zone. Consequently, the contribution of aggregate interlock and compression zone in resisting shear is reduced significantly. Rupture of FRP bars prior to crushing of concrete is less desirable as the failure of members is abrupt and disastrous. Consequently, ACI 440 suggests that concrete members reinforced with FRP bars be designed to fail by crushing of concrete prior to rupture of FRP bars (i.e., a compression-controlled design approach). Neither of the two designs offer a ductile behavior compared to members reinforced with steel bars. In this regard, use of ultra-high-performance fiber-reinforced concrete (UHP-FRC) reinforced with FRP bars offers a new solution for flexural members require both high ductility and corrosion-resistant characteristics. UHP-FRC is an advanced cementitious material with improved mechanical properties and durability. UHP-FRC has an exceptional compressive ductility with a maximum useable compressive strain of 0.015-0.03, which allows a new design concept of using concrete as the ductile element in a flexural member. This research experimentally explored this new type of structural members by utilizing the high durability, compressive ductility, cracking resistance, and shear strength of UHP-FRC as well as the corrosion resistant high-strength FRP bars. Using high-strength FRP bars can reduce reinforcement congestion while achieving a high structural efficiency in members (that is, high flexural strength with a relative smaller cross section). The high shear strength of UHP-FRC also allows considerable reduction of shear reinforcement.