Headed Fastenings Acting in Cooperation with Supplementary Steel Reinforcement

Composite and precast concrete structural systems are becoming the first choice for many construction designers. Headed fastenings are currently a relatively common technique to create joints in such types of structures. Performance of fastenings usually depends on load capacity of the concrete surrounding the fastening. The resistance of the fastening may be increased by using supplementary reinforcement designed in order to prevent concrete cone failure. The background of current design methods and experimental research is discussed in the paper.