Sustainable steel-concrete composite structures are becoming more popular and widespread in construction not only because of their satisfactory load-carrying capacity but also due to sustainability and their ability to be demounted in case of any damage or at the end of the life span. This can be achieved by adopting demountable shear connectors. Besides, using one-sided assembly types of bolted shear connectors paves the way for easing the installation process, thus reducing energy consumption and project costs as well as traffic congestion in case of bridge maintenance. However, the behaviour of one-sided assembly bolted shear connectors in the fatigue regime, especially under the low-cycle fatigue domain has not been studied. In the current study, the low-cycle fatigue behaviour of the one-sided assembly type of bolted shear connectors was investigated through conducting experiments utilising the direct shear method and the results were compared with those of welded-headed studs. Experimental outcomes of the performance in terms of the number of cycles and stress range and failure modes will be compared to those of headed studs.