Study on the Static Performance of Prefabricated UHPC-Steel Epoxy Bonding Interface

Prefabricated UHPC-steel composite structure can make full use of the two materials’ mechanical and construction performance characteristics, with super properties durability, which has been proved to be a very promising structure. However, using traditional connectors connect prefabricated UHPC steel not only is inconvenient for prefabrication components but also introduces heavy welding work, detrimental speed antifatigue Bonding interface epoxy adhesive potential alternative avoid above problem. In order explore bonding interface, this study carried out direct shear test, tensile tensile-shear test epoxy-bonded (prefabricated interface). The results show that failure mainly manifested as peeling epoxy-UHPC destruction part matrix (the UHPC's surface). pure tension state, interfacial strength 5.14 MPa 1.18 MPa. 0.61 1.06 stress-displacement curves normal tangential direction are all in shape two-fold line. ultimate displacement was within 0.1 mm, showing characteristics brittle failure. Finally, numerical model specimen established based on cohesive element, coupling mechanism (tensile-shear effect) analyzed.