Flexural Performance of UHPC–Concrete–ECC Composite Member Reinforced with Perforated Steel Plates

A novel reinforced concrete structural member comprising ultrahigh-performance concrete (UHPC) and engineered cementitious composite (ECC) was proposed for use in underground structures, such as prefabricated utility tunnels. In this composite member, UHPC was used as the exterior (i.e., soil side) protective layer to prevent the penetration of water and corrosive agents, and ECC was used as the interior (i.e., service environment side)...