Abstract:
An innovative method of constructing equivalent monolithic moment resisting frames from precast elements is proposed. This method places in-situ concrete connections in the joint core regions, and uses ductile fibre reinforced cementitious composites (DFRCC) to ensure the robustness of these connections whilst significantly reducing reinforcement congestion and connection complexity. Although DFRCC is a relatively expensive product it is felt that the small volume of the connection and the ease of construction will make this method a practical alternative for real structures. Two beam-column joint subassemblies were constructed using this method and subjected to simulated seismic loading. The test units behaved well until very high drift and ductility levels were reached. Failure of the test units was either by buckling of the beam plastic hinges or shear failure of the joint core, depending on the anchorage detail of the beam longitudinal reinforcement in the joint core.