Experimental Study on Anchorage Performance of Small-diameter Steel Bars Planted in Cement-based Grouting Materials Under Medium and Low-cycle Fatigue Load
The technology of planting bar is widely used in the reinforcement and reconstruction of building structures, but in the face of complex and diverse practical engineering needs, research related to this technology needs to be continually expanded. The experiment involves 24 CGM concrete specimens with embedded reinforcing bars at depths of 10d, 15d, and 20d, aiming to investigate the anchorage performance of C6 and C8 small-diameter steel bars under medium and low-cycle fatigue loading.The results showed that when the axial pullout load equals to the depth of the planted bar, the fatigue load significantly increases the slip amount and the slip rate of the interface between the rubber and the bar. The load—axial strain curve of the planted steel bar specimen was measured, and the influence of fatigue load and planting depth on the load distribution of the planted end was analyzed. It's proposed that when the small-diameter planted steel bar works under the fatigue load condition, the load on the planted end can be evenly distributed by appropriately increasing the depth of the planted steel bar, so as to reduce the slip of the rubber bar, avoid the bond failure, and enhance the anchorage performance.
planting barmedium and low cycle fatiguesmall-diameter steel baranchorage performance
万方数据
维普
